MZ-G750/R700...7 MZ-G750/R700 Set Panel Assy,Lower Panel Assy, Upper LCD Module Main Board MD...

1

MZ-G750/R700SERVICE MANUAL

FM/AM PORTABLE MINIDISC RECORDER

Model Name Using Similar Mechanism NEW

Mechanism Type MT-MZR700-172

Optical Pick-up Name LCX-4R

(Photo: MZ-G750)

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 0.25 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

Radio (MZ-G750)Frequency rangeAM: 531-1,602 kHzFM: 87.5-108.0 MHzGeneralPower requirementsSony AC Power Adaptor (supplied)connected at the DC IN 3 V jack:

230 V AC, 50/60 Hz (AEP model)230-240 V AC, 50 Hz (UK/Hong Kongmodel)100-240 V AC, 50/60 Hz (Other models)

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

– Continued on next page –

AEP ModelUK Model

Tourist ModelHong Kong Model

US and foreign patents licensed from DolbyLaboratories Licensing Corporation.

Ver 1.0 2001. 01

MZ-G750

PORTABLE MINIDISC RECORDERMZ-R700

Ver 1.0 2001. 01

Sony CorporationAudio Entertainment Group

General Engineering Dept.

9-873-045-112001A0400-1

© 2001. 1

2

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 life1) (MZ-G750)When recording2) (Unit: approx.hours) (EIAJ3))

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

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

battery5)

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

2) When you record, use a fully charged rechargeable battery.3) Measured in accordance with the EIAJ (Electronic Industries

Association of Japan) standard.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.When playing (Unit: approx.hours) (EIAJ1))

Batteries Stereo LP2 LP4NC-WMAA Nickel Cadmium 11.5 14 16rechargeable battery2)

LR6 (SG) Sony alkaline dry 36 42 48battery3)

1) Measured in accordance with the EIAJ (Electronic IndustriesAssociation of Japan) standard.

2) When using a 100% fully charged rechargeable battery.3) When using a Sony LR6 (SG) “STAMINA” alkaline dry battery

(produced in Japan).When using the radio (EIAJ1))

Batteries Approx. hoursNC-WMAA Nickel Cadmium rechargeable 9.5battery2)

LR6 (SG) Sony alkaline dry battery3) 28.5



(produced in Japan).

Battery life1) (MZ-R700) (Unit: approx.hours) (EIAJ2))

Batteries Stereo LP2 LP4NC-WMAA Nickel Cadmium Recording 4 6 7.5rechargeable battery3) Playback 13 14.5 18

LR6 (SG) Sony alkaline dry Recording 9 13 16battery4) Playback 40 46 53

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



(produced in Japan).DimensionsApprox. 81 × 74.4 × 28.1 mm (w/h/d)(3 1/4 × 3 × 1 1/8 in.) without projections.MassApprox. 118 g (4 5/32 oz) the recorder only (MZ-G750)Approx. 116 g (4.1 oz) the recorder only (MZ-R700)Supplied accessoriesAC power adaptor (1)Headphones/earphones with a remote control (1)Optical cable (1)NC-WMAA nickel cadmium rechargeablebattery (1)Rechargeable battery carrying case (1)Carrying pouch/carrying case with a belt clip (except U.S.A model) (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.

MZ-G750/R700

3

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

2. GENERAL Looking at the Controls (MZ-G750) ................................... 5 Looking at the Controls (MZ-R700) ................................... 6

3. DISASSEMBLY3-1. Panel Assy, Lower ............................................................... 73-2. Panel Assy, Upper ............................................................... 73-3. LCD Module ....................................................................... 83-4. Main Board ......................................................................... 83-5. MD Mechanism Deck ......................................................... 93-6. Service Assy, OP ................................................................. 93-7. Holder Assy ....................................................................... 103-8. Motor Flexible Board ........................................................ 103-9. Motor, DC (M602) ............................................................ 113-10. “Motor, DC (M601)”, “Motor, DC (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 ................................................. 215-9. Resume Clear .................................................................... 235-10. Patch Data Rewriting when Nonvolatile

