MZ-G755 - minidisc.org · MZ-G755 SECTION 1 SERVICING NOTE NOTES ON HANDLING THE OPTICAL PICK-UP...

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1 SERVICE MANUAL FM/AM PORTABLE MINIDISC RECORDER Model Name Using Similar Mechanism MZ-G750/R700 Mechanism Type MT-MZR700-172 Optical Pick-up Name LCX-4R MD recorder Audio playing system MiniDisc digital audio system Laser diode properties Material: GaAlAs MQW Wavelength: λ = 790 nm Emission duration: continuous Laser output: less than 44.6 μW (This output is the value measured at a distance of 200 mm from the lens surface on the optical pick-up block with 7 mm aperture.) Recording and playback time When using MDW-80 Maximum 160 min. in monaural Maximum 320 min. in stereo Revolutions 350 rpm to 2,800 rpm (CLV) Error correction ACIRC (Advanced Cross Interleave Reed Solomon Code) Sampling frequency 44.1 kHz Sampling rate converter Input: 32 kHz/44.1 kHz/48 kHz Coding ATRAC (Adaptive TRansform Acoustic Coding) ATRAC3-LP2 ATRAC3-LP4 SPECIFICATIONS Modulation system EFM (Eight to Fourteen Modulation) Number of channels 2 stereo channels 1 monaural channel Frequency response 20 to 20,000 Hz ± 3 dB Wow and Flutter Below measurable limit Inputs Microphone: stereo mini-jack, minimum input level 0.35 mV Line in: stereo mini-jack, minimum input level 49 mV Optical (Digital) in: optical (digital) mini- jack Outputs i: stereo mini-jack, maximum output level 5 mW + 5 mW, load impedance 16 ohm Radio Frequency range AM: 531-1,602 kHz FM: 87.5-108.0 MHz General Power requirements Sony AC Power Adaptor (supplied*) connected at the DC IN 3 V jack: 230 V AC, 50/60 Hz (AEP, FR, CET model) 240 V AC, 50 Hz (Australian model) 230-240 V AC, 50 Hz (UK, HK model) 110/220 V AC, 60 Hz (Korean model) 100-240 V AC, 50/60 Hz (E, JE model) Nickel cadmium rechargeable battery NC-WMAA (supplied) LR6 (size AA) alkaline battery (not supplied) *) Except for Korean model • Abbreviation FR : French model CET : East European & CIS model JE : Tourist model HK : Hong Kong model – Continued on next page – US and foreign patents licensed from Dolby Laboratories. Ver 1.0 2002. 04 Sony Corporation Personal Audio Company Published by Sony Engineering Corporation 9-873-965-01 2002D0400-1 © 2002. 04 AEP Model UK Model E Model Australian Model Tourist Model MZ-G755 The CE mark is valid only for products marketed in the European Union.

Transcript of MZ-G755 - minidisc.org · MZ-G755 SECTION 1 SERVICING NOTE NOTES ON HANDLING THE OPTICAL PICK-UP...

Page 1: MZ-G755 - minidisc.org · MZ-G755 SECTION 1 SERVICING NOTE NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT The laser diode in the optical pick-up block may suffer electro-static

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SERVICE MANUAL

FM/AM PORTABLE MINIDISC RECORDER

Model Name Using Similar Mechanism MZ-G750/R700

Mechanism Type MT-MZR700-172

Optical Pick-up Name LCX-4R

MD recorderAudio playing systemMiniDisc digital audio systemLaser diode propertiesMaterial: GaAlAs MQWWavelength: λ = 790 nmEmission duration: continuousLaser output: less than 44.6 µW(This output is the value measured at adistance of 200 mm from the lens surfaceon the optical pick-up block with 7 mmaperture.)Recording and playback timeWhen using MDW-80

Maximum 160 min. in monauralMaximum 320 min. in stereo

Revolutions350 rpm to 2,800 rpm (CLV)Error correctionACIRC (Advanced Cross Interleave ReedSolomon Code)Sampling frequency44.1 kHzSampling rate converterInput: 32 kHz/44.1 kHz/48 kHzCodingATRAC (Adaptive TRansform AcousticCoding)ATRAC3-LP2ATRAC3-LP4

SPECIFICATIONS

Modulation systemEFM (Eight to Fourteen Modulation)Number of channels2 stereo channels1 monaural channelFrequency response20 to 20,000 Hz ± 3 dBWow and FlutterBelow measurable limitInputsMicrophone: stereo mini-jack, minimuminput level 0.35 mVLine in: stereo mini-jack, minimum inputlevel 49 mVOptical (Digital) in: optical (digital) mini-jackOutputsi: stereo mini-jack, maximum output level5 mW + 5 mW, load impedance 16 ohm

RadioFrequency rangeAM: 531-1,602 kHzFM: 87.5-108.0 MHz

GeneralPower requirementsSony AC Power Adaptor (supplied*)connected at the DC IN 3 V jack:

230 V AC, 50/60 Hz (AEP, FR, CETmodel)240 V AC, 50 Hz (Australian model)230-240 V AC, 50 Hz (UK, HK model)110/220 V AC, 60 Hz (Korean model)100-240 V AC, 50/60 Hz (E, JE model)

Nickel cadmium rechargeable batteryNC-WMAA (supplied)LR6 (size AA) alkaline battery (notsupplied)

*) Except for Korean model

• AbbreviationFR : French modelCET : East European & CIS modelJE : Tourist modelHK : Hong Kong model

– Continued on next page –

US and foreign patents licensedfrom Dolby Laboratories.

Ver 1.0 2001. 01Ver 1.0 2002. 04

Sony CorporationPersonal Audio Company

Published by Sony Engineering Corporation

9-873-965-012002D0400-1

© 2002. 04

AEP ModelUK Model

E ModelAustralian Model

Tourist Model

MZ-G755

The CE mark is validonly for productsmarketed in theEuropean Union.

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Flexible Circuit Board Repairing• Keep the temperature of the soldering iron around 270°C

during repairing.• Do not touch the soldering iron on the same conductor of the

circuit board (within 3 times).• Be careful not to apply force on the conductor when soldering

or unsoldering.

Notes on chip component replacement• Never reuse a disconnected chip component.• Notice that the minus side of a tantalum capacitor may be

damaged by heat.

CAUTIONUse of controls or adjustments or performance of proceduresother than those specified herein may result in hazardousradiation exposure.

Battery operation timeBattery lifeWhen recording1) 2) (Unit: approx.hours) (JEITA3))

Batteries Stereo LP2 LP4NC-WMAA Nickel Cadmium 4 6 7.5rechargeable battery4)

LR6 (SG) Sony alkaline dry 96) 136) 166)

battery5)

When playing1) (Unit: approx.hours) (JEITA3))

Batteries Stereo LP2 LP4NC-WMAA Nickel Cadmium 11.5 14 16rechargeable battery4)

LR6 (SG) Sony alkaline dry 36 42 48battery5)

When using the radio1) (JEITA3))

Batteries Approx. hoursNC-WMAA Nickel Cadmium rechargeable 9.5battery4)

LR6 (SG) Sony alkaline dry battery5) 28.5

1) The battery life may be shorter due to operating conditions, thetemperature of the location, and varieties of batteries.

2) When you record, use a fully charged rechargeable battery.3) Measured value by the standard of JEITA (Japan Electronics and

Information Technology Industries Association).4) When using a 100% fully charged rechargeable battery.5) When using a Sony LR6 (SG) “STAMINA” alkaline dry battery

(produced in Japan).6) Recording time may differ according to the alkaline batteries.

DimensionsApprox. 81 × 28.1 × 74.4 mm (w/h/d)without projections.MassApprox. 118 g the recorder onlySupplied accessoriesNC-WMAA nickel cadmium rechargeable battery (1)AC power adaptor (Except for Korean model) (1)AC plug adaptor (Tourist model only) (1)Headphones/earphones with a remote control (1)Optical cable (1)Rechargeable battery carrying case (1)Carrying pouch/carrying case with a belt clip (1)

Design and specifications are subject to changewithout notice.

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINEWITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND INTHE PARTS LIST ARE CRITICAL TO SAFE OPERATION.REPLACE THESE COMPONENTS WITH SONY PARTS WHOSEPART NUMBERS APPEAR AS SHOWN IN THIS MANUALOR IN SUPPLEMENTS PUBLISHED BY SONY.

ATTENTION AU COMPOSANT AYANT RAPPORT À LA SÉCURITÉ!!

LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE 0 SURLES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DESPIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DEFONCTIONNEMENT. NE REMPLACER CES COMPOSANTSQUE PAR DES PIÈCES SONY DONT LES NUMÉROS SONTDONNÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTSPUBLIÉS PAR SONY.

MZ-G755

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1. SERVICING NOTE ......................................................... 4

2. GENERAL Looking at the controls ....................................................... 5

3. DISASSEMBLY3-1. Bottom Panel Assy .............................................................. 63-2. Upper Panel Assy ................................................................ 73-3. LCD Module ....................................................................... 73-4. Main Board ......................................................................... 83-5. MD Mechanism Deck ......................................................... 83-6. OP Service Assy .................................................................. 93-7. Holder Assy ......................................................................... 93-8. Motor Flexible Board ........................................................ 103-9. DC Motor (M602) ............................................................. 103-10. DC Motor (M601), DC Motor (M603) ............................. 11

4. TEST MODE4-1. Outline ............................................................................... 124-2. Setting Method of Test Mode ............................................ 124-3. Operation in Setting the Test Mode ................................... 124-4. Releasing the Test Mode ................................................... 124-5. Configuration of Test Mode .............................................. 134-6. Manual Mode .................................................................... 134-7. Overall Adjustment Mode ................................................. 144-8. Self-diagnosis Result Display Mode ................................. 144-9. Result the Error Display Code .......................................... 154-10. Sound Skip Check Result Display Mode .......................... 164-11. Key Check Mode ............................................................... 16

TABLE OF CONTENTS

5. ELECTRICAL ADJUSTMENTS5-1. Outline ............................................................................... 185-2. Precautions for Adjustment ............................................... 185-3. Adjustment Sequence ........................................................ 185-4. NV Reset ........................................................................... 185-5. Power Supply Manual Adjustment .................................... 195-6. Temperature Correction ..................................................... 205-7. Laser Power Check ........................................................... 205-8. Overall Adjustment Mode ................................................. 21

6. DIAGRAMS6-1. IC Pin Descriptions .......................................................... 246-2. Block Diagram – Servo Section – ..................................... 316-3. Block Diagram – Audio Section – .................................... 326-4. Block Diagram – System Control/Power Section – .......... 336-5. Printed Wiring Board – Main Section – ............................ 346-6. Schematic Diagram – Main Section (1/3) – ...................... 376-7. Schematic Diagram – Main Section (2/3) – ...................... 386-8. Schematic Diagram – Main Section (3/3) – ...................... 396-9. IC Block Diagrams ............................................................ 40

7. EXPLODED VIEWS7-1. Panel Section ..................................................................... 437-2. Chassis Section ................................................................. 447-3. MD Mechanism Deck Section .......................................... 45

8. ELECTRICAL PARTS LIST ...................................... 46

MZ-G755

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MZ-G755SECTION 1

SERVICING NOTE

NOTES ON HANDLING THE OPTICAL PICK-UPBLOCK OR BASE UNIT

The laser diode in the optical pick-up block may suffer electro-static break-down because of the potential difference generatedby the charged electrostatic load, etc. on clothing and the humanbody.During repair, pay attention to electrostatic break-down and alsouse the procedure in the printed matter which is included in therepair parts.The flexible board is easily damaged and should be handled withcare.

NOTES ON LASER DIODE EMISSION CHECKNever look into the laser diode emission from right above whenchecking it for adjustment. It is feared that you will lose your sight.

NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK(LCX-4R)The laser diode in the optical pick-up block may suffer electro-static break-down easily. When handling it, perform solderingbridge to the laser-tap on the flexible board. Also perform mea-sures against electrostatic break-down sufficiently before the op-eration. The flexible board is easily damaged and should be handledwith care.

OPTICAL PICK-UP FLEXIBLE BOARD

• In performing the repair with the power supplied to the set,removing the MAIN board causes the set to be disabled.In such a case, fix a convex part of the open/close detect switch(S806 on MAIN board) with a tape in advance.Handle the FLEXIBLE board (over write head) with care, as ithas been soldered directly to the MAIN board.In repairing the component side of MAIN board, connect theFLEXIBLE board (over write head) and the MAIN board withthe lead wires in advance. (See page 8)

• Replacement of CDX2674-204GA (IC801) used in this setrequires a special tool.

• On the set having the microcomputer version 1.000, someadjusted values were set in the manual mode at the shipment,but these data will be cleared when the NV is reset. Therefore,on the set having the microcomputer version 1.000, change theadjusted values following the Change of Adjusted Valuesimmediately after the NV was reset. (See page 18)

• If the nonvolatile memory was replaced on the set, the modifiedprogram data must be written to the nonvolatile memory. In sucha case, write the modified data that meets the microcomputerversion following the patch data rewriting procedure at thereplacement of nonvolatile memory. (See page 23)

laser-tap

S806

MAIN board

FLEXIBLE board(Over write head)

Tape

upper panel assy

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MZ-G755SECTION 2GENERAL This section is extracted from

instruction manual.

6

See pages in ( ) for more details.

A REC MODE button (25)

B OPEN button (11)

C T MARK button (51)

D END SEARCH button (14)(55)

E X (pause) button (15)(18)(32)(55)

F VOL +/– button (17)(55)The VOL + button has a tactile dot.

G DC IN 3V jack (10)(13)

H i (headphones/earphones) jack (11)(42)

I REC (record) switch (14)(24)

J <SELECT, button (27)(36)(49)

N (play) button (14)(17)The N button has a tactile dot../> (search/AMS) button (15)(18)(52)(55)CHARGE/x (stop) button (10)(14)(17)(26)(49)

K Display window (27)(36)

L MENU/ENTER button (26)(36)(48)

M Battery compartment (10)

N LINE IN (OPTICAL) jack (13)(24)

O MIC (PLUG IN POWER) jack (29)There is a tactile dot beside the MIC (PLUG IN POWER) jack.

P HOLD switch (11)(41)

SELECT

CHARGE

A

B

C

E

G

F

H

J

KL

M

O

P

N

I

D

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A Character information display (34)(39)Displays the disc and track names, error messages, track numbers, etc.

B Play mode indication (36)Shows the play mode of the MD.

C Time display

D Battery indication (58)Shows approximate battery condition.

E Mega bass indication (38).

F Level meter (33)Shows the volume of the MD being played or recorded.

G Recording mode (LP2/LP4/MONO) indication (25)

H SYNC (synchro-recording) indication

I REC indication (14)Lights up while recording. When flashing, the recorder is in record standby mode.

J REC REMAIN/REMAIN (remaining time/tracks) indication (34)(39)Lights up along with the remaining time of the track, the remaining time of the MD, or the remaining number of tracks.

K Disc indicationShows that the disc is rotating for recording, playing or editing an MD.

IE F G H KJ

A B DC

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A Headphones/earphonesCan be replaced with optional headphones/earphones.

B HOLD switch (11)(41)Slide to lock the controls of the remote control.

C RADIO ON/BAND button (20)(44)FM MODE button (21)

D Display window (44)

E VOL +/– buttons (17)(20)

F Jog leverX (pause)/MODE (18)(44)>N (AMS/search, play)/F+ button (17)(20)(45). (AMS/search)/F– button(18)(20)(45)

G x (stop)/RADIO OFF button (17)(21)(47)

B

A

C

D

E

F

G

9

A REC indication (14)Lights up while recording. When flashing, the recorder is in record standby mode.

B Play mode indication (36)Shows the play mode of the MD.

C Manual/Auto indication

D Mega Bass indication (38)

E FM/AM indication (44)

F MONO (monaural)/LOCAL indication

G Battery indication

H PRESET indication (44)Lights up while preset radio station is turned on.

I Number displayDisplays the preset numbers, track numbers, etc.

J Time/Frequency display

K MHz/kHz indication (44)MHz lights up when FM station is turned on and kHz lights up when AM station is turned on.

L AVLS indication (40)

A

H I J K L

B CD E F G

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Note : This set can be disassemble according to the following sequence.

SECTION 3DISASSEMBLY

3-1. BOTTOM PANEL ASSY

Note : Follow the disassembly procedure in the numerical order given.

6 bottom panel assy

4 claw

1

5

2 MI screws (1.4x2.0)

3 MI screws (1.4x2.0)

3-1. BOTTOM PANEL ASSY(Page 6)

3-2. UPPER PANEL ASSY(Page 7)

3-4. MAIN BOARD(Page 8)

3-6. OP SERVICE ASSY(Page 9)

SET

3-5. MD MECHANISM DECK(Page 8)

3-10. DC MOTOR (M601), DC MOTOR (M603)(Page 11)

3-8. MOTOR FLEXIBLE BOARD(Page 10)

3-3. LCD MODULE(Page 7)

3-7. HOLDER ASSY(Page 9)

3-9. DC MOTOR (M602) (Page 10)

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3-3. LCD MODULE

1 screws (1.7x2.5)

4 LCD module

claws

upper panel (B) sub assy

2 screws (1.7x2.5)

3

3-2. UPPER PANEL ASSY

2 MI screws (1.4x2.0)

1 MI screws (1.4x2.0)

3 upper panel assy

4 CN804

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3-5. MD MECHANISM DECK

2 set chassis assy

3 MD mechanism deck

boss

boss

1 MI screws (1.4x1.6)

3-4. MAIN BOARD

3 screws (M1.4x2)

6 Remove the solders.

7

9 Remove the solder.

q; battery case assy

qs battery coil spring

qd MAIN board

qa Remove the solder.