Memory was Replaced ...................................................... 23

6. DIAGRAMS6-1. IC Pin Function Description ............................................ 296-2. Block Diagram – Servo Section – ..................................... 356-3. Block Diagram – Audio Section – .................................... 366-4. Block Diagram – System Control/Power Section – .......... 376-5. Printed Wiring Board – Main Section – ............................ 386-6. Schematic Diagram – Main Section (1/3) – ...................... 416-7. Schematic Diagram – Main Section (2/3) – ...................... 426-8. Schematic Diagram – Main Section (3/3) – ...................... 43

7. EXPLODED VIEWS7-1. Panel Section ..................................................................... 477-2. Chassis Section ................................................................. 487-3. MD Mechanism Deck Section .......................................... 49

8. ELECTRICAL PARTS LIST ...................................... 50

MZ-G750/R700

4

MZ-G750/R700SECTION 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 (overwrite head) with care, as ithas been soldered directly to the MAIN board.In repairing the component side of MAIN board, connect theFLEXIBLE board (overwrite head) and the MAIN board withthe lead wires in advance. (See page 8)

• Replacement of CDX2671-203GA (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

panel assy, upper

5

MZ-G750/R700SECTION 2GENERAL This section is extracted from

instruction manual.

(MZ-G750)

6

MZ-G750/R700

(MZ-R700)

7

MZ-G750/R700

Set Panel Assy,Lower Panel Assy, Upper LCD Module

Main Board MD Mechanism Deck

Service Assy, OP

Motor Flexible Board

Holder Assy

Motor, DC (M602)

Motor, DC (M601), Motor, DC (M603)

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

SECTION 3DISASSEMBLY

3-1. PANEL ASSY, LOWER

3-2. PANEL ASSY, UPPER

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

1 screws (1.4x2.0), MI


3 panel assy, upper

4 CN801



6 Panel Assy , Lower

4 claw

1

5

8

MZ-G750/R700

3-3. LCD MODULE

3-4. MAIN BOARD

1 screws (1.7x2.5)

4 LCD module

claws

panel assy, upper

2 screws (1.7x2.5)

3

3 screws (M1.4x2)

6 Remove the solders

7

8 Remove the solder

9 case assy, battery

qa spring, battery coil

qs MAIN board

0 Remove the solder

4 screws (M1.7x3)

5 screws (M1.4x2)

1 CN502

2 arm

9

MZ-G750/R700

3-5. MD MECHANISM DECK

3-6. SERVICE ASSY, OP


2 chassis assy, set

3 MD mechanism deck

boss

boss

4 spring(s), pack

6 spring, thrust detent

3 screw(M1.4), precision pan

5 screw(M1.4), precision pan1 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

10

MZ-G750/R700

3-7. HOLDER ASSY

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

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

1 Open the holder assy.

A

2

B

3 boss

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MZ-G750/R700

4 two screws(M1.4), precision pan

5 moter, DC (sled) (M602)

3 Remove four solders of motor flexible board.

1 washer (0.8 - 2.5)

2 gear (SA)

1 Remove six solders of motor flexible board.

4 three screws(M1.4), precision pan

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

6 two screws(M1.4), precision pan

qa chassis assy, gear

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 moter, DC(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.

3-9. MOTOR, DC (M602)

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

12

MZ-G750/R700

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

and MO discs to be automatically adjusted when in the test mode.In this overall adjustment mode, the disc is discriminate betweenCD and MO, and each adjustment is automatically executed inorder. If a fault is found, the system displays its location. Also,the manual mode allows each individual adjustment to be auto-matically 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 1.200

13

MZ-G750/R700

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 key,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


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

14

MZ-G750/R700

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 pickup 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 pickup was replaced.