4 screws (M1.7x3)

5 screws (M1.4x2)

1 CN502

2 arm

8 CN501

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MZ-G755

3-7. HOLDER ASSY

3 Remove the holder assy to direction of the arrow B.

1 Open the holder assy.

A

2

B

boss

3-6. OP SERVICE ASSY

4 rack spring (s)

6 thrust detent spring

3 precision pan screw (M1.4)

5 precision pan screw (M1.4)1 washer (0.8 - 2.5)

2 gear (SA)

8 Pull off the lead screw.

7

B

A

9 Opening the over write head toward the direction A, remove theOP service assy toward the direction B.Note: Do not open the entire assy

forcibly, when opening the over write head.

over write head section

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4 two precision pan screws (M1.4)

5 DC moter (sled) (M602)

3 Remove four solders of motor flexible board.

1 washer (0.8 - 2.5)

2 gear (SA)

3-9. DC MOTOR (M602)

2 Remove two solders of DC motor (over write head up/down) (M603).

1 Remove four solders of DC motor (sled) (M602).

3 Remove four solders of DC motor (spindle) (M601).

DC motor (sled) circular hole

5 motor flexible board

4 adhesive sheet

Note: Align a circular hole in the stripping paperwith a circular hole in the DC motor (sled),when mounting the motor flexible board.

3-8. MOTOR FLEXIBLE BOARD

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MZ-G755

1 Remove six solders of motor flexible board.

4 three precision pan screws (M1.4)

qs DC moter (over write head up/down) (M603)

6 two precision pan screws (M1.4)

qa gear chassis assy

0 screw(M1.2 × 1.5)

9 gear (HA)

8 gear (HB)

7 washer (0.8 - 2.5)

2 washer (0.8 - 2.5)

3 gear (HC)

5 DC moter(spindle)(M601)

DC motor(over write head up/down)(M603)

gear chassis assy

gear (HA)

2.65 mm

Note: Press-fit the gear (HA) up to the position of the DC motor (over writehead up/down) (M603) as shown below.

3-10. DC MOTOR (M601), DC MOTOR (M603)

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2 In the normal mode, turn on the [HOLD] switch. While press-ing the [VOL --] key press the following order:

> t > t . t . t > t

. t > t . t X t X

SECTION 4TEST MODE

4-3. Operation in Setting the Test Mode• When the test mode becomes active, first the display check mode

is selected.• Other mode can be selected from the display check mode.• When the test mode is set, the LCD repeats the following dis-

play.

• When the X key is pressed and hold down, the display at thattime is held so that display can be checked.

Caution: On the set having the microcomputer version 1.000,some adjusted values were set in the manual mode atthe shipment, but these data will be cleared when theNV is reset. Therefore, on the set having the micro-computer version 1.000, change the adjusted valuesfollowing the Change of Adjusted Values immediatelyafter the NV was reset (see page 18).

4-4. Releasing the Test ModeFor test mode set with the method 1:Turn off the power and open the solder bridge on SL801 (TEST)on the MAIN board.Note: Remove the solders completely. Remaining could be shorted

with the chassis, etc.For test mode set with the method 2:Turn off the power.Note: If electrical adjustment (see page 18) has not been finished

completely, always start in the test mode. (The set cannotstart in normal mode)

4-1. Outline• This set provides the Overall adjustment mode that allows CD

(PB) and MO (REC/PB) disk to be automatically adjusted whenin the test mode. In this overall adjustment mode, the disc isdiscriminate between CD and MO, and each adjustment isautomatically executed in order. If a fault is found, the systemdisplays its location. Also, the manual mode allows eachindividual adjustment to be automatically adjusted.

• Operation in the test mode is performed with the set. A keyhaving no particular description in the text, indicates a set key.

• For the LCD display, the LCD on the set is shown.

4-2. Setting Method of Test ModeThere are two different methods to set the test mode:1 Short SL801 (TEST) on the MAIN board with a solder bridge

(connect pin 3 of IC801 to the ground). Then, turn on thepower.

MAIN BOARD (SIDE B)

C821

C815

X801

SL801(TEST)

C809

R817

C807

C808

R806

C814

FB80

1

AP817

AP828

BASSAll lit

This set LCD display

SYNCMONOLP24 RECREC DATE REMAIN

1 SHUFF PGM

AMPMF

e88:88

00 5

All off

Microcomputerversiondisplay

Ver 1.300

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4-5. Configuration of Test Mode

4-6. Manual ModeMode to adjust or check the operation of the set by function.Normally, the adjustment in this mode is not executed.However, the Manual mode is used to clear the memory, powersupply adjustment, and laser power check before performingautomatic adjustments in the Overall Adjustment mode.

• Transition method in manual mode1. Setting the test mode (see page 12).2. Press the > or [VOL +] key activates the manual mode

where the LCD display as shown below.

3. During each test, the optical pick-up moves outward or in-ward while the N or . key is pressed for several sec-onds respectively.

4. Each test item is assigned with a 3-digit item number;100th place is a major item, 10th place is a medium item, andunit place is a minor item.The values adjusted in the test mode are written to thenonvolatile memory (for the items where adjustment wasmade).

Press the > or VOL + key.

Press the x key.

Press the x key.

Press the x key.

Press the x key.

Press the N or REC key.

The key check quits, or open the upper panel.

Press the T MARK or ENTER key for severalseconds (about 3 seconds).

ENTER key

Test Mode (Display Check Mode)

Servo Adjustment

Manual Mode

Key Check Mode

Audio Adjustment

Power Supply Adjustment

OP Alignment Adjustment

Press the . or VOL – key.

Electrical Offset Adjustment

Overall Adjustment Mode

Sound Skip Check Result Display Mode

Self-diagnosis Result Display Mode

Power Supply AdjustmentAuto Item Feed

CD Overall Adjustment/MO Overall Adjustment

00 0Manual

This set LCD display

x key N key

x key N key

Major Item Switching

Minor Item Switching

Medium Item Switching

. key: Unit Place of item number decrease.

VOL – key: 10th Place of item number decrease.

VOL + key: 10th Place of item number increase.

VOL – key: Decreases the adjusted value.

VOL + key: Increases the adjusted value.

VOL – key: 100th Place of item number decrease.

VOL + key: 100th Place of item number increase.

N key: Unit Place of item number increase.

X key: When adjusted value is chaged: Adjusted value is written. When adjusted value is not changed: That item is adjusted automatically.

Adjusted Value Variation

Adjusted Value Write

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4-8. Self-diagnosis Result Display ModeThis set uses the self-diagnostic function system in which if anerror occurred during the recording or playing, the mechanismcontrol block and the power supply control block in themicrocomputer detect it and record its cause as history in thenonvolatile memory.By checking this history in the test mode, you can analyze a faultand determine its location.Total recording time is recorded as a guideline of how long theoptical pick-up has been used, and by comparing it with the totalrecording time at the time when an error occurred in the self-diagnosis result display mode, you can determine when the erroroccurred.Clear both self-diagnosis history data and total recording time, ifthe optical pick-up was replaced.

• Self-diagnosis result display mode setting method1. Setting the test mode (see page 12).2. In the display check mode, press the [ENTER] key activates the

self-diagnosis result display mode where the LCD display asshown below.

3. Then, each time the > key is pressed, LCD display descendsby one as shown below. Also, the LCD display ascends by onewhen the . key is pressed.

If the [ENTER] key on set is pressed with this display, the LCDswitches to the simple display mode.

4. Quit the self-diagnosis result display mode, and press the x keyto return to the test mode (display check mode).

5. The display changes a shown below each time the[ENTER] key on the set is pressed.

However in the power mode (item number 700’s), only theitem is displayed.

6. Quit the manual mode, and press the x key to return to thetest mode (display check mode).

4-7. Overall Adjustment ModeMode to adjust the servo automatically in all items.Normally, automatic adjustment is executed in this mode at therepair.For further information, refer to “Section 5 Electrical Adjustments”(see page 18).

This set LCD display

item numberadjustment valueaddress

• Address & Adjusted Value Display

0 113A4S1D

This set LCD display

item numberadjustment valuejitter value

• Jitter Value & Adjusted Value Display

0 110FEJ1D

This set LCD display

item numberadjustment value

block error value

• Block Error Value & Adjusted Value Display

0 11063B1D

This set LCD display

item numberadjustment valueADIP error value

• ADIP Error Value & Adjusted Value Display

0 11072A1D

This set LCD display

item numberadjustment value

• Item Title Display

0 11LrefPw 1D

item title

This set LCD display

error display codeTotal recording time when error occurred

0 XX1 0010

history code

0 XX1

0 XXN

0 XXN1

0 XXN2

0 XXR_

XX : Error code

: Total recording time

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• Description of indication history

History code number Description

1 The first error

N The last error

N1 One error before the last

N2 Two errors before the last

R_ Total recording time

4-9. Reset the Error Display CodeAfter servicing, reset the error display code.

• Setting method of reset the error display code1. Setting the test mode (see page 12).2. Press [ENTER] key activates the self-diagnosis result display

mode.3. To reset the error display code, press the X key (2 times) when

the code is displayed (except “R_****”).(All the data on the 1, N, N1 and N2 will be reset)

• Description of error indication codes

Problem Indication code Meaning of code Simple display Description

No error 00 No error --- No error

01Illegal access target

Adrs Attempt to access an abnormal addressaddress was specified

Servo system error 02 High temperature Temp High temperature

03 Focus error Fcus Disordered focus

04 Spindle error Spdl Abnormal rotation of disc

TOC error11 TOC error TOC Faulty TOC contents

12 Data reading error Data Data could not be read at SYNC

Power supply system error 22 Low battery LBat Momentary interruption detected

31 Offset error Ofst Offset error

32Focus error

ABCDFocus error

ABCD offset error ABCD offset error

Offset system error33

Tracking errorTE

Tracking errorOffset error Offset error

34X1 tracking error

X1TEX1 tracking error

Offset error Offset error

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4-11. Key Check ModeThis set can check if the set and remote commander function nor-mally.

• Setting method of key check mode1. Setting the test mode (see page 12).2. Press the [T MARK] key for several seconds (about 3 seconds)

activates the key check mode. (At the last two digits, AD valueof remote commander key line is displayed in hexadecimal)

3. When each key on the set and on remote commander is pressed,its name is displayed on the LCD. (The operated position isdisplayed for 4 seconds after the slide switch is operated. Ifany other key is pressed during this display, the remote com-mander LCD switches to its name display)

Example1: When > key on the set is pressed:

Example2: When N > key on the remote commander ispressed:

4-10. Sound Skip Check Result Display ModeThis set can display the count of errors that occurred during therecording/playing for checking.

• Setting method of sound skip check result displaymode

1. Set the test mode (see page 12).2. Press the N key or [REC] key, and the playing or recording

sound skip result display mode becomes active respectivelywhere the LCD displays the following.

3. When the N key is pressed, total error count is displayed onthe LCD, and each time the > key is pressed, the displayitem moves down by one as shown below. Also, if the . keyis pressed, the display item moves up by one, then if the [REC]key is pressed, the display in the record mode appears.When the [REC] key is pressed, total error count is displayedon the LCD, and each time the > key is pressed, the displayitem moves down by one as shown below. Also, if the . keyis pressed, the display item moves up by one, then ifthe N key is pressed, the display in the play mode appears.

This set LCD display

Total count record system errors (hex.)

0 00P R

Total count of playsystem errors (hex.)

• Cause of sound skip error

Cause of error Description of error

EIB Sound error correction error

PlayStat Decoder status error

Adrs Address access error

BEmp Buffer is empty

BOvrBuffer is full, and sounds weredumped

RecordBful

Buffer capacity becomes less,and forcible writing occurred

Rtry Retry times over

4. To quit the sound skip check result display mode and to returnto the test mode (display check mode), press the x key.

0 00P R

P R

0 00EIB

0 00Stat

0 00Adre

0 00BEmp

0 00######

######

0 00P R

0 00BOvr

0 00Bful

0 00Rtry

0 00######

Playing sound skipresult display

Recording sound skipresult display

: Total play/record errors (hex.): Counter of sound skip check each item (hex.): 6-digit address where sound was skipped last (hex.)

This set LCD display

0 00

: AD value of the remote commander key (hexadecimal OO to FF)

This set LCD display

0 00FF

: AD value of the remote commander key (hexadecimal OO to FF)

This set LCD display

0 00rPLAY

: AD value of the remote commander key (hexadecimal OO to FF)

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4. When all the keys on the set and on the remote commander areconsidered as OK, the following displays are shown for 4 sec-onds.

Example1: When the keys on the set are considered as OK:

Example2: When the keys on the remote commander are con-sidered as OK:

5. When all keys were checked or if the upper panel is opened,the key check mode quits and the test mode (display checkmode) comes back.

This set LCD display

0 00SET OK

: AD value of the remote commander key (hexadecimal OO to FF)

This set LCD display

0 00RMC OK

: AD value of the remote commander key (hexadecimal OO to FF)

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• Setting method of NV reset1. Select the manual mode of the test mode, and set item number

021NV Reset (see page 13).

2. Press the X key.

3. Press the X key once more.

4. Press the x key to quit the manual mode, and activate thetest mode (display check mode).

• Change of adjusted values1. Item numbers in which the adjusted values are to be modified

Item number 832Item number 862Item number 871Item number 872

2. Adjusted values modifying procedure1) Select the manual mode of the test mode, and set item number

832 (see page 13).

2) Adjust with the [VOL +] key (adjusted value up) or [VOL --]key (adjusted value down) so that the adjusted value becomesE4.

SECTION 5ELECTRICAL ADJUSTMENTS

5-1. Outline• In this set, automatic adjustment of CD and MO can be per-

formed by entering the test mode (see page 12).However, before starting automatic adjustment, the memoryclear, power supply adjustment, and laser power check must beperformed in the manual mode.

• A key having no particular description in the text, indicates aset key.

• For the LCD display, the LCD display on the set is shown.

5-2. Precautions for Adjustment1. Adjustment must be done in the test mode only.

After adjusting, release the test mode.2. Use the following tools and measuring instruments.

• CD disc TDYS-1 (Check MD disc)(Part No. : 4-963-646-01)

• MO disk (SONY MD disc available on the market)• Digital voltmeter• Laser power meter LPM-8001

(Part No. : J-2501-046-A)• Thermometer (using the Temperature Correction)

3. Unless specified otherwise, supply DC 3V from the DC IN3V jack (J601).

4. Switch positionHOLD switch ............................................... OFF

5-3. Adjustment Sequence

5-4. NV ResetCaution: In this set, certain adjustment values are set in the manual

mode at the factory.NV reset will cause data to be cleared.So, the adjustment values should be set again just afterNV reset is made.

1. NV Reset (Memory clear)

2. Power Supply Manual Adjustment

3. Temperature Correction (item number: 014)

4. Laser Power Check

5. Electrical Offset Adjustment

Caution: This adjustment must be made with no disc loaded.

6. CD Overall Adjustment

7. MO Overall Adjustment

Manual Mode

Manual Mode

Manual Mode

Overall Mode

Overall Mode

This set LCD display

0 21ResNV CC

This set LCD display

0 21Res OK?

This set LCD display

0 21Res

0 21Reset!

NV reset (after several seconds)

This set LCD display

8 32Pw-T W

: Adjusted value

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• Adjustment method of Vc PWM duty (L)(item number: 762)

1. Connect a digital voltmeter to the TP901 (VC) on the MAINboard, and adjust [VOL +] key (voltage up) or [VOL --] key(voltage down) so that the voltage becomes 2.50 ± 0.01 V.

2. Press the X key to write the adjusted value.(The item number changes to 763 when X key is pressed)

Adjustment and Connection Location: MAIN board(see page 21)

• Adjustment method of Vc PWM duty (H)(item number: 763)

1. Connect a digital voltmeter to the TP901 (VC) on the MAINboard, and adjust [VOL +] key (voltage up) or [VOL --] key(voltage down) so that the voltage becomes 2.50 ± 0.01 V.

2. Press the X key to write the adjusted value.(The item number changes to 764 when X key is pressed)

Adjustment and Connection Location: MAIN board(see page 21)

• Adjustment method of Vl PWM duty(item number: 764)

3) Press the X key to write the adjusted value.4) Select the manual mode of the test mode, and set item number

862 (see page 13).

5) Adjust with the [VOL +] key (adjusted value up) or [VOL --]key (adjusted value down) so that the adjusted value becomes01.

6) Press the X key to write the adjusted value.7) Select the manual mode of the test mode, and set item number

871 (see page 13).

8) Adjust with the [VOL +] key (adjusted value up) or [VOL --]key (adjusted value down) so that the adjusted value becomes20.

9) Press the X key to write the adjusted value.10) Select the manual mode of the test mode, and set item number

872 (see page 13).

11) Adjust with the [VOL +] key (adjusted value up) or [VOL --]key (adjusted value down) so that the adjusted value becomes39.

12) Press the X key to write the adjusted value.

5-5. Power Supply Manual Adjustment• Adjustment sequenceAdjustment must be done with the following steps.

• Setting method of power supply manual adjustment1. Make sure that the power supply voltage is 3V.2. Set the test mode (see page 12).3. Press the . or [VOL --] key to activate the overall adjustment

mode.

4. Press the [END SEARCH] key. (the [END SEARCH] key causesthe item number to be switched to 762.)

This set LCD display

8 62V1dat

: Adjusted value

This set LCD display

8 71V5num

: Adjusted value

This set LCD display

8 72V5dat

: Adjusted value

2. Vc PWM Duty (H) adjustment (item number 763)

3. Vl PWM Duty adjustment (item number 764)

1. Vc PWM Duty (L) adjustment (item number 762)

This set LCD display

0 00Assy 00

This set LCD display

7 62VclPWM

: Adjusted value

digitalvoltmeter

MAIN board

TP901 (VC)TP912 (GND)

This set LCD display

7 63VchPWM

: Adjusted value

digitalvoltmeter

MAIN board

TP901 (VC)TP912 (GND)

This set LCD display

7 64Vl PWM

: Adjusted value

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2. Press the . key continuously until the optical pick-upmoves to the most inward track.

3. Open the cover and set the laser power meter on the objectivelens of the optical pick-up.

4. Press the N key, and set the laser MO read adjustment mode(item number 011).

5. Check that the laser power meter reading is 0.81 ± 0.08 mW.6. Check that the voltage both ends (TP (+) and TP (–)) of resistor

R521 at this time is below 44 mV.7. Press the N key, and set the laser CD read adjustment

mode (item number 012).

8. Check that the laser power meter reading is 0.97 ± 0.10 mW.9. Check that the voltage both ends (TP (+) and TP (–)) of resistor

R521 at this time is below 44 mV.10. Press the N key, and set the laser MO write adjustment mode

(item number 013).

11. Check that the laser power meter reading is 4.95 ± 0.50 mW.12. Check that the voltage both ends (TP (+) and TP (–)) of resistor

R521 at this time is below 80 mV.13. Press the x key to quit the manual mode, and activate the

test mode (display check mode).

Checking and Connection Location: MAIN board (see page 21)

1. Connect a digital voltmeter to the TP902 (VL) on the MAINboard, and adjust [VOL +] key (voltage up) or [VOL --] key(voltage down) so that the voltage becomes 2.30 ± 0.01 V.

2. When press the X key to write the adjusted value, LCD dis-plays as follows and power supply manual adjustment has com-pleted.

Adjustment and Connection Location: MAIN board(see page 21)

5-6. Temperature Correction• Adjustment method of temperature correction1. Select the manual mode of test mode, and set the mode num-

ber 014 (see page 13).

2. Measure the ambient temperature.3. Adjust with [VOL +], [VOL --] key so that the adjusted value

(hexadecimal value) becomes the ambient temperature.(Initial value: 14h = 20 °C, Adjusting range: 80h to 7fh (–128°C to +127 °C)

4. Press the X key to write the adjusted value.

5-7. Laser Power CheckConnection :

Checking Method :1. Select the manual mode of test mode (see page 13), and set the

laser power adjusting mode (item number 010).

digitalvoltmeter

MAIN board

TP902 (VL)TP912 (GND)

This set LCD display

0 00ADJ OK

This set LCD display

0 14SetTmp

: Adjusted value

digitalvoltmeter

MAIN board

TP (+)TP (–)

laserpower meter

Optical pick-upobjective lens

This set LCD display

0 10Laser

This set LCD display

0 11LrefPw

: Adjusted value

This set LCD display

0 12HrefPw

: Adjusted value

This set LCD display

0 13WritPw

: Adjusted value

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5-8. Overall Adjustment Mode• Configuration of overall adjustment

Note: Adjust the CD first, when performing adjustment.

Adjustment/checking and Connection Location:

TP901 (VC)

TP912 (GND)

TP902 (VL)

R521TP (+) TP (–)

–MAIN BOARD (SIDE A)–

. key

> key

N key

N keyProtect switchON

Protect switchOFF

x key

x key

x key

x key

x key

x key

NG item exists or x key

Overall Adjustment Mode(Title Display)

CD OverallAdjusting

MO OverallAdjusting

CD OverallAdjustment

OK

MO OverallAdjustment

OK

CD OverallAdjustment

NG

NG item exists or x key

MO OverallAdjustment

NG

ElectricalOffset

Adjustment

Power SupplyAdjustment

Auto Item Feed

ENTER key

END SEARCH key

Test Mode (Display Check Mode)

All itemOK

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8. If OK through the overall MO adjustments, press the x keyto return to the test mode and terminate the overall adjustmentmode.

6. Insert MO disk in the set, and press the > key to set theoverall MO adjustment mode. Automatic adjustments are made.

7. In case of MO overall adjustment NG, reset the NV (see page18), then readjust from the temperature correction (see page20).

• Adjustment method of overall CD and MO adjustmentmode

1. Setting the test mode (see page 12).2. Press the . or [VOL --] key activates the overall adjust-

ment mode.

3. Insert CD disc in the set, and press the . key to set theoverall CD adjustment mode. Automatic adjustments are made.

4. In case of CD overall adjustment NG, reset the NV (see page18), then readjust from the temperature correction (see page20).

5. If OK through the overall CD adjustments, then perform over-all MO adjustments.

• Overall adjustment mode (Title display)

• Electrical offset adjusting methodCaution: The electrical offset adjustment must be made with no

disc loaded.1. Make sure that the power supply voltage is 3V.2. Set the test mode (see page 12).3. Press the . or [VOL --] key to activate the overall adjustment

mode.

4. Press the [ENTER] key.

5. Electrical offset adjustment is over, if the following displayappears.

This set LCD display

0 00Assy

: (Disc mark) At end power supply adjustment: Outside lit At end of electrical offset adj.:inside litNote: On the set having microcomputer version 1.000, the disc mark is displayed on the set LCD only.: Left side = MO overall adjustment information F : MO overall adjustment completed 1 : Manual adjustment exists (overall adj. not completed) 0 : Not adjusted Right side = CD overall adjustment information F : CD overall adjustment completed 1 : Manual adjustment exists (overall adj. not completed) 0 : Not adjusted

This set LCD display

0 00Assy 11

This set LCD display

0 35Ofst

: Adjusted value

This set LCD display

0 00OfstOK

This set LCD display

0 00Assy 11

This set LCD display

X XX

X XX: Item number for which on adjustment is being executed.

CD RUN

This set LCD display

0 00 NG OF

: NG item number

This set LCD display

0 00CD OK

This set LCD display

X XXMO RUN

X XX: Item number for which on adjustment is being executed.

This set LCD display

0 00 NG OF

: NG item number

This set LCD display

0 00MO OK

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• Overall CD and MO adjustment items1. Overall CD adjustment items

Item No. Description

312

313 CD electrical offset adjustment

314

321 CD tracking error gain adjustment

328 CD TWPP gain adjustment

324CD tracking error offset adjustment

332

336 CD ABCD gain adjustment

344 CD focus gain adjustment

345 CD tracking gain adjustment

521CD two-axis sensitivity adjustment

522

2. Overall MO adjustment items

Item No. Description

112

113MO electrical offset adjustment

114

118

221 Low reflective CD tracking error gain adjustment

224Low reflective CD tracking error offset adjustment

232

236 Low reflective CD ABCD level adjustment

244 Low reflective CD focus gain adjustment

245 Low reflective CD tracking gain adjustment

121 MO tracking error gain adjustment

122 MO TON offset adjustment

134 MO TWPP gain adjustment

131MO double speed read TWPP offset adjustment

132

136 MO ABCD gain adjustment

144 MO focus gain adjustment

145 MO tracking gain adjustment

434 MO write TWPP gain adjustment

431 MO write TWPP offset adjustment

432 MO tracking error offset adjustment

436 MO write ABCD gain adjustment

445 MO write tracking gain adjustment

411 MO normal speed read TWPP offset adjustment

412 MO tracking error offset adjustment

448 20 sec full recording

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MZ-G755SECTION 6DIAGRAMS

6-1. IC PIN DESCRIPTIONS• IC501 SN761057ADBT (RF AMP, FOCUS/TRACKING ERROR AMP)

Pin No. Pin Name I/O Description

1 TE O Tracking error signal output to the system controller (IC801)

2 REXT — Connect terminal to the external resistor for ADIP amp control

3 WPP-LPF — Connect terminal to the external capacitor for TPP/WPP low-pass filter

4 VREF O Reference voltage output terminal (+1 V)

5 C I Signal (C) input from the optical pick-up detector

6 D I Signal (D) input from the optical pick-up detector

7 D-C I Signal (D) input from the optical pick-up detector (AC input)

8 Iy I I-V converted RF signal (IY) input from the optical pick-up detector

9 Ix I I-V converted RF signal (IX) input from the optical pick-up detector

10 Jx I I-V converted RF signal (JX) input from the optical pick-up detector

11 Jy I I-V converted RF signal (JY) input from the optical pick-up detector

12 A I Signal (A) input from the optical pick-up detector

13 A-C I Signal (A) input from the optical pick-up detector (AC input)

14 B I Signal (B) input from the optical pick-up detector

15 TON-C — Connect terminal to the external capacitor for TON hold

16 CIG —Connect terminal to the external capacitor for the low-pass filter of NPP divider

denominator

17 CDN —Connect terminal to the external capacitor for the low-pass filter of CSL divider

denominator

18 PD-I I Light amount monitor input terminal (invert input)

19 PD-NI I Light amount monitor input terminal (non-invert input)

20 PD-O O Light amount monitor output terminal

21 ADIP O ADIP duplex FM signal (22.05 kHz ± 1 kHz) output to the system controller (IC801)

22 DVDD — Power supply terminal (+2.3 V) (digital system)

23 SBUS I/O SSB serial data input/output with the system controller (IC801)

24 SCK I SSB serial clock signal input from the system controller (IC801)

25 XRST I Reset signal input from the system controller (IC801) “L”: reset

26 OFTRK I Off track signal input from the system controller (IC801)

27 DGND — Ground terminal (digital system)

28 BOTM OBottom hold signal output of the light amount signal (RF/ABCD) to the system

controller (IC801)

29 PEAK OPeak hold signal output of the light amount signal (RF/ABCD) to the system

controller (IC801)

30 VREF075 — Connect terminal to the external capacitor for the internal reference voltage

31 VC O Middle point voltage (+1.2 V) generation output terminal

32 CCSL2 — Connect terminal to the external capacitor for TPP/WPP low-pass filter

33 RF OUT O Playback EFM RF signal output to the system controller (IC801)

34 AGND — Ground terminal (analog system)

35 to 37 EQ, LP, PS — Connect terminal to the external capacitor for the RF equalizer

38 AVCC — Power supply terminal (analog system) (+2.3 V)

39, 40 OFC-2, 1 — Connect terminal to the external capacitor for RF AC coupling

41 ABCD O Light amount signal (ABCD) output to the system controller (IC801)

42 FE O Focus error signal output to the system controller (IC801)

43 S-MON O Servo signal monitor output to the system controller (IC801)

44 ADIP-IN I ADIP duplex FM signal (22.05 kHz ± 1 kHz) input terminal

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• IC801 CXD2674-204GA (SYSTEM CONTROLLER, DIGITAL SIGNAL PROCESSOR, 16M BIT D-RAM)Pin No. Pin Name I/O Description

1 PAUSE KEY I PAUSE key signal input terminal (A/D input)

2 MIC SENSE OControl signal output to the microphone amp

“H”: HIGH, “L”: LOW, normally: “H” Not used (open)

3 XTEST I Input terminal for the test mode set up “L”: test mode (normally, fixed at “H”)

4, 5 NC O Not used (open)

6 MCUVDD0 — Power supply terminal (for microcomputer block) (+1.5 V)

7 MIFVSS3 — Ground terminal (for microcomputer I/F)

8 XRST I System reset signal input terminal from the power control (IC901) “L”: reset

9 S MON I Servo signal monitor input terminal (A/D input) from RF amp (IC501)

10 VB MON I Voltage monitor input terminal of UNREG power supply (A/D input)

11 CHG MON I Charge voltage monitor input terminal (A/D input) from XPC18A22AFCR2 (IC601)

12 VREF MON I Clear reference voltage input terminal (A/D input) from RF amp (IC501)

13, 14 SET KEY 1, 2 I Set key signal input terminal (A/D input)

15 STOP I STOP key signal input terminal (A/D input)

16 HIDC MON I HIGH DC voltage monitor input terminal (A/D input)

17 PLAY I PLAY key signal input terminal (A/D input)

18 REC KEY I REC key signal input terminal (A/D input)

19 HALF LOCK SW IHALF LOCK switch (S805) signal input terminal (A/D input)

“L”: when normal position, “H”: when locked

20 RMC KEY I Key input terminal (A/D input) of the remote commander attached headphone

21 AVDD — Power supply terminal (for the analog circuit block) (+2.8 V)

22 AVSS — Ground terminal (for the analog circuit block)

23 VDIOSC — Power supply terminal (for OSC cell) (+2.4 V)

24 OSCI I System clock (45.1584 MHz) input terminal

25 OSCO O System clock (45.1584 MHz) output terminal

26 VSIOSC — Ground terminal (for OSC cell)

27 DAVDD — Power supply terminal (for the built-in D/A converter) (+2.4 V)

28 VREFL I Reference voltage input terminal (for the internal D/A converter L-CH)

29 AOUTL O Built-in D/A converter (L-CH) output terminal

30 AOUTR O Built-in D/A converter (R-CH) output terminal

31 VREFR I Reference voltage input terminal (for the built-in D/A converter R-CH)

32 DAVSS — Ground terminal (for the built-in D/A converter)

33 ASYO O Playback EFM duplex signal output terminal

34 ASYI I Playback EFM comparison slice level input terminal

35 AVD1 — Ground terminal (for the analog) (+2.4 V)

36 BIAS I Bias input for the playback EFM comparison

37 RFI I Playback EFM RF signal input from RF amp (IC501)

38 AVS1 — Ground terminal (for the analog)

39 PCO O Phase comparison output for the master clock of playback EFM system master PLL

40 PDO O Phase comparison output for the analog PLL Not used (open)

41 FILI I Filter input for the master clock of the playback EFM system master PLL

42 FILO O Filter output for the master clock of the playback EFM system master PLL

43 CLTV I Internal VCO control voltage input for the playback EFM system master PLL

44 PEAK I Peak hold signal input of the light amount signal (RF/ABCD) from RF amp (IC501)

45 BOTM I Bottom hold signal input of the light amount signal (RF/ABCD) from RF amp (IC501)

46 ABCD I Light amount signal (ABCD) input from RF amp (IC501)

47 FE I Focus error signal input from RF amp (IC501)

48 AUX1 I Support signal (I3 signal/temperature signal) input terminal (A/D input)

49 VC I Middle point voltage (+1.2 V) input terminal

50 ADIO O Monitor output of A/D converter input signal Not used (open)

51 ADRT I A/D converter the upper limit voltage input (fixed at “H” in this set)

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Pin No. Pin Name I/O Description

52 AVD2 — Power supply terminal (for the analog) (+2.4 V)

53 AVS2 — Ground terminal (for the analog)

54 ADRB I A/D converter the lower limit voltage input (fixed at “L” in this set)

55 SE I Sled error signal input terminal Not used (fixed at “L”)

56 TE I Tracking error signal input from RF amp (IC501)

57 DCHG — Connecting analog power supply of the low impedance (fixed at “H” in this set)

58 APC I Error signal input for the laser automatic power control Not used (fixed at “H”)

59 DSPVDD0 — Power supply terminal (for DSP block) (+1.5 V)

60 DSPVSS0 — Ground terminal (for DSP block)

61 XTSL IInput terminal for the frequency set up of the system clock

“L”: 45.1584 MHz, “H”: 22.5792 MHz (fixed at “L” in this set)

62 DIN1 I Input terminal of the record system digital audio signal

63 DOUT O Output terminal of the playback system digital audio signal Not used (open)

64 DAPWMLP O D/A converter PWM output (L-CH right phase) Not used (open)

65 DAPWMLN O D/A converter PWM output (L-CH reverse phase) Not used (open)

66 DAPWMRP O D/A converter PWM output (R-CH right phase) Not used (open)

67 DADT O Audio data output Not used (open)

68 ADDT I Data signal input from the external A/D converter (IC301)

69 LRCK O L/R sampling block signal (44.1 kHz) output to the external A/D converter (IC301)

70 XBCK O Bit clock signal (2.8224 MHz) output to the external A/D converter (IC301)

71 FS256 O 11.2896 MHz clock signal output to the external A/D converter (IC301)

72 MVCI I Vibrate input for the digital in PLL from the external VCO Not used (fixed at “L”)

73 DSPVDD1 — Power supply terminal (for DSP block) (+1.5 V)

74 ADFG I ADIP duplex FM signal (20.05 ± 1 kHz) input from RF amp (IC501)

75 F0CNT O Filter cut off control signal output Not used (open)

76 DIFVDD0 — Power supply terminal (for DSP I/F) (+2.3 V)

77 DIFVSS0 — Ground terminal (for DSP I/F)

78 APCREF OControl signal output to the reference voltage generation circuit for the laser

automatic power control

79 LDDR O PWM signal output for the laser automatic power control Not used (open)

80 TRDR O Tracking servo drive PWM signal output (–) to the motor driver (IC551)

81 TFDR O Tracking servo drive PWM signal output (+) to the motor driver (IC551)

82 FFDR O Focus servo drive PWM signal output (+) to the motor driver (IC551)

83 FRDR O Focus servo drive PWM signal output (–) to the motor driver (IC551)

84 MCUVDD1 — Power supply terminal (for the microcomputer block) (+1.5 V)

85 FGIN I FG signal input terminal for the spindle servo Not used (open)

86 FS4 O 176.4 MHz clock signal output to the power control (IC601, IC901)

87 SPRD/SPDU/RTG0 O Spindle servo drive PWM signal output (–) to the motor driver (IC551)

88 SPFD/SPVS/PWM3 O Spindle servo drive PWM signal output (+) to the motor driver (IC551)

89 SPDV/RTG1 OSpindle motor drive control signal output (V)/RTG output 1 to the motor

driver (IC551)

90 SPDW/RTG2 OSpindle motor drive control signal output (W)/RTG output 2 to the motor

driver (IC551)

91 DSPVDD2 — Power supply terminal (for DSP block) (+1.5 V)

92 DSPVSS1 — Ground terminal (for DSP block)

93 SPCU I Spindle motor drive comparison signal input (U) from the motor driver (IC551)

94 SPCV I Spindle motor drive comparison signal input (V) from the motor driver (IC551)

95 SPCW I Spindle motor drive comparison signal input (W) from the motor driver (IC551)

96 SRDR O Sled servo drive PWM signal output (–) to the motor driver (IC551)

97 SFDR O Sled servo drive PWM signal output (+) to the motor driver (IC551)

98 SLDV OSled motor drive signal output (V) to the motor driver (IC551)/drive control signal

output (1–)