• Self-Diagnosis Result Display Mode Setting Method

1. 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).


item numberadjustment valueaddress

• Address & Adjusted Value Display

0 113A4S1D


item numberadjustment valuejitter value

• Jitter Value & Adjusted Value Display

0 110FEJ1D


item numberadjustment value

block error value

• Block Error Value & Adjusted Value Display

0 11063B1D


item numberadjustment valueADIP error value

• ADIP Error Value & Adjusted Value Display

0 11072A1D


item numberadjustment value

• Item Title Display

0 11LrefPw 1D

item title


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

15

MZ-G750/R700

• 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 ABCD

ABCD Focus error ABCD offset erroroffset error

Offset system error33

Tracking errorTE Tracking error Offset errorOffset error

34X1 tracking error

X1TE X1 tracking error Offset errorOffset error

16

MZ-G750/R700

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.


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.)


0 00

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


0 00FF



0 00rPLAY


17

MZ-G750/R700

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.


0 00SET OK



0 00RMC OK


18

MZ-G750/R700

• 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 ValuesOn the set having the microcomputer version 1.000, some adjustedvalues were set in the manual mode at the shipment, but these datawill be cleared when the NV is reset. Therefore, on the set havingthe microcomputer version 1.000, modify the adjusted valuesthrough the following procedure immediately after the NV wasreset.

1. Item numbers in which the adjusted values are to be modifiedItem 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.

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

• SONY MO 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: 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.

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

8. RESUME Clear

Manual Mode

Manual Mode

Manual Mode

Overall Mode

Overall Mode


0 21ResNV CC


0 21Res OK?


0 21Res

0 21Reset!

NV reset(after several seconds)


8 32Pw-T W

: Adjusted value

19

MZ-G750/R700

• 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 G750: 2.50 ± 0.01V, R700: 2.40 ± 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 G750: 2.50 ± 0.01V, R700: 2.75 ± 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.


871 (see page 13).



872 (see page 13).


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.)


8 62V1dat

: Adjusted value


8 71V5num

: Adjusted value


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)


0 00Assy 00


7 62VclPWM

: Adjusted value

digitalvoltmeter

MAIN board

TP901(VC)TP912(GND)


7 63VchPWM

: Adjusted value

digitalvoltmeter

MAIN board

TP901(VC)TP912(GND)


7 64Vl PWM

: Adjusted value

20

MZ-G750/R700

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).


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

(item number 013).


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

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

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)


0 00ADJ OK


0 14SetTmp

: Adjusted value

digital voltmeter

MAIN board

TP(+)TP(–)

laserpower meter

Optical pick-upobjective lens


0 10Laser


0 11LrefPw

: Adjusted value


0 12HrefPw

: Adjusted value


0 13WritPw

: Adjusted value

21

MZ-G750/R700

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

22

MZ-G750/R700

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 disc in the set, and press the > key to set theOverall MO Adjustment mode. Automatic adjustments aremade.

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.


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


0 00Assy 11


0 35Ofst

: Adjusted value


0 00OfstOK


0 00Assy 11


X XX

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

CD RUN


0 00 NG OF

: NG item number


0 00CD OK


X XXMO RUN

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


0 00 NG OF

: NG item number


0 00MO OK

23

MZ-G750/R700

5-9. Resume ClearPerform the Resume clear when all adjustments completed.

• Resume Clear Setting Method1. Select the manual mode of the test mode, and set item number

043 (see page 13).

2. Press the X key.

3. Press the x key to return to the test mode (display checkmode).

5-10. Patch Data Rewriting When NonvolatileMemory was Replaced

On this set, if the nonvolatile memory was replaced, the modifiedprogram data must be written to the nonvolatile memory.In such a case, write the modified data that meets themicrocomputer version following the procedure provided below.

• Modified Data Writing Method (version 1.000)1. Select the manual mode of the test mode, and set item number

023 (see page 13).

2. Press the [VOL+] key once to change the adjusted value to 01.3. Press the [T MARK] key for several seconds (about 3 seconds)

to activate the patch data write mode.(The following display will appear where 00 is blinking)

4. Adjust with the [VOL+] key (adjusted