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27

MZ-G755

Pin No. Pin Name I/O Description

99 SLDW OSled motor drive signal output (W) to the motor driver (IC551)/drive control signal

output (2+)

100 SLCU I Spindle motor drive comparison signal input (U) from the motor driver (IC551)

101 SLCV I Spindle motor drive comparison signal input (V) from the motor driver (IC551)

102 SLCW I Spindle motor drive comparison signal input (W) from the motor driver (IC551)

103 DIFVDD1 — Power supply terminal (for DSP I/F) (+2.3 V)

104 DIFVSS1 — Ground terminal (for DSP I/F)

105 EFMO O EFM encode data output for the record to the over write head drive (IC601)

106 MNT0 O Internal DSP monitor output (0) terminal Not used (open)

107 MNT1 O Internal DSP monitor output (1) terminal Not used (open)

108 MNT2 O Internal DSP monitor output (2) terminal Not used (open)

109 MNT3 O Internal DSP monitor output (3) terminal Not used (open)

110 SENSE O Internal DSP (SENS) monitor output terminal Not used (open)

111 TX ORecord data output enable signal output monitor terminal of the internal DSP

Not used (open)

112 RECP O Laser power changeover signal output monitor terminal Not used (open)

113 DSPVDD3 — Power supply terminal (for DSP block) (+1.5 V)

114 to 117 NC O Output terminal for the external D-RAM Not used (open)

118 DRAMVSS0 — Ground terminal (for the external D-RAM)

119 DRAMVDD0 — Power supply terminal (for the external D-RAM) (+2.4 V)

120 to 138 NC O Output terminal for the external D-RAM Not used (open)

139 DRAMVDD1 — Power supply terminal (for the external D-RAM) (+2.4 V)

140 DRAMVSS1 — Ground terminal (for the external D-RAM)

141 TSB MST VDD — Power supply terminal (for TSB master communication) (+2.8 V)

142 RMC DTCK I/O TSB serial data input/output with the remote commander attached headphone

143 TSB SLV VDD — Power supply terminal (for I/F to TSB slave communication) (+2.3 V)

144 (TSB SLVI) I TSB slave signal input from the remote commander attached headphone (fixed at “L”)

145 (TSB SLVO) OTSB slave signal output from the remote commander attached headphone

Not used (open)

146 TDI I Data input terminal for JTAG Not used (open)

147 TMS I Test mode control input terminal for JTAG Not used (open)

148 TCK I Clock input terminal for JTAG Not used (open)

149 XTRST I Reset input terminal for JTAG Not used (open)

150 TDO O Data output terminal for JTAG Not used (open)

151 JTAGVDD — Power supply terminal (for JTAG) (+2.4 V)

152 JTAGVSS — Ground terminal (for JTAG)

153 MCUVDD2 — Power supply terminal (for the microcomputer block) (+1.5 V)

154 MIFVDD0 — Power supply terminal (for the microcomputer I/F block) (+2.3 V)

155 MIFVSS0 — Ground terminal (for the microcomputer I/F block)

156, 157 TEST1, 0 I Input terminal for the main test (normally, fixed at “L”)

158 EVA I EVA/FLASH chip discrimination terminal “L”: FLASH chip, “H”: EVA chip

159 (OPR LED) O Not used (open)

160 SSB DATA I/O Input/output of SSB serial data with RF amp (IC501)

161 SSB CLK O SSB serial clock output to RF amp (IC501)

162 MCUVSS0 — Ground terminal (for the microcomputer block)

163 VREC PWM O Over write head control spare terminal Not used (open)

164 VL PWM OPWM for the laser automatic power supply voltage control signal output to the power

control (IC901)

165 VC PWM OPWM signal output for the system power supply voltage control to the power control

(IC901)

166 SPDL AUX PWM O PWM signal output for the spindle support to the motor driver (IC551)

167, 168 NC O Not used (open)

169 CLK SEL O System clock select signal output to the power control (IC901)

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28

MZ-G755

Pin No. Pin Name I/O Description

170 OPEN CLOSE SW IOpen/close detection switch (S806) of the upper panel input terminal (A/D input)

“L”: when upper panel close

171 GND SW O Control signal output to the ground (GND) changeover switch

172 SET CODE0 O Input terminal for the set (open in this set)

173 SET CODE 1 O Input terminal for the set (fixed at “L” in this set)

174 SET CODE2 O Input terminal for the set (open in this set)

175 SET CODE3 O Input terminal for the set (fixed at “L” in this set)

176 MIFVDD1 — Power supply terminal (for the microcomputer I/F block) (+2.3 V)

177 MIFVSS1 — Ground terminal (for the microcomputer I/F block)

178 (AOUT SEL) O HP/LINE changeover signal output Not used (open)

179 SI0 I Serial data input from the nonvolatile memory (IC804) and liquid crystal display panel

180 SO0 OSerial data output to the nonvolatile memory (IC804), A/D converter (IC301) and

liquid crystal display panel

181 SCK0 OSerial clock signal output to the nonvolatile memory (IC804), A/D converter (IC301)

and liquid crystal display panel

182 XGUM ON IBattery pack detection switch input terminal for the charge

“L”: there is battery pack for the charge Not used (open)

183 BEEP O Beep sound control signal output to the headphone amp (IC302)

184 NC O Not used (open)

185 VD SEL O VD power supply changeover signal output terminal Not used (open)

186 (XMUTE) O Analog muting control signal output terminal “L”: muting ON Not used (open)

187 LCD RST AUX O Reset control signal output terminal to the liquid crystal display panel “L”: reset

188, 189 NC O Not used (open)

190 XPATCH I Patch function detection input terminal “L”: patch function Fixed at “L” in this set

191 OPT DET I DIN plug detection signal input terminal

192 XJACK DET I LINE IN plug detection signal input terminal

193 XMIC DET I Microphone plug detection signal input terminal

194, 195 PD S0, 1 O PD IC mode changeover signal output to the optical pick-up

196 MIFVDD2 — Power supply terminal (for the microcomputer I/F block) (+2.3 V)

197 to 199 MODE1 to 3 OPower supply control signal output (for the over write head drive) to the over write

head drive (IC601)

200, 201 HD CON 1, 2 O Over write head control signal output to the over write head drive (IC601)

202 REC WBL SW O LPF changeover switch input terminal when REC/PB control Not used (open)

203 XCS ADA O Chip select signal output to A/D converter (IC301)

204 XPD ADA O Power supply control signal output for the drive to A/D converter (IC301)

205 XCS LCD O Chip select signal output to the liquid crystal display panel

206 LCD STB O Strobe signal output to the the liquid crystal display panel

207 LCD RST O Reset control signal output to the liquid crystal display panel Not used (open)

208 (REC LED) O LED ON/OFF control signal output for REC display Not used (open)

209 LD ON O ON/OFF control signal output terminal of the laser diode Not used (open)

210 TSB SLV CHK I TSB slave detection signal input terminal

211 (K-TAI-MON) I Not used (open)

212 (K-TAI-SW) I Not used (open)

213 MCUVSS1 — Ground terminal (for the microcomputer block)

214 CAV CLV SW O CAV/CLV changeover control signal output Not used (open)

215 XOPT CTL O Power supply ON/OFF control signal output for DIN PD drive

216 (CS RTC) O Chip select signal output to the clock IC Not used (open)

217 OFTRK I Off track signal input from RF amp (IC501)

218 MUTE O Analog muting control signal output “H”: muting ON

219 XCS NV O Chip select signal output to EEPROM (IC804)

220 XRST MTR DRV O Reset control signal output to the motor driver (IC551)

221 XRF RST O Reset control signal output to RF amp (IC501)

222 MCUVDD3 — Power supply terminal (for the microcomputer block) (+1.5 V)

Page 29: MZ-G755 - minidisc.org · MZ-G755 SECTION 1 SERVICING NOTE NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT The laser diode in the optical pick-up block may suffer electro-static

29

MZ-G755

Pin No. Pin Name I/O Description

223 SPDL MON I Spindle servo monitor signal input from the motor driver (IC551)

224 (XAVLS) I Not used (open)

225, 226 (SOUND 1, 2) I Not used (open)

227 XHOLD SW I HOLD switch input terminal “L”: hold ON, “H”: hold OFF

228 (SYCN REC) I SYNCHRO REC switch input terminal “L”: OFF, “H”: ON Not used (open)

229 (NC) O Not used (open)

230 PROTECT IDetection input terminal of the record check claw from the protect detection switch

(S803) “L”: recording possible condition, “H”: protect

231 FLASHVDD — Power supply terminal (for the internal FLASH ROM) (+2.4 V)

232 FLASHVSS — Ground terminal (for the internal FLASH ROM)

233 SLD MON I Sled servo monitor signal input from the motor driver (IC551)

234 VLON OPower supply control signal output for the laser diode drive to the power

control (IC901)

235 SLEEP O System sleep control signal coutput to the power control (IC901) “H”: sleep ON

236 FFCLR O Input latch output for the start switching to the power control (IC901)

237 CHG GAIN O Charge gain control signal output to the power control (IC601)

238 CHG O Charge ON/OFF control signal output to the power control (IC601) “H”: charge ON

239 (TUN REG ON) O Not used (open)

240 XHP STBY O Headphone standby signal output to the headphone amp (IC302)

241 MIFVDD3 — Power supply terminal (for the microcomputer I/F block) (+2.3 V)

242 MIFVSS2 — Ground terminal (for the microcomputer I/F block)

243 TEST2 O Input terminal for the main test (normally, open)

244 NC — Not used (open)

Page 30: MZ-G755 - minidisc.org · MZ-G755 SECTION 1 SERVICING NOTE NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT The laser diode in the optical pick-up block may suffer electro-static

30

MZ-G755

MEMO

Page 31: MZ-G755 - minidisc.org · MZ-G755 SECTION 1 SERVICING NOTE NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT The laser diode in the optical pick-up block may suffer electro-static

MZ-G755

31 31

6-2. BLOCK DIAGRAM — SERVO SECTION —

33 24 8135 25 80

TRACKINGCOIL DRIVE

10 19 828 18 83

FOCUSCOIL DRIVE

14 1742

16

233

98

SLED VOLTAGEMONITER

SPINDLESERVODRIVE

SWITCHIC805

4112

20 9729 26 99

MAIN BOARD (1/3)MOTOR FLEXIBLEBOARD

AUTOMATICPOWER

CONTROLQ501

2

1911

12

5

8

18

14

9

10

15

16

17

7

6

1

3

19

109

JX JY JX

IX IY

Iy

HR601OVERWRITEHEAD

MDMECHANISM

(1/2)

Ix

Jx

Jy

A

B

C

D

PD

IX

A

F

B C D

LD

S0S1

2-AXISDEVICE

LD-A

D

D-C

PD-I

PD-O

C

BA

VREF

A-C

JYJXIXIY

RF AMP,FOCUSERROR,

TRACKINGERROR

TPP/WPP

APC

SERIALINTERFACE

RF OUT

PEAK

BOTM

ABCD

FE

ADIP IN

TE

ADIP

PD-NI

RFI

PEAKBOTM

ABCD

FE

TE

ADFG

APCREFVC

OFTRKVREF MON

XRF RST

SSB DATASSB CLK

S MON

PD S0PD S1

OFTRK

VC

SBUSSCK

S MON

XRST

PEAK/BOTM

CHARGEPUMP2

RF AMP,FOCUS/TRACKING ERROR AMPIC501

CN501

TRK+

TRK–

FCS+

FCS–

SLED1+

SLED1–

SLED2+

SLED2–

CLVW

CLVN

CLVV

CLVU

TRK+

TRK–

FCS+

FCS–

MIMECHANISM

(2/2)

M602(SLED)

M601(SPINDLE)

U

VW

S-MONITOR

BIAS

4

891011

137

18

20

43

25

26

31

2144

1

42

41

28

33

29

9

4912

78

74

56

47

46

45

37

105

44

35

733

38

25

41

100

68

62

93

1456

12

2423

161

194195

160

217

221

101

94

95

SLEDMOTORDRIVE

403139

3837

27 102

166

88

48 4 87223

533

SPINDLEVOLTAGE MONITOR

5246 89

44 2 90

220

SPINDLEMOTORDRIVE

5154

55 56 1

CHARGEPUMP1

3742

2827

3130

4

EFMPRE DRIVER

OVER WRITEHEAD DRIVE

Q604,605

HI-BRIDGEPRE DRIVER

199 198 197 201 200

1 2 3 5 6

M603OVER WRITE

HEADUP/DOWN

OPTICAL PICK-UP BLOCK(LCX-4R)

7•8

11

12

13

3•45•61•2

14•

15

DIN1

ADDT

AUDIOSECTION

1

CLK

VREF

SYSTEMCONTROL/POWERSECTION

2

(1/2)

MOTOR FLEXIBLEBOARD (2/2)

19

SYSTEM CONTROL (1/2)

EFM

CLK

VRECIN2VRECIN1

C1HC1L

C2H

C2L

SW RECO

NOE RI FI

OVER WRITE HEAD DRIVEIC601 (1/2)

VRECOB+

HD DRV–HD DRV+

CN502 (1/2)

CN502 (2/2)

6

96

5

SLD1 MONSLD2 MON

CLV MON U

CLV MON V

CLV MON W

TFDRTRDR

FFDRFRDR

SLD MONSLDR

SLDVSFDRSLDW

SLCU

DIN1

EFM

O

MOD

E3M

ODE2

MOD

E1

HD C

ON2

HD C

ON1

ADDT

SLCV

SPCU

SPCV

SPCW

SLCW

SPDL AUX PWM

SPFD/SPVS/PWM3

SPDL MONSPRD/SPDU/RTG0

SPDV/RTG1

SPDW/RTG2

XRST MTR DRV

HB

HA

OUTAOUTB

HD DRV+HD DRV–

VREF

CPW

O

CPVO

CPUO

CLV

MON

W

CLV

MON

VCL

V M

ON U

CLVU

SLD 1 MONSLD 2 MON

CLVW

CLVN

CLVV

FO3TRK+TRK–

FCS+FCS–

RO3

FO1

R01

FO2SLED1+

SLED1–

SLED2+

SLED2–

CPAIPRO2

CPAIMFO4

CPBIPR04CPBIM

CPAO

CPBO

UO

WO

CPWICOM

CPUIVOCPVI

FI3RI3

FI1RI1

FI2

FI2PWM24

FI4

RI4

PWM

UI

VI

WI

OE

(FOCUS) (TRACKING)

FOCUS/TRACKINGCOIL DRIVE,SPINDLE/SLED

MOTOR DRIVEIC551

SYSTEM CONTROLLER,DIGITAL SIGNAL PROCESSOR,

16M BIT D-RAMIC801 (1/3)

SERVO SECTION

Signal path : PLAYBACK : REC (ANALOG) : REC (DIGITAL)

(Page 32)

(Page 33)

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MZ-G755

3232

6-3. BLOCK DIAGRAM — AUDIO SECTION —

913

2

1

14

3

12

71

AUDIOI/F

CONTROLLER

AUDIOI/F

CONTROLLERCLOCK

DIVIDER

OPT CONTROLSWITCH

Q302

A/DCONVERTER

&HPF

IPGAINAMP

29 30 215 192 191 193 183 218 240

142

22

21

15

2

4

24

23

1311

69

234 1

219 24 25

70

17 18

MUTING BEEP

BIAS

STANDBY

REFERENCEVOLTAGE

SWITCHINGQ301

10

179180181

9

SYSTEMCONTROL/POWERSECTION

RMC KEY6

SYSTEMCONTROL/POWERSECTION

3

SYSTEMCONTROL/POWERSECTION

X MIC DET4

SYSTEMCONTROL/POWERSECTION

VC B+5

SERVOSECTION

ADDT

DIN1

1

OPTICALRECEIVER

J301LINE IN

(OPTICAL)

J303MIC

(PLUG IN POWER)

(LINE IN JACK)

J302

F801

i

RVDDDTCKKEY-RRGND

X80145.1584MHz

SDI0SDO0SCK0

SDI0

SDO0

SCK0

SI0

XBCK

XCS

NV

LRCK

XCS

ADA

XPD

ADA

OSCI

OSCO

FS25

6

AOUT

LAO

UTR

XOPT

CTL

OPT

DET

XJAC

DET

MUT

E

XHP

STBY RMC DTCK

VREF IN

OUTB BEEP

OUT R

OUTA BEEP OUTL

XMIC

DET

BEEP

MUT

E

STBY

BEEP

SO0SCK0

SYSTEM CONTROLLER,DIGITAL SIGNAL PROCESSOR

16M BIT D-RAMIC801 (2/3)

14

12

SDTO

BCLK

LRCK

15 CSN

16 PDN

CDTICCLK

SDO0SCK0

SDO0SCK0

MCL

K

A/D CONVERTERIC301

VIF B+

LIN2LIN1

RIN2

RIN14

OUT1

OUT2

IN1

IN2

STBY

MIC AMPIC303

INL

INR

HEADPHONE AMPIC302

DO DI SK XCS

EEPROMIC804

MAIN BOARD (2/3) AUDIO SECTION

203 204

13

Signal path : PLAYBACK : REC (ANALOG) : REC (DIGITAL)

(Page 31)

(Page 33)

(Page 33)

(Page 33)

(Page 33)

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MZ-G755

33 33

6-4. BLOCK DIAGRAM — SYSTEM CONTROL / POWER SECTION —

187206205

11314227

170

230

3

48

10

2086

10

25

169236235234171819

S805(HALF LOCK)

15

21

141

164

165

8

11

39

36

12

34

32

50

33

47

56

5452

551

32

553

5

3

46

8

12

15

2

13

1

10911714

16

MAIN BOARD (3/3) SYSTEM CONTROL/POWER SECTION

SDO0

SCK0AUDIO

SECTION 3

RMC KEYAUDIO

SECTION 6

X MIC DETAUDIOSECTION

VC B+

V+MIC AMP(IC303)

B+

AUDIOSECTION

CLK

VREFSERVO

SECTION 2

4

5

RESETSWITCH

Q801

SWITCH&

LCD MODULEUNIT

MICDETECTQ1008

DC-DCCONVERTER

IC1006

VIF B+

VB B+

CONVERTERIC1003

VOLTAGEDETECTIC1005

VOLTAGEDETECTIC1004

VRECOOVER WRITEHEAD DRIVE

CIRCUITB+

VOLTAGEDETECTIC1002

10 1115 14

SWITCHINGREGULATOR B+ SWITCH

Q603

BATTERYCHARGER

&REGULATOR

CHARGECONTROL

CHARGEMONITOR

SYSTEMCONTROL

(2/2)

STEP-UP DOWNPRE DRIVER

&PWM

SWITCH

54

51

55237238

16171

2221

4948

45

47

46

44

56

50

BANDGAPREFERENCE

SERIESPASS

REGULATOR

SWITCHINGREGULATOR

REGULATOR

SWITCHINGREGULATOR

STEP-UPPRE DRIVER

&PWM

RESET SIGNALGENELATOR

STEP-UPDC/DC

CONVERTER

REGULATOR

911

1819

16

SWITCH

35

22

23

26

27

46

47

NOISEFILTER

NOISEFILTER

NOISEFILTER

20

8269

19

16

24 STEP-UPPRE DRIVER

&PWM

LINEFILTERT601

RMC KEYFS4

FFCLRSLEEPVLONPLAY

REC KEYHALF LOCK SW

STOP

AVDD

LCD RST AUXLCD STBXCS LCD

PAUSE KEYSET KEY1SET KEY2XHOLD SW

OPEN CLOSE SW

PROTECT

XTEST

AUXI

VB MON

TSB MST VDD

VL PWM

VC PWM

XRST

CHG MON

CHG GAINCHG

HIDC MONGND SW

CLK SEL

R1029

Q1007

L801

D1003 Q1009

D1002

Q1010

VB

VG

VC

VC

VB

Q1001

L1002 L1001 D1001

D1004

Q1003

Q1004

Q1002

Q1006

Q1005

S806OPEN/CLOSE

DETECT

S803PROTECTDETECT

SL801(TEST)

VIF B+

VB B+

CN801

SDO0SCK0

RSTSTBCS

REC

PLAYSTOP

HOLD

DVDD

PAUSESET KEY1SET KEY2

VIF B+

R1031

R1032

6

VLLASER APC CIRCUIT

B+

L904

CLKCLK SELFFCLRSLEEPVLONXWK1XWK2XWK4VAIFON

VSTB

VLD

VREF

DTC2

DTC1

VDFBVD

VIFFBVIF

VA

VCO

INM2

RF2

INM1

RFI

XRST

CRST

VRECO1VRECO2

VREC

INM1

RF1

VI0VC2VC

GAINCHG

CHGMON

VB

VC

VRMCXWK3

SYSTEMCONTROL

POWER CONTROLIC901

44

42

41

38

RF2

VC2

VCVC

VOUT

L1 1L1 2

DW BTDW TP

RF2

INM2INP2

RS

CHG SW

VBBATM

DREG

DCIN

L1

L1

VB

VG

LG

L2

L2

VL

VL

45

D902

D903

L902

L905

VBHEADPHONEAMP (IC302),MOTOR/COIL

DRIVER (IC551)B+

L901D901

L601

VGMOTOR/COIL

DRIVER (IC551)POWER CONTROL

(IC601)B+

28

CHARGECONTROLQ602 (2/2)

VIF B+

D605

D603

CHARGE

CHARGECONTROLQ602 (1/2)

TH601

GROUND LINESWITCHING

Q601

VIF B+

36 VGVG B+

VC B+

L602

POWERCONTROL

IC601 (2/2)

SYSTEM CONTROLLERIC801 (3/3)

DTC1

D904

VIFA/D CONVERTER (IC301),

RF AMP (IC501)SYSTEM CONTROLLER (IC801)

EEPROM (IC804)B+

VAA/D CONVERTER (IC301),

SYSTEM CONTROLLER (IC801)B+

VCREMOTE CONTROL CIRCUIT

B+

VDSYSTEM CONTROLLER (IC801)

B+

RECHARGEABLEBATTERY

(NICKEL-CADMIUM)NC-WMAA

1.2V 1400mAh

J601DC IN 3V

!

49

43

(Page 31)

(Page 32)

(Page 32)

(Page 32)

(Page 32)

Page 34: MZ-G755 - minidisc.org · MZ-G755 SECTION 1 SERVICING NOTE NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT The laser diode in the optical pick-up block may suffer electro-static

MZ-G755

3434

1

A

B

C

D

E

F

G

H

I

J

2 3 4 5 6 7 8 9 10 11 12 13 14

OPTICALPICK-UPBLOCK

(LCX-4R)

R1011

C1003L1005

R1042 R1001 R1016

R1023C1004R1007R1008

R1005C1002

R1035

L906

L602R609

Q603

Q1008

R840

D803

D607

R611R610 C628

R839R834

C801

C825

C606

R603

C605

C604

C603

C612

C632

C611

C624

C615

R814

F801

C316

R105

J302 (1/2)

J301 (1/2)LINE IN

(OPTICAL)

T601 TP606TP317

TP315

TP314TP901(VC)

TP912(GND)

TP313

TP312

TP311

TP345

TP344

TP341TP343

TP336TP338

TP337

TP333(D-IN)

TP332(DGND)

TP331(DVCC)

AP555AP557

AP550

AP566

AP553 AP551

TP1003

AP556

AP558

AP502

AP560

AP587

AP58

3

AP56

3

AP50

1

AP56

8

TP339

MAIN BOARD (SIDE A)

TP335

TP1002

TP605

S805(HALF LOCK)

TP604

TP1004TP1001

AP586

TP801

TP334

TP342

TP518

TP902(VL)

TP505

TP519

TP501

TP512

TP316TP306

TP307L9

05

C518

C909

C910

C912 C9

13

R941

R947

C524

L501

R907R908R921

R914

D904

C902

R909

R917

AP906R910

C556

C529C553

C554

RB553

C512

C557C558

C559

C561

C555

L904

C904

R521

R519

Q501

L502

CN501C522

L301

L552

L801

D1003

D1002

Q1010D1004

C822

C830

C818R807

C810

C811 C827

C823

L802

C804

R836

L551

C104

C204

L902

L901

L601

C630

C101

2

R103

3R1

034

FB804 FB802

R100

9

R104

9

R103

0

R100

6

R101

0

R102

2R1

017

R102

1

R101

9R1

018 1

1 3 5 7

2 4 6 8

5

8

4

1

4

5

321

E C

31 2

1

2

31

2

3

IC1003

Q1002

IC1002IC1005 IC1004

Q1005

BE

C EB

C

Q1004B

D603

R607

R619

R602

C926

C919

R601

D601Q601

C920

R915

C602

56 50 45 43

5

10

15 20 25 2829

35

4042

IC551

IC804D

S

G

BC

E

B C E

AP830

TP603

AP907

AP831

1

4

8

5

1

5

10

15

20

R815R831 C521

R830

GD

S

(RVCC)

(DTCK)

(KEY-R)

(RGND)

11(11)

S806(OPEN/CLOSE DETECT)

TP(+)

TP(–)

1-679-264-

6-5. PRINTED WIRING BOARD — MAIN SECTION —

Note:• Y : parts extracted from the conductor side.• : Pattern from the side which enables seeing.

(The other layer’s patterns are not indicated.)

surface

Lead layout of conventional IC CSP (chip size package)

Caution:Pattern face side: Parts on the pattern face side seen from the(Side B) pattern face are indicated.Parts face side: Parts on the parts face side seen from the(Side A) parts face are indicated.

• Main board is four-layer printed board.However, the patterns of layers 2 and 3 have not been in-cluded in this diagrams.

* Replacement of IC801 on main boardrequires a special tool.

• Lead LayoutsD601 I-8D603 I-6D607 J-4D803 G-4D904 I-7D1002 F-2D1003 E-3D1004 E-2

IC551 D-6IC804 E-4IC1002 D-3IC1003 C-3IC1004 D-4IC1005 D-4

Q501 F-8Q601 J-7Q603 I-3Q1002 D-3Q1004 D-4Q1005 D-5Q1008 H-4Q1010 E-2

• SemiconductorLocation (SIDE A)

Ref. No. Location

Page 35: MZ-G755 - minidisc.org · MZ-G755 SECTION 1 SERVICING NOTE NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT The laser diode in the optical pick-up block may suffer electro-static

MZ-G755

35 35

D101 I-11D201 J-11D301 H-12D602 I-9D605 I-5D606 I-2D608 J-2D901 I-8D902 G-9D903 H-8D1001 D-3D1005 H-3

IC301 E-9IC302 H-11IC303 F-10IC501 F-7IC601 I-4IC801 F-4IC805 E-6IC901 H-8IC1006 I-2

Q301 H-10Q302 D-10Q602 I-6Q604 I-2Q605 I-2Q801 H-5Q1001 D-3Q1003 D-4Q1006 D-5Q1007 H-7Q1009 H-4

• SemiconductorLocation (SIDE B)

Ref. No. Location

1

A

B

C

D

E

F

G

H

I

J

234567891011121314

L1004

L554

MDMECHANISM

SWITCH&

LCD MODULE UNIT

HR601OVERWRITEHEAD

L553

L100

3

L100

2

D201

D101

D602

D901

CN801

D903

D1001

C821

Q1001

FB803

C1007

Q1003

Q1006

C1009C1011

C101

0

C101

6

C100

5

C100

6

C815

X801

SL801(TEST)

C809R816

C631

R1014

C1008

R1029C802IC801

R802

R803

R808R823

R824

R810

Q801

C915

R606D605Q602

D608

D606R613C607

R812

R1026

R1047

Q1007

C914

C906

C922 R905C905R903

C334C206

R206

C331

R106

R104R107R103R102

R205

C310

R202R303R203

Q301

C311

IC302IC901

R204R207

C307

IC303

IC301

C302 C306

R507

SL505

AP522

AP520

C505C506C507

C510C511C513

C527C514

C819

C820

C803

IC805

C806C501 C502 C509

C508C118

R118

R302

Q302

R112R111

C211

R317 C325

C216

R301C217

C112

C110

TP601

AP903

C552

C551

C201

FB304

FB303

FB805

C336

FB301

FB302

J601DC IN 3V

C312

C205

D301

C105

C918

C907

R604

R605

C826

R624

D1005

Q1009

C523

C315

C326

R936 R906

C805R804

C619C618

C608

R620

C614C613

C816R837

R822

R817

R103

9

L303

C318

C323

C113

C332

C322

C213

C314

C901C9

11

C903

C622

C623 Q605 Q604

IC601

C610

C609

RB801

C317

C320

C324

C335

C301

C305

C117

C210

C212

C101

C807

C808

R806

C812

R809

C813

C817R8

21R8

25

R835

R911

R946

D902

R948

R103

2R103

1

TH60

1

C633

C908

C921

R902

C601

R309

R311

R218

C309

C218

R319

C327

C202

C319

C116

C321 C3

40

R211

C111R3

18

C308

RB55

2

RB55

1

R305

R304

R310

R501

C503

C504

R517

C519

R307

C330

R212

C102

C627

C106

R306

R505

C530

C924

C917

R608

C621 C6

29

R621

R841

R805

R828

C828

R829

C516

C515

C616

R801

C814

FB80

1

L1001

GD

S

5 41 2 3

GD

S

GD

S

CE B

CE BAP904

AP909

AP910

AP521

AP517AP801

AP844

AP602

AP601

AP820

AP834

AP832

AP833

AP816

AP817

AP828

AP606

AP847

AP536AP511

AP842AP802

AP532

AP835

TP602

AP829

AP531

AP901

TP611TP610

AP81

8

AP90

2

AP53

4AP

533

AP81

5

AP90

8

GD

DS

G

S

4

5

321

15101415

20

25

28

56

50

45

4342403529

1 5 10 16

15 10

CN502

5 1

1

61

23

18

13

4

57 12

24 19

17

148

1

7

1

8

2

7

1

8

2

8

16

9

IC501

23

1

5

10

15

2022

30

35

40

44

AP57

0

AP57

7

AP57

8AP

579

AP50

3 AP57

6AP

575

AP57

4

AP57

3

AP57

2

AP57

1

AP81

4

AP823

AP53

7AP

529

AP530

AP803

AP841

AP52

7

SL506

AP843

AP840AP805

AP821AP528

AP526

AP845

AP846

AP80

9

AP81

0AP

808

AP80

7

AP80

6

AP84

8

AP58

4

AP56

5AP

564

AP58

5

AP58

1AP

580

AP50

4

AP52

4

AP52

3

AP569

AP525

AP804

AP559

AP567

AP822

AP535

AP554AP552

1

1

17

28

234

8765

42 40 35 29

58

41

14

8510 14

15

20

25

2843

45

50

56

1 5

3 4

IC1006

MAIN BOARD(SIDE B)

MOTOR FLEXIBLEBOARD

11(11)

S803(PROTECT DETECT)

(GND) (R)

(L)

(XMICDET)

(MIC GND) (MIC R)

(MIC L)

(XJDET)

(AGND)

(OPTDET) (LINE R)(LINE L)

1-679-372- 11

RECHARGEABLE(NICKEL CADMIUM)

NC-WMAA1.2V 1400mAh

CSPCHIP SIZE PACKAGE

MIC(PLUG IN POWER)

J303

J302 (2/2)

LINE IN(OPTICAL)

J301 (2/2)

!

i

1-679-264-

*

Page 36: MZ-G755 - minidisc.org · MZ-G755 SECTION 1 SERVICING NOTE NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT The laser diode in the optical pick-up block may suffer electro-static

MZ-G755

3636

Common note on Schematic Diagram:• All capacitors are in µF unless otherwise noted. pF: µµF

50 WV or less are not indicated except for electrolyticsand tantalums.

• All resistors are in Ω and 1/4 W or less unless otherwise

specified.• % : indicates tolerance.• C : panel designation.

• A : B+ Line.• Total current is measured with Minidisc installed.• Power voltage is dc 3V and fed with regulated dc power

supply from external power voltage jack.• Voltage and waveforms are dc with respect to ground

under no-signal conditions.no mark : PB( ) : REC< > : TUNER

∗ : Impossible to measure• Voltages are taken with a VOM (Input impedance 10 MΩ).

Voltage variations may be noted due to normal produc-tion tolerances.

• Waveforms are taken with a oscilloscope.Voltage variations may be noted due to normal produc-tion tolerances.

• Circled numbers refer to waveforms.• Signal path.

E : PBj : REC (ANALOG)l : REC (DIGITAL)

1

IC5018 (IY) (PB mode)

2

IC5019 (IX) (PB mode)

Approx.220mVp-p

3

IC501 q; (JX) (PB mode)

Approx.220mVp-p

• Waveforms

100mV/DIV, 1µs/DIV

100V/DIV, 1µs/DIV

100mV/DIV, 1µs/DIV

Approx.220mVp-p

4

IC501 qa (JY) (PB mode)

Approx.220mVp-p

100mV/DIV, 1µs/DIV

5

IC501 1 (TE) (PB mode)

Approx.35mVp-p

20mV/DIV, 500ns/DIV

6

IC501 ed (RF OUT) (PB mode)

500mV/DIV, 500ns/DIV

7

IC501 rs (FE) (PB mode)

10mV/DIV, 500ns/DIV

8

IC601 4 (CLK)

2.5Vp-p

5.8µs

1V/DIV, 2µs/DIV

9

IC901 th (CLK)

2.5Vp-p

5.8µs

1V/DIV, 2µs/DIV

Approx.1.3Vp-p

Approx.20mVp-p

Note:The components identi-fied by mark 0 or dottedline with mark 0 are criti-cal for safety.Replace only with partnumber specified.

Note:Les composants identifiés parune marque 0 sont critiquespour la sécurité.Ne les remplacer que par unepiéce portant le numérospécifié.

Page 37: MZ-G755 - minidisc.org · MZ-G755 SECTION 1 SERVICING NOTE NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT The laser diode in the optical pick-up block may suffer electro-static

MZ-G755

37 37

6-6. SCHEMATIC DIAGRAM — MAIN SECTION (1/3) — • Refer to page 36 for Common Note on Schematic Diagram and Waveforms, and refer to page 40 for IC Block Diagrams.

IC B/D

IC B/D

IC B/D

C561

C557

C558

C559

C512

C607 C606

R606

C618

C614

C616

C608

C505C506C507

C504

C503

C502

C508

C509

C510C511C513

R608

TH601

J601 C601

C529

R521

C524

C523

C530

R602

R603 C605

R607

C516

R619

C633

L554

L553

C611

R621

C610

C613

C612R620

C551

C552

C619C515

C555

C521

L502

RB552

RB551

Q603

C615R501

Q602

T601

IC551

RB553

R613C621

L501

R611

R610

R507 C501

C519

R51

7

R50

5

R519TPTP

C604

C602

R601

L601

CN501

CN502

AP501AP502AP503AP504

AP511

AP517

TP505

C518

AP523 AP524

AP532AP525AP527

AP535

AP526

SL505

SL506

AP528

AP529AP530

AP531

AP537

AP536

AP522

AP520TP605

TP604

C514

C603

C631

TP601

TP602

C627TP606AP903

R624

TP610TP611

AP570

AP571

AP572

AP573

AP574AP575AP576AP577AP578AP579

AP554

AP580

AP58

1

TP603

C632

C628

C629

C622

C623

C624

L602

AP601

AP606

AP584

AP56

4AP

565

AP585

AP56

3

AP555AP556AP557AP558

AP550AP559AP560AP587AP586

AP55

3AP

566

AP56

7AP

568

AP56

9AP

583

AP551AP552

AP534

AP533

AP521

C527

TP501

C609

L551L552

C522

C556

TP512

TP519

TP518Q501

D601

Q601

D602

C630 D603

R604 R605

D605

D60

6

Q604 D608

R609

D607

C553C554

Q605

IC501

IC601

(Page 38)

Page 38: MZ-G755 - minidisc.org · MZ-G755 SECTION 1 SERVICING NOTE NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT The laser diode in the optical pick-up block may suffer electro-static

MZ-G755

3838

6-7. SCHEMATIC DIAGRAM — MAIN SECTION (2/3) — • Refer to page 36 for Common Note on Schematic Diagram and Waveforms, and refer to page 41 for IC Block Diagrams.

IC B/D

S806

C816R823R

806

X801

C911

R830

L905

D903

R903 C905

R902

R82

2

C814R809

R817R808

R829

C920

R911

C801

C823

C908

C907

R910

C812

C813

C914

L904R807

C802

C804

R824 R825

L802

R828C820C819

C810

C811

C808C807SL801

S803

R814L801

C818C8

22

C805

R80

1

L901

L902

C806

R909

C921

AP84

2AP

841

AP840

AP82

1AP

822

AP82

3AP83

5

AP82

8AP

829

AP80

1AP

802

AP80

3AP

804

AP80

5

C825

AP848AP806AP807AP808AP810AP809AP814

C821

FB804 R831FB803 R816FB802 R815

R834

R839R836C830

S805

AP83

3AP

834

AP81

5AP

816

AP817

C827

AP83

2TP

801

R1029

C809

R803

R802

AP843

AP844AP845

AP820

AP846

AP847

R837

AP901

AP909AP908AP902

C924

C912

C910C909

AP904

C918

R941C926

AP907 AP906

R917

R946

C901

R915

IC901

R947R948

R936

R914

R906

L906

R907 R908

C913

C904

R1030

R804 R805C8

03

R84

0

IC80

5

R841C828R810

D803

R835

D904 C902D901

TP901

TP912

D902

C903

TP902

AP910

D1003

R821

C815

C917C915

C922

R812

IC801

IC804

C817

R921

R905C906

C919

FB80

1

(Page 37)

(Page 39)

(Page 39)

Page 39: MZ-G755 - minidisc.org · MZ-G755 SECTION 1 SERVICING NOTE NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT The laser diode in the optical pick-up block may suffer electro-static

MZ-G755

39 39

6-8. SCHEMATIC DIAGRAM — MAIN SECTION (3/3) — • Refer to page 36 for Common Note on Schematic Diagram and refer to page 40 for IC Block Diagrams.

IC B/D

IC B/D

IC B/D

IC B/D

IC B/D

IC B/D

IC B/DJ301

J303

J302

RB801

R1021

R1019

R1018

IC1004

R1017

C1011

R1016

R1023

C1007

C1010

R1014

C1005 C1006

C1004

R1010

R1011

R1007

R1008

R1009

R1042R1005

C1002

R1006

L1001

L1005

C1009

C1008

L1004

R1022

Q1001

L1002 R1001

C336C331

C334C206

C106

C320

R306

R309R207

R107C316

C105

R106C104 C204

C205

R206

C314

R303

FB303

Q801

FB805

AP830AP831

R1031R1032

C327C218

C118

R319

C117

C217

C116

C216 C213 C322 C332

R301

C309C113

C112

C323

C324

R118

R218

R317

R318

R112R212

C326

C325

C211 C111

C110C210

L1003

R1047

L303

C317 C318

C319

IC1006

C310

R302C330

R307

D1002

C340 C321

R311F801

R305

R304

L301C307

C335

C302

C306

C202

C102

C1012 R1033

C1016

C305

C301

R1026

R1049

TP341

TP342

TP343

TP344

TP345

TP331

TP332

TP333

TP334

TP335

TP336 TP338

TP337

TP339R111R211

C308

TP30

6

TP30

7

R104

R204

C201

C101

R20

2R

102

C312FB302

FB304

TP311TP312TP313TP314TP315TP316TP317

C311R105 R205

C826

CN801

R1035

TP1003

IC1005

C1003TP1001

TP1004

TP1002

IC1002

Q1006

D1005

IC301

IC1003 Q1003D1001

Q1004

Q1002

Q1005

Q1009

R1034

D301

D101

D201

FB301

Q301

C212

IC303

Q302

Q1010

Q1008

R310

R203

R103

C315

IC302

R1039

D1004

Q1007

(Page 38)

Page 40: MZ-G755 - minidisc.org · MZ-G755 SECTION 1 SERVICING NOTE NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT The laser diode in the optical pick-up block may suffer electro-static

MZ-G755

4040

6-9. IC BLOCK DIAGRAMS

IC501 SN761057ADBT

1TE

REXTWpp LPF

VREF

C

D

D-C

Iy

Ix

Jx

Jy

A

A-C

B

ADIP-IN

FE

ABCDOFC-1OFC-2

PS

LPEQAGND

RF OUTCCSL2VC

XRSTSCKSBUS

VREF075PEAKBOTM

DGND

OFTRK

S-MON

TON-CCIG

CDN

ADIPDVDD

PD-IPD-NIPD-O

4344

TWppPK/BTMAwCSLOVREF075A-CD-CMalfaMijAwBPFDwDwBPF

42

39AVCC38

37363534

31302928

27

26

252423

4041

23

4

5

6

7

8

9

10

11

12

13

14

151617181920

2122

A+B+C+DI+J

NPPTONCSL

Aw+DwTON PeakTON Botm

ADIPTE

TEMP

3332

S-MONITOR

TE

RF

FE

APC

ADIP

T-ON

SERIALI/F

PEAK/BOTM

OF TRK

ABCD

Tpp/Wpp

IC1002 XC61CN1102MRIC1004 XC61CN1702MRIC1005 XC61CN1002MR

21 3VSS VINVOUT

VREF

IC1006 XC6371C271PR

123

VLXLIMITER

PWM/PFWCONTROL

OSC

BUFFER

PHASECOMP

VREF

SLOWSTART

CHIP ENABLE

54EXT VSS

CE NCVOUT

VDD

IC551 SC111257FCR2

43

PRE

DRIV

ER

PRE DRIVER

+–

48

47

44

45

46

49

50

51

+–52

+–53

54

55

56

1 2 3 4 5

42 41 39 373840

+–

+–

6

3PHASECONTROL

35 34 3336 31 30 2932

8 9 107 12 13 14

15

11

H-BRIDGECONTROL

PRE DRIVER

H-BRIDGECONTROL

2627

28

24

23

22

21

20

25

1716

1819

VC

VC

VG

VG

VC

VC VC

H-BRIDGECONTROL

H-BRIDGECONTROL

VC

VG

VC

VC

VC VG

PRE DRIVER PRE DRIVER

VC

VC

VG VC VG

BIAS

PGNDW

UO

PGNDUV

WO

VMVW

VO

VMU

GND2

CPWI

CPVI

CPUI

COM

CPWO

CPVO

CPUO W

I VI UIPW

M OE RO1

PGND

1

FO1

VM1

RO2

PGND

2

FO2

VM12

VM2

FI4RI4

VM4

FI3

VG

VC

GND1

PWM24

RI3

FI2RI2

RI1FI1

CPAI

PCP

AIM

CPBI

M

CPBO

CPAO

CPBI

P

RO3

PGND

3

FO3

VM3

RO4

PGND

4

FO4

VM34

IC303 NJM2173AV(TE2)

REG

GV

14 13 12 11 10 9 8

1 2 3 4 5 6 7

OUT2DC

CUT2MICV+2IN2 GV STBY V+

OUT1 DCCUT1

MICV+1

IN1 REG NOISE GND

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41

MZ-G755

2930313233343536373839404142

43

44

45

46474849

50

51

52

545556

1

53

2 3 4 5 6 7 8 9 10 11 12 13 14

15

16

17

18

19

20

21

22

24

23

25

26

2728

VB

BATM

CHGSW

RSINP2INM2

RF2

DCIN

CHGMON

SVREF

GAINCHG

DREG

GND

SWRE

CON OE CLK RI FI

EFM

VIO VC

VREC

O1 LI 1

PGND

1

PGND

1

LI 2

VRECO2

VREC

DTC

INP1

INM1

RF1

DW TP

DW BT

CVREF

GND

VREF

VC2

C1LC1H

VG2

C2L

C2H

VG3

HAPGND

3

HBVGVREC

IN2

OUTB

PGND

2

PGND

2

OUTA

VREC

IN1

OUTPUT SW

CONTROL

OUTPUT SW

CONTROL

PWM

SYSTEM

OUTPUT SW

CHARGECONTROL

DC INDETECT

DC INBANDGAP

HI-BRIDGEPRE DRIVER

EFMPRE DRIVER

CHARGEPUMP 2

CHARGEPUMP 1

VREFBUFFER

SET-UP DOWNPRE DRIVER

LEVELSHIFT

VC AMP

CHARGEMONITOR

X2/X4

BATTERYCHARGER

&REGULATOR

VC VG DC IN

DC IN

DC IN

DC IN

DC IN

VIO

VIO VC

VC

VC

VC VC2

VC2 VG

VCVG

VG2

SW

VGCVG3

VG3VG2VG

VC

VG3

IC601 XPC18A22AFCR2

IC901 XPC18A32FCR2

42 41 40 39 38 36 35 34 33 32 31 30 2937

28

27

26

25

24

23

22

21

20

191817

16

15

1413121110987654321

5655545352

51

50

49

48

47

46

4544

43

+–

+–

CLKSLEEPFFCLR

VAIFONCLKSEL

GND

VB

VREF

RSTREF

CRST

XRST

VC2VD

NC

PGND

2

PGND

2L2VLVLOVL

GND

VRM

C

VSTB

XWK4

XWK3

XWK2

XWK1

VLON

L1

RF1

INM1

DTC1

DTC2

RF2

INM2

PWM1

PWM2

VGLGPGND2

L2

NC

VIF

VA VAFB

VDFB

VIFF

B

VC VCO

VC VC O

UTL1 NC PG

ND1

PGND

1

GND

SERIES PASSREGULATOR VA

SERIES PASSREGULATOR VD

POWERSWITCH 2

STEP-UPPRE DRIVER

STEP-UPPRE DRIVER

POWERSWITCH 1

OUTPUTSW

PWM

START-UP

PWM

OUTPUT SW

SERIES PASSREGULATOR VIF

BANDGAPREFERENCE

OUTPUT SW

SYSTEMCONTROL

STEP-UPDC/DC

CONVERTEROUTPUT

SW

OUTPUT SW

OUTPUT SW

VC VC VC

VC

VC

VC

VSTB

VSTB

VB

VG VG

VB VB VC VG

VG

VGVCVB

VGVC

Page 42: MZ-G755 - minidisc.org · MZ-G755 SECTION 1 SERVICING NOTE NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT The laser diode in the optical pick-up block may suffer electro-static

42

MZ-G755

V REFMTSW

BSTSW

BEEP

19

20

21

22

23

24

18 17 16 15 14 13

PWSW 12

11

10

8

7

BST1

9

BST2

654321

BSTAGC

PWB

PWA

ADD

TCMT

VCC

IN R

IN L

OUTB

OUTA

+B

OUT

L

PW G

ND

OUT

R

DET

AGC

IN

BST

NF2

LPF2

NF1

LPF1

VREF

VREF

IN

GND

BEEP

BST

SW

MUT

E

STB

BEEP

BEEP

1

13

2

5 VCON

VA

SDTO

BCLK

MCLK

LRCK

CDTICCLKCSN

PDN

VA

RIN2

RIN1

LIN2

LIN1

VD

AGND

VCON

VD

6

7

8

34

IPGAADC AUDIO I/F

CONTROLLERHPF

1415

16

CONTROLREGISTER

I/F

CLOCK DIVIDER

12

11

10

9

IC301 AK5354VT-E2

IC302 TA2131FL(EL)

Page 43: MZ-G755 - minidisc.org · MZ-G755 SECTION 1 SERVICING NOTE NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT The laser diode in the optical pick-up block may suffer electro-static

43

MZ-G755SECTION 7

EXPLODED VIEWS

NOTE:• The mechanical parts with no reference

number in the exploded views are not supplied.• Items marked “*” are not stocked since

they are seldom required for routine service.Some delay should be anticipatedwhen ordering these items.

• -XX and -X mean standardized parts, sothey may have some difference from theoriginal one.

• Color Indication of Appearance PartsExample :

KNOB, BALANCE (WHITE) ... (RED)

Parts Color Cabinet’s Color

• Accessories are given in the last of this parts list.• Abbreviation

CET : East European & CSI modelFR : French modelJE : Tourist modelAUS : Australian modelKR : Korean modelHK : Hong Kong model

Ref. No. Part No. Description Remark

7-1. PANEL SECTION

Ref. No. Part No. Description Remark

R R

12

2

34

1314

5

6

2

2

9

6

7

8

10

11

12

not supplied

1 X-3381-862-1 PANEL ASSY, UPPER2 4-218-233-17 SCREW (1.7), MI3 3-222-892-11 SPRING (HOLD), TORSION4 3-222-893-01 SPRING (REC), TENSION5 1-476-305-11 LCD MODULE

6 3-318-382-91 SCREW (1.7X2.5), TAPPING7 3-222-917-01 BUTTON (OPEN)

8 X-3381-861-1 PANEL ASSY, BOTTOM (AEP,UK,FR,CET)8 X-3381-863-1 PANEL ASSY, BOTTOM (E,AUS,JE,KR,HK)9 3-242-777-01 SHEET (GROUND)10 3-242-776-01 PLATE (SHIELD)11 3-244-236-01 SHEET (INSULATION)

12 3-230-524-01 SHEET (CASE)13 3-231-133-01 SHEET (C), LCD14 3-244-732-01 SPACER (WINDOW)

The components identified bymark 0 or dotted line with mark0 are critical for safety.Replace only with part numberspecified.

Les composants identifiés par unemarque 0 sont critiques pourla sécurité.Ne les remplacer que par une piéceportant le numéro spécifié.

Page 44: MZ-G755 - minidisc.org · MZ-G755 SECTION 1 SERVICING NOTE NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT The laser diode in the optical pick-up block may suffer electro-static

44

MZ-G755

51

5255

54

53

5657

58

59

56

60

6162

MT-MZR700-172

7-2. CHASSIS SECTION

Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark

@

51 X-3379-555-3 CHASSIS ASSY, SET52 3-222-779-11 SPRING (OPEN), TENSION

* 53 A-3323-652-A MAIN BOARD, COMPLETE54 3-222-780-01 SPRING, TORSION55 4-218-233-09 SCREW (1.7), MI

56 3-335-797-01 SCREW (M1.4X2), TOOTHED LOCK

57 3-318-382-01 SCREW (1.7X3), TAPPING58 3-222-837-01 SPRING, BATTERY COIL59 3-222-838-01 ARM60 X-3379-899-2 CASE ASSY, BATTERY61 3-242-775-01 SHEET (JACK)

62 3-243-698-01 CUSHION (IC)

Page 45: MZ-G755 - minidisc.org · MZ-G755 SECTION 1 SERVICING NOTE NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT The laser diode in the optical pick-up block may suffer electro-static

45

MZ-G755

M603

M601

M602

101

102

105

106

107108

109115

121

120119

118

117

103

104

110

122

111

109

112

103

109

114113

115

109

116

103

A A

B

B

7-3. MD MECHANISM DECK SECTION(MT-MZR700-172)

Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark

The components identified bymark 0 or dotted line with mark0 are critical for safety.Replace only with part numberspecified.

Les composants identifiés par unemarque 0 sont critiques pour lasécurité.Ne les remplacer que par une piéceportant le numéro spécifié.

101 X-3379-515-2 HOLDER ASSY102 3-224-779-02 SPRING, THRUST DETENT103 4-963-883-42 SCREW (M1.4), PRECISION PAN104 X-3379-514-1 CHASSIS ASSY105 4-222-218-02 GEAR (HD)

106 4-222-223-01 SHAFT, SUB107 4-222-226-01 SPRING (EJECT), TENSION108 4-222-222-01 GEAR (RACK)109 3-338-645-31 WASHER (0.8-2.5)110 X-3380-408-1 CHASSIS ASSY, GEAR

111 3-222-545-01 GEAR (HB)112 4-224-885-01 SCREW (M1.2X1.5)113 4-222-215-01 GEAR (HC)

114 1-679-372-11 MOTOR FLEXIBLE BOARD115 4-963-883-31 SCREW (M1.4), PRECISION PAN116 4-222-216-01 GEAR (SA)117 4-222-208-01 GEAR (SB)118 3-043-237-02 BEARING (N)

119 4-222-203-02 SCREW, LEAD0120 X-3379-508-1 SERVICE ASSY, OP (LCX-4R)

121 3-049-336-03 SPRING (S), RACK122 3-222-544-01 GEAR (HA)M601 8-835-706-01 MOTOR, DC SSM18A/C-NP (SPINDLE)

(WITH TURNTABLE)

M602 1-763-399-11 MOTOR, DC (SLED) (WITH GEAR)M603 1-763-400-21 MOTOR, DC (OVER WRITE HEAD UP/DOWN)

Page 46: MZ-G755 - minidisc.org · MZ-G755 SECTION 1 SERVICING NOTE NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT The laser diode in the optical pick-up block may suffer electro-static

46

MZ-G755SECTION 8

ELECTRICAL PARTS LIST

NOTE:• Due to standardization, replacements in

the parts list may be different from theparts specified in the diagrams or thecomponents used on the set.

• -XX and -X mean standardized parts, sothey may have some difference from theoriginal one.

• RESISTORSAll resistors are in ohms.METAL:Metal-film resistor.METAL OXIDE: Metal oxide-film resistor.F:nonflammable

• CAPACITORSuF : µF

• COILSuH : µH

• Items marked “*” are not stocked sincethey are seldom required for routine service.Some delay should be anticipatedwhen ordering these items.

• SEMICONDUCTORSIn each case, u : µ, for example:uA.. : µA.. uPA.. : µPA..uPB.. : µPB.. uPC.. : µPC.. uPD.. : µPD..

• AbbreviationCET : East European & CSI modelFR : French modelJE : Tourist modelAUS : Australian modelKR : Korean modelHK : Hong Kong model

Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark

MAIN

The components identified bymark 0 or dotted line with mark0 are critical for safety.Replace only with part numberspecified.

Les composants identifiés par unemarque 0 sont critiques pourla sécurité.Ne les remplacer que par une piéceportant le numéro spécifié.

When indicating parts by referencenumber, please include the board.

* A-3323-652-A MAIN BOARD, COMPLETE*********************

3-222-837-01 SPRING, BATTERY COIL3-318-382-01 SCREW (1.7X3), TAPPING

< CAPACITOR >

C101 1-125-889-11 CERAMIC CHIP 2.2uF 10% 10VC102 1-164-942-11 CERAMIC CHIP 0.0068uF 10% 16VC104 1-135-868-11 TANTAL. CHIP 220uF 20% 2.5VC105 1-115-467-11 CERAMIC CHIP 0.22uF 10% 10VC106 1-164-937-11 CERAMIC CHIP 0.001uF 10% 50V

C110 1-125-837-11 CERAMIC CHIP 1uF 10% 6.3VC111 1-164-874-11 CERAMIC CHIP 100PF 5% 50VC112 1-125-837-11 CERAMIC CHIP 1uF 10% 6.3VC113 1-131-862-11 TANTAL. CHIP 47uF 20% 4VC116 1-164-937-11 CERAMIC CHIP 0.001uF 10% 50V

C117 1-125-891-11 CERAMIC CHIP 0.47uF 10% 10VC118 1-164-939-11 CERAMIC CHIP 0.0022uF 10% 50VC201 1-125-889-11 CERAMIC CHIP 2.2uF 10% 10VC202 1-164-942-11 CERAMIC CHIP 0.0068uF 10% 16VC204 1-135-868-11 TANTAL. CHIP 220uF 20% 2.5V

C205 1-115-467-11 CERAMIC CHIP 0.22uF 10% 10VC206 1-164-937-11 CERAMIC CHIP 0.001uF 10% 50VC210 1-125-837-11 CERAMIC CHIP 1uF 10% 6.3VC211 1-164-874-11 CERAMIC CHIP 100PF 5% 50VC212 1-125-837-11 CERAMIC CHIP 1uF 10% 6.3V

C213 1-131-862-11 TANTAL. CHIP 47uF 20% 4VC216 1-164-937-11 CERAMIC CHIP 0.001uF 10% 50VC217 1-125-891-11 CERAMIC CHIP 0.47uF 10% 10VC218 1-164-939-11 CERAMIC CHIP 0.0022uF 10% 50VC301 1-131-862-11 TANTAL. CHIP 47uF 20% 4V

C302 1-107-820-11 CERAMIC CHIP 0.1uF 16VC305 1-135-149-21 TANTAL. CHIP 2.2uF 20% 10VC306 1-107-820-11 CERAMIC CHIP 0.1uF 16VC307 1-125-777-51 CERAMIC CHIP 0.1uF 10% 10VC308 1-107-820-11 CERAMIC CHIP 0.1uF 16V

C309 1-119-923-81 CERAMIC CHIP 0.047uF 10% 10VC310 1-125-777-51 CERAMIC CHIP 0.1uF 10% 10VC311 1-125-777-51 CERAMIC CHIP 0.1uF 10% 10VC312 1-125-889-11 CERAMIC CHIP 2.2uF 10% 10VC314 1-135-259-11 TANTAL. CHIP 10uF 20% 6.3V

C315 1-125-837-11 CERAMIC CHIP 1uF 10% 6.3VC316 1-135-201-11 TANTAL. CHIP 10uF 20% 4VC317 1-104-847-11 TANTAL. CHIP 22uF 20% 4V

C318 1-131-862-11 TANTAL. CHIP 47uF 20% 4VC319 1-164-943-11 CERAMIC CHIP 0.01uF 10% 16VC320 1-135-151-21 TANTAL. CHIP 4.7uF 20% 4VC321 1-125-777-51 CERAMIC CHIP 0.1uF 10% 10VC322 1-131-862-11 TANTAL. CHIP 47uF 20% 4V

C323 1-135-259-11 TANTAL. CHIP 10uF 20% 6.3VC324 1-135-259-11 TANTAL. CHIP 10uF 20% 6.3VC325 1-164-937-11 CERAMIC CHIP 0.001uF 10% 50VC326 1-164-937-11 CERAMIC CHIP 0.001uF 10% 50VC327 1-164-937-11 CERAMIC CHIP 0.001uF 10% 50V

C330 1-107-820-11 CERAMIC CHIP 0.1uF 16VC331 1-164-937-11 CERAMIC CHIP 0.001uF 10% 50VC332 1-135-259-11 TANTAL. CHIP 10uF 20% 6.3VC334 1-125-777-51 CERAMIC CHIP 0.1uF 10% 10VC335 1-135-259-11 TANTAL. CHIP 10uF 20% 6.3V

C336 1-164-933-11 CERAMIC CHIP 220PF 10% 50VC340 1-125-777-51 CERAMIC CHIP 0.1uF 10% 10VC501 1-164-874-11 CERAMIC CHIP 100PF 5% 50VC502 1-127-772-81 CERAMIC CHIP 0.033uF 10% 10VC503 1-164-940-11 CERAMIC CHIP 0.0033uF 10% 16V

C504 1-164-940-11 CERAMIC CHIP 0.0033uF 10% 16VC505 1-164-943-11 CERAMIC CHIP 0.01uF 10% 16VC506 1-127-772-81 CERAMIC CHIP 0.033uF 10% 10VC507 1-127-772-81 CERAMIC CHIP 0.033uF 10% 10VC508 1-164-938-11 CERAMIC CHIP 0.0015uF 10% 50V

C509 1-164-940-11 CERAMIC CHIP 0.0033uF 10% 16VC510 1-164-850-11 CERAMIC CHIP 10PF 0.5PF 50VC511 1-164-850-11 CERAMIC CHIP 10PF 0.5PF 50VC512 1-125-777-51 CERAMIC CHIP 0.1uF 10% 10VC513 1-164-850-11 CERAMIC CHIP 10PF 0.5PF 50V

C514 1-107-819-11 CERAMIC CHIP 0.022uF 10% 16VC515 1-125-777-51 CERAMIC CHIP 0.1uF 10% 10VC516 1-125-777-51 CERAMIC CHIP 0.1uF 10% 10VC518 1-127-760-11 CERAMIC CHIP 4.7uF 10% 6.3VC519 1-164-940-11 CERAMIC CHIP 0.0033uF 10% 16V

C521 1-125-777-51 CERAMIC CHIP 0.1uF 10% 10VC522 1-125-777-51 CERAMIC CHIP 0.1uF 10% 10VC523 1-125-837-11 CERAMIC CHIP 1uF 10% 6.3VC524 1-135-259-11 TANTAL. CHIP 10uF 20% 6.3VC527 1-119-923-81 CERAMIC CHIP 0.047uF 10% 10V

C529 1-115-169-11 TANTAL. CHIP 10uF 20% 6.3VC530 1-164-939-11 CERAMIC CHIP 0.0022uF 10% 50VC551 1-125-837-11 CERAMIC CHIP 1uF 10% 6.3VC552 1-125-837-11 CERAMIC CHIP 1uF 10% 6.3VC553 1-104-912-11 TANTAL. CHIP 3.3uF 20% 6.3V

Page 47: MZ-G755 - minidisc.org · MZ-G755 SECTION 1 SERVICING NOTE NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT The laser diode in the optical pick-up block may suffer electro-static

47

MZ-G755

Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark

MAIN

C554 1-104-912-11 TANTAL. CHIP 3.3uF 20% 6.3VC555 1-135-211-11 TANTAL. CHIP 6.8uF 20% 6.3VC556 1-135-211-11 TANTAL. CHIP 6.8uF 20% 6.3VC557 1-127-772-81 CERAMIC CHIP 0.033uF 10% 10VC558 1-127-772-81 CERAMIC CHIP 0.033uF 10% 10V

C559 1-127-772-81 CERAMIC CHIP 0.033uF 10% 10VC561 1-125-777-51 CERAMIC CHIP 0.1uF 10% 10VC601 1-164-943-11 CERAMIC CHIP 0.01uF 10% 16VC602 1-125-777-51 CERAMIC CHIP 0.1uF 10% 10VC603 1-128-964-11 TANTAL. CHIP 100uF 20% 6.3V

C604 1-164-943-11 CERAMIC CHIP 0.01uF 10% 16VC605 1-164-937-11 CERAMIC CHIP 0.001uF 10% 50VC606 1-164-874-11 CERAMIC CHIP 100PF 5% 50VC607 1-164-874-11 CERAMIC CHIP 100PF 5% 50VC608 1-125-777-51 CERAMIC CHIP 0.1uF 10% 10V

C609 1-131-862-11 TANTAL. CHIP 47uF 20% 4VC610 1-104-851-11 TANTAL. CHIP 10uF 20% 10VC611 1-135-259-11 TANTAL. CHIP 10uF 20% 6.3VC612 1-135-259-11 TANTAL. CHIP 10uF 20% 6.3VC613 1-125-777-51 CERAMIC CHIP 0.1uF 10% 10V

C614 1-125-777-51 CERAMIC CHIP 0.1uF 10% 10VC615 1-137-760-11 MICA CHIP 100PF 5% 100VC616 1-125-777-51 CERAMIC CHIP 0.1uF 10% 10VC618 1-125-777-51 CERAMIC CHIP 0.1uF 10% 10VC619 1-125-777-51 CERAMIC CHIP 0.1uF 10% 10V

C621 1-164-943-11 CERAMIC CHIP 0.01uF 10% 16VC622 1-110-569-11 TANTAL. CHIP 47uF 20% 6.3VC623 1-131-862-11 TANTAL. CHIP 47uF 20% 4VC624 1-115-169-11 TANTAL. CHIP 10uF 20% 6.3VC627 1-125-777-51 CERAMIC CHIP 0.1uF 10% 10V

C628 1-164-943-11 CERAMIC CHIP 0.01uF 10% 16VC629 1-164-874-11 CERAMIC CHIP 100PF 5% 50VC630 1-113-690-11 ELECT CHIP 220uF 20% 4VC631 1-126-246-11 ELECT CHIP 220uF 20% 4VC632 1-135-259-11 TANTAL. CHIP 10uF 20% 6.3V

C633 1-125-777-51 CERAMIC CHIP 0.1uF 10% 10VC801 1-125-777-51 CERAMIC CHIP 0.1uF 10% 10VC802 1-164-943-11 CERAMIC CHIP 0.01uF 10% 16VC803 1-164-943-11 CERAMIC CHIP 0.01uF 10% 16VC804 1-125-777-51 CERAMIC CHIP 0.1uF 10% 10V

C805 1-119-923-81 CERAMIC CHIP 0.047uF 10% 10VC806 1-119-923-81 CERAMIC CHIP 0.047uF 10% 10VC807 1-164-850-11 CERAMIC CHIP 10PF 0.5PF 50VC808 1-164-850-11 CERAMIC CHIP 10PF 0.5PF 50VC809 1-135-259-11 TANTAL. CHIP 10uF 20% 6.3V

C810 1-125-837-11 CERAMIC CHIP 1uF 10% 6.3VC811 1-125-837-11 CERAMIC CHIP 1uF 10% 6.3VC812 1-164-943-11 CERAMIC CHIP 0.01uF 10% 16VC813 1-125-891-11 CERAMIC CHIP 0.47uF 10% 10VC814 1-164-935-11 CERAMIC CHIP 470PF 10% 50V

C815 1-131-862-11 TANTAL. CHIP 47uF 20% 4VC816 1-125-777-51 CERAMIC CHIP 0.1uF 10% 10VC817 1-125-889-11 CERAMIC CHIP 2.2uF 10% 10VC818 1-125-777-51 CERAMIC CHIP 0.1uF 10% 10VC819 1-127-772-81 CERAMIC CHIP 0.033uF 10% 10V

C820 1-127-772-81 CERAMIC CHIP 0.033uF 10% 10VC821 1-131-862-11 TANTAL. CHIP 47uF 20% 4VC822 1-125-777-51 CERAMIC CHIP 0.1uF 10% 10VC823 1-107-820-11 CERAMIC CHIP 0.1uF 16VC825 1-164-874-11 CERAMIC CHIP 100PF 5% 50V

C826 1-115-467-11 CERAMIC CHIP 0.22uF 10% 10VC827 1-117-919-11 TANTAL. CHIP 10uF 20% 6.3VC828 1-125-777-51 CERAMIC CHIP 0.1uF 10% 10VC830 1-125-777-51 CERAMIC CHIP 0.1uF 10% 10VC901 1-115-169-11 TANTAL. CHIP 10uF 20% 6.3V

C902 1-115-169-11 TANTAL. CHIP 10uF 20% 6.3VC903 1-128-964-11 TANTAL. CHIP 100uF 20% 6.3VC904 1-119-749-11 TANTAL. CHIP 33uF 20% 4VC905 1-125-777-51 CERAMIC CHIP 0.1uF 10% 10VC906 1-164-943-11 CERAMIC CHIP 0.01uF 10% 16V

C907 1-125-889-11 CERAMIC CHIP 2.2uF 10% 10VC908 1-125-777-51 CERAMIC CHIP 0.1uF 10% 10VC909 1-164-937-11 CERAMIC CHIP 0.001uF 10% 50VC910 1-164-937-11 CERAMIC CHIP 0.001uF 10% 50VC911 1-135-259-11 TANTAL. CHIP 10uF 20% 6.3V

C912 1-164-937-11 CERAMIC CHIP 0.001uF 10% 50VC913 1-164-941-11 CERAMIC CHIP 0.0047uF 10% 16VC914 1-125-777-51 CERAMIC CHIP 0.1uF 10% 10VC915 1-125-777-51 CERAMIC CHIP 0.1uF 10% 10VC917 1-125-777-51 CERAMIC CHIP 0.1uF 10% 10V

C918 1-125-889-11 CERAMIC CHIP 2.2uF 10% 10VC919 1-135-259-11 TANTAL. CHIP 10uF 20% 6.3VC920 1-135-259-11 TANTAL. CHIP 10uF 20% 6.3VC921 1-125-777-51 CERAMIC CHIP 0.1uF 10% 10VC922 1-164-937-11 CERAMIC CHIP 0.001uF 10% 50V

C924 1-164-937-11 CERAMIC CHIP 0.001uF 10% 50VC926 1-115-169-11 TANTAL. CHIP 10uF 20% 6.3VC1002 1-125-777-51 CERAMIC CHIP 0.1uF 10% 10VC1003 1-125-837-11 CERAMIC CHIP 1uF 10% 6.3VC1004 1-164-874-11 CERAMIC CHIP 100PF 5% 50V

C1005 1-110-569-11 TANTAL. CHIP 47uF 20% 6.3VC1006 1-110-569-11 TANTAL. CHIP 47uF 20% 6.3VC1007 1-117-919-11 TANTAL. CHIP 10uF 20% 6.3VC1008 1-117-919-11 TANTAL. CHIP 10uF 20% 6.3VC1009 1-117-919-11 TANTAL. CHIP 10uF 20% 6.3V

C1010 1-127-895-11 TANTAL. CHIP 22uF 20% 4VC1011 1-127-895-11 TANTAL. CHIP 22uF 20% 4VC1012 1-164-943-11 CERAMIC CHIP 0.01uF 10% 16VC1016 1-137-762-11 TANTAL. CHIP 10uF 20% 4V

< CONNECTOR >

CN501 1-573-360-21 CONNECTOR, FFC/FPC 20PCN502 1-573-355-11 CONNECTOR, FFC/FPC 15PCN801 1-573-356-21 CONNECTOR, FFC/FPC 16P

< DIODE >

D101 8-719-056-72 DIODE UDZ-TE-17-2.4BD201 8-719-056-72 DIODE UDZ-TE-17-2.4BD301 8-719-068-83 DIODE MAZL068D0LS0-TX/LD601 8-719-081-33 DIODE MA2YD1500LS0D602 8-719-081-33 DIODE MA2YD1500LS0

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Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark

@ Replacement of CXD2674-204GA (IC801) used inthis set requires a special tool.Therefore, it cannot be replaced.

MAIN

D603 8-719-081-33 DIODE MA2YD1500LS0D605 8-719-081-33 DIODE MA2YD1500LS0D606 8-719-081-35 DIODE MA2YD1700LS0D607 8-719-081-33 DIODE MA2YD1500LS0D608 8-719-081-35 DIODE MA2YD1700LS0

D803 8-719-017-58 DIODE MA8068D901 8-719-081-33 DIODE MA2YD1500LS0D902 8-719-081-33 DIODE MA2YD1500LS0D903 8-719-420-51 DIODE MA729D904 8-719-404-50 DIODE MA111-TX

D1001 8-719-072-27 DIODE MA2Z748001S0D1002 8-719-078-02 DIODE 1SS357(T3SONY1)D1003 8-719-081-33 DIODE MA2YD1500LS0D1004 8-719-059-50 DIODE MA3J142D0LS0D1005 8-719-081-33 DIODE MA2YD1500LS0

< FUSE >

F801 1-576-439-21 FUSE (SMD) (0.25A)

< JUMPER RESISTOR >

FB301 1-216-864-11 METAL CHIP 0 5% 1/16WFB302 1-216-864-11 METAL CHIP 0 5% 1/16WFB303 1-216-864-11 METAL CHIP 0 5% 1/16WFB304 1-216-864-11 METAL CHIP 0 5% 1/16WFB801 1-414-226-21 INDUCTOR, FERRITE BEAD

FB802 1-216-864-11 METAL CHIP 0 5% 1/16WFB803 1-216-864-11 METAL CHIP 0 5% 1/16WFB804 1-216-864-11 METAL CHIP 0 5% 1/16WFB805 1-216-864-11 METAL CHIP 0 5% 1/16W

< IC >

IC301 8-759-694-88 IC AK5354VT-E2IC302 8-759-598-15 IC TA2131FL(EL)IC303 8-759-825-56 IC NJM2173AV(TE2)IC501 6-701-391-01 IC SN761057ADBTIC551 8-759-698-62 IC SC111257FCR2

IC601 6-701-477-01 IC XPC18A22AFCR2@ IC801 8-753-000-20 IC CXD2674-204GA

IC804 8-759-445-94 IC AK6480AM-E2IC805 8-759-196-97 IC TC7SH32FU-TE85RIC901 8-759-698-61 IC XPC18A32FCR2

IC1002 8-759-830-82 IC XC61CN1102MRIC1003 8-759-657-26 IC XC6368B101MRIC1004 8-759-694-90 IC XC61CN1702MRIC1005 8-759-694-89 IC XC61CN1002MRIC1006 8-759-825-55 IC XC6371C271PR

< JACK >

J301 1-793-619-21 JACK (LINE IN (OPTICAL))J302 1-793-288-43 JACK (i)J303 1-794-084-12 JACK (MIC (PLUG IN POWER))J601 1-785-383-11 JACK, DC (POLARITY UNIFIED TYPE)

(DC IN 3V)

< COIL >

L301 1-414-398-11 INDUCTOR CHIP 10uH

L303 1-414-398-11 INDUCTOR CHIP 10uHL501 1-414-398-11 INDUCTOR CHIP 10uHL502 1-414-398-11 INDUCTOR CHIP 10uHL551 1-410-389-31 INDUCTOR CHIP 47uHL552 1-410-389-31 INDUCTOR CHIP 47uH

L553 1-414-400-41 INDUCTOR CHIP 22uHL554 1-414-400-41 INDUCTOR CHIP 22uHL601 1-419-959-21 COIL, CHOKE 6.8uHL602 1-414-398-11 INDUCTOR CHIP 10uHL801 1-469-535-21 INDUCTOR CHIP 10uH

L802 1-469-535-21 INDUCTOR CHIP 10uHL901 1-419-952-21 COIL, CHOKE 68uHL902 1-419-949-21 COIL, CHOKE 22uHL904 1-414-398-11 INDUCTOR CHIP 10uHL905 1-469-426-21 INDUCTOR CHIP 100uH

L906 1-469-367-21 INDUCTOR CHIP 10uHL1001 1-419-258-21 COIL, CHOKE 68uHL1002 1-414-398-11 INDUCTOR CHIP 10uHL1003 1-414-852-41 INDUCTOR CHIP 470uHL1004 1-410-389-31 INDUCTOR CHIP 47uH

L1005 1-414-521-11 INDUCTOR CHIP 10uH

< TRANSISTOR >

Q301 8-729-037-52 TRANSISTOR 2SD2216J-QR(TX)Q302 8-729-046-49 FET FDV304PQ501 8-729-922-10 TRANSISTOR 2SA1577-QRQ601 8-729-046-45 FET SI2302DS-T1Q602 8-729-046-44 TRANSISTOR ZDT6718TA

Q603 8-729-053-71 FET TS8K1TBQ604 8-729-046-43 FET HAT2051T-ELQ605 8-729-046-42 FET HAT2050T-ELQ801 8-729-429-44 TRANSISTOR XP1501Q1001 8-729-052-37 FET XP151A13A0MR

Q1002 8-729-013-60 TRANSISTOR RN1110-TE85LQ1003 8-729-051-50 FET XP152A12C0MRQ1004 8-729-037-52 TRANSISTOR 2SD2216J-QR(TX)Q1005 8-729-037-52 TRANSISTOR 2SD2216J-QR(TX)Q1006 8-729-051-50 FET XP152A12C0MR

Q1007 8-729-905-40 TRANSISTOR 2SC4081-T106Q1008 8-729-037-62 TRANSISTOR UN9114J-(TX).SOQ1009 8-729-046-45 FET SI2302DS-T1Q1010 8-729-046-45 FET SI2302DS-T1

< RESISTOR >

R102 1-218-990-11 SHORT 0R103 1-218-967-11 RES-CHIP 15K 5% 1/16WR104 1-218-965-11 RES-CHIP 10K 5% 1/16WR105 1-218-961-11 RES-CHIP 4.7K 5% 1/16WR106 1-208-635-11 RES-CHIP 10 5% 1/16W

R107 1-218-963-11 RES-CHIP 6.8K 5% 1/16WR111 1-208-715-11 METAL CHIP 22K 0.5% 1/16WR112 1-208-927-11 METAL CHIP 47K 0.5% 1/16WR118 1-208-703-11 METAL CHIP 6.8K 0.5% 1/16WR202 1-218-990-11 SHORT 0

R203 1-218-967-11 RES-CHIP 15K 5% 1/16W

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Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark

MAIN

R204 1-218-965-11 RES-CHIP 10K 5% 1/16WR205 1-218-961-11 RES-CHIP 4.7K 5% 1/16WR206 1-208-635-11 RES-CHIP 10 5% 1/16WR207 1-218-963-11 RES-CHIP 6.8K 5% 1/16WR211 1-208-715-11 METAL CHIP 22K 0.5% 1/16W

R212 1-208-927-11 METAL CHIP 47K 0.5% 1/16WR218 1-208-703-11 METAL CHIP 6.8K 0.5% 1/16WR301 1-218-990-11 SHORT 0R302 1-218-953-11 RES-CHIP 1K 5% 1/16WR303 1-218-935-11 RES-CHIP 33 5% 1/16W

R304 1-218-953-11 RES-CHIP 1K 5% 1/16WR305 1-218-953-11 RES-CHIP 1K 5% 1/16WR306 1-218-963-11 RES-CHIP 6.8K 5% 1/16WR307 1-218-941-81 RES-CHIP 100 5% 1/16WR309 1-218-981-11 RES-CHIP 220K 5% 1/16W

R310 1-218-990-11 SHORT 0R311 1-218-989-11 RES-CHIP 1M 5% 1/16WR317 1-218-941-81 RES-CHIP 100 5% 1/16WR318 1-218-953-11 RES-CHIP 1K 5% 1/16WR319 1-218-953-11 RES-CHIP 1K 5% 1/16W

R501 1-218-971-11 RES-CHIP 33K 5% 1/16WR505 1-208-703-11 METAL CHIP 6.8K 0.5% 1/16WR507 1-218-953-11 RES-CHIP 1K 5% 1/16WR517 1-208-691-11 METAL CHIP 2.2K 0.5% 1/16WR519 1-218-977-11 RES-CHIP 100K 5% 1/16W

R521 1-218-446-11 METAL CHIP 1 5% 1/10WR601 1-218-989-11 RES-CHIP 1M 5% 1/16WR602 1-218-981-11 RES-CHIP 220K 5% 1/16WR603 1-218-977-11 RES-CHIP 100K 5% 1/16WR604 1-219-724-11 METAL CHIP 1 1% 1/4W

R605 1-242-996-11 METAL CHIP 0.68 1% 1/4WR606 1-218-949-11 RES-CHIP 470 5% 1/16WR607 1-218-945-11 RES-CHIP 220 5% 1/16WR608 1-218-983-11 RES-CHIP 330K 5% 1/16WR609 1-219-724-11 METAL CHIP 1 1% 1/4W

R610 1-218-990-11 SHORT 0R611 1-218-990-11 SHORT 0R613 1-218-957-11 RES-CHIP 2.2K 5% 1/16WR619 1-218-990-11 SHORT 0R620 1-218-965-11 RES-CHIP 10K 5% 1/16W

R621 1-218-965-11 RES-CHIP 10K 5% 1/16WR624 1-216-797-11 METAL CHIP 10 5% 1/10WR801 1-218-981-11 RES-CHIP 220K 5% 1/16WR802 1-208-927-11 METAL CHIP 47K 0.5% 1/16WR803 1-208-927-11 METAL CHIP 47K 0.5% 1/16W

R804 1-218-959-11 RES-CHIP 3.3K 5% 1/16WR805 1-218-959-11 RES-CHIP 3.3K 5% 1/16WR806 1-218-951-11 RES-CHIP 680 5% 1/16WR807 1-208-635-11 RES-CHIP 10 5% 1/16WR808 1-218-965-11 RES-CHIP 10K 5% 1/16W

R809 1-218-977-11 RES-CHIP 100K 5% 1/16WR810 1-218-990-11 SHORT 0R812 1-218-990-11 SHORT 0R814 1-208-635-11 RES-CHIP 10 5% 1/16WR815 1-218-990-11 SHORT 0

R816 1-218-990-11 SHORT 0R817 1-218-977-11 RES-CHIP 100K 5% 1/16WR821 1-218-981-11 RES-CHIP 220K 5% 1/16WR822 1-218-953-11 RES-CHIP 1K 5% 1/16WR823 1-218-945-11 RES-CHIP 220 5% 1/16W

R824 1-218-959-11 RES-CHIP 3.3K 5% 1/16WR825 1-202-974-11 RES-CHIP 3.3M 5% 1/16WR828 1-208-691-11 METAL CHIP 2.2K 0.5% 1/16WR829 1-208-691-11 METAL CHIP 2.2K 0.5% 1/16WR830 1-218-989-11 RES-CHIP 1M 5% 1/16W

R831 1-218-990-11 SHORT 0R834 1-208-715-11 METAL CHIP 22K 0.5% 1/16WR835 1-218-983-11 RES-CHIP 330K 5% 1/16WR836 1-218-990-11 SHORT 0R837 1-218-990-11 SHORT 0

R839 1-208-939-11 METAL CHIP 150K 0.5% 1/16WR840 1-216-809-11 METAL CHIP 100 5% 1/10WR841 1-218-990-11 SHORT 0R902 1-218-985-11 RES-CHIP 470K 5% 1/16WR903 1-218-957-11 RES-CHIP 2.2K 5% 1/16W

R905 1-218-957-11 RES-CHIP 2.2K 5% 1/16WR906 1-218-990-11 SHORT 0R907 1-218-985-11 RES-CHIP 470K 5% 1/16WR908 1-218-977-11 RES-CHIP 100K 5% 1/16WR909 1-218-965-11 RES-CHIP 10K 5% 1/16W

R910 1-218-965-11 RES-CHIP 10K 5% 1/16WR911 1-218-949-11 RES-CHIP 470 5% 1/16WR914 1-218-941-81 RES-CHIP 100 5% 1/16WR915 1-216-296-11 SHORT 0R917 1-208-699-11 METAL CHIP 4.7K 0.5% 1/16W

R921 1-218-989-11 RES-CHIP 1M 5% 1/16WR936 1-208-715-11 METAL CHIP 22K 0.5% 1/16WR941 1-218-969-11 RES-CHIP 22K 5% 1/16WR946 1-208-715-11 METAL CHIP 22K 0.5% 1/16WR947 1-208-695-11 METAL CHIP 3.3K 0.5% 1/16W

R948 1-208-939-11 METAL CHIP 150K 0.5% 1/16WR1001 1-218-961-11 RES-CHIP 4.7K 5% 1/16WR1005 1-218-977-11 RES-CHIP 100K 5% 1/16WR1006 1-218-965-11 RES-CHIP 10K 5% 1/16WR1007 1-218-985-11 METAL CHIP 470K 0.5% 1/16W

R1008 1-208-947-11 METAL CHIP 330K 0.5% 1/16WR1009 1-208-935-11 METAL CHIP 100K 0.5% 1/16WR1010 1-216-857-11 METAL CHIP 1M 5% 1/10WR1011 1-208-935-11 METAL CHIP 100K 0.5% 1/16WR1014 1-220-398-11 RES-CHIP 1.5M 5% 1/16W

R1016 1-218-977-11 RES-CHIP 100K 5% 1/16WR1017 1-208-683-11 METAL CHIP 1K 0.5% 1/16WR1018 1-208-699-11 METAL CHIP 4.7K 0.5% 1/16WR1019 1-243-975-81 METAL CHIP 4.7M 5% 1/16WR1021 1-220-398-11 RES-CHIP 1.5M 5% 1/16W

R1022 1-208-947-11 METAL CHIP 330K 0.5% 1/16WR1023 1-208-683-11 METAL CHIP 1K 0.5% 1/16WR1026 1-218-989-11 RES-CHIP 1M 5% 1/16WR1029 1-218-990-11 SHORT 0R1030 1-218-979-11 RES-CHIP 150K 5% 1/16W

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Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark

MAIN

The components identified bymark 0 or dotted line with mark0 are critical for safety.Replace only with part numberspecified.

Les composants identifiés par unemarque 0 sont critiques pour lasécurité.Ne les remplacer que par une piéceportant le numéro spécifié.

R1031 1-218-990-11 SHORT 0R1032 1-218-990-11 SHORT 0R1033 1-208-707-11 METAL CHIP 10K 0.5% 1/16WR1034 1-208-927-11 METAL CHIP 47K 0.5% 1/16WR1035 1-218-989-11 RES-CHIP 1M 5% 1/16W

R1039 1-219-724-11 METAL CHIP 1 1% 1/4WR1042 1-218-973-11 RES-CHIP 47K 5% 1/16WR1047 1-218-985-11 RES-CHIP 470K 5% 1/16WR1049 1-218-989-11 RES-CHIP 1M 5% 1/16W

< NETWORK RESISTOR >

RB551 1-233-959-21 RES, NETWORK (CHIP TYPE) 470X4RB552 1-233-973-11 RES, NETWORK (CHIP TYPE) 100KX4RB553 1-233-967-11 RES, NETWORK (CHIP TYPE) 10KX4RB801 1-233-973-11 RES, NETWORK (CHIP TYPE) 100KX4

< SWITCH >

S803 1-762-805-21 SWITCH, PUSH (1 KEY) (PROTECT DETECT)S805 1-771-868-11 SWITCH, PUSH (1 KEY) (HALF LOCK)S806 1-762-805-21 SWITCH, PUSH (1 KEY) (OPEN/CLOSE DETECT)

< FILTER >

T601 1-416-405-21 FILTER, CHIP EMI (COMMON MODE)

< THERMISTOR >

TH601 1-533-817-21 THERMISTOR

< VIBRATOR >

X801 1-795-024-11 VIBRATOR, CRYSTAL (45.1584MHz)*************************************************************

MISCELLANEOUS***************

5 1-476-305-11 LCD MODULE114 1-679-372-11 MOTOR FLEXIBLE BOARD

0120 X-3379-508-1 SERVICE ASSY, OP (LCX-4R)M601 8-835-706-01 MOTOR, DC SSM18A/C-NP (SPINDLE)

(WITH TURNTABLE)M602 1-763-399-11 MOTOR, DC (SLED) (WITH GEAR)

M603 1-763-400-21 MOTOR, DC (OVER WRITE HEAD UP/DOWN)*************************************************************

ACCESSORIES************

1-476-304-33 REMOTE CONTROL UNIT (RM-MZ1T)(E,AUS,JE,KR,HK)

1-476-304-43 REMOTE CONTROL UNIT (RM-MZ1T)(AEP,UK,CET)

1-476-304-63 REMOTE CONTROL UNIT (RM-MZ1T) (FR)0 1-476-627-13 ADAPTOR, AC (AC-MZR55) (E,JE)0 1-476-857-11 ADAPTOR, AC (AC-ES305) (AEP,FR,CET)

0 1-476-858-11 ADAPTOR, AC (AC-ES305) (UK,HK)0 1-476-860-11 ADAPTOR, AC (AC-ES305) (AUS)0 1-569-008-21 ADAPTOR, CONVERSION 2P (JE)

1-756-145-11 BATTERY, NICKEL CADMIUM (NC-WMAA)(E,AUS,JE,KR,HK)

1-756-145-21 BATTERY, NICKEL CADMIUM (NC-WMAA)(AEP,UK,FR,CET)

1-816-206-11 CONNECTOR, OPTICAL (EXCEPT JE,KR,HK)1-816-206-21 CONNECTOR, OPTICAL (JE,KR,HK)3-021-018-11 LABEL, FRANCE (FR)3-220-749-01 CASE, CARRYING (E,AUS,JE,KR,HK)3-223-571-01 CASE, BATTERY CARRYING

3-228-300-01 CASE, BELT CLIP CARRYING (AEP,UK,FR,CET)3-239-281-11 MANUAL, INSTRUCTION (ENGLISH)

(AEP,UK,AUS,CET)3-239-281-21 MANUAL, INSTRUCTION (FRENCH) (AEP,FR)3-239-281-31 MANUAL, INSTRUCTION (GERMAN,DUTCH,

ITALIAN) (AEP)3-239-281-41 MANUAL, INSTRUCTION (PORTUGUESE,

SPANISH) (JE)

3-239-281-61 MANUAL, INSTRUCTION (RUSSIAN,HUNGARIAN,POLISH,CZECH,SLOVAKIAN)

(CET)3-239-281-71 MANUAL, INSTRUCTION (ENGLISH,

TRADITIONAL CHINESE,KOREAN) (JE,KR,HK)

3-239-281-91 MANUAL, INSTRUCTION (ENGLISH,TRADITIONAL CHINESE) (E)

8-954-008-90 RECEIVER, EAR MDR-E808SP

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MEMO

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MZ-G755

REVISION HISTORY

Clicking the version allows you to jump to the revised page.Also, clicking the version at the upper on the revised page allows you to jump to the next revised page.

Ver. Date Description of Revision1.0 2002. 04 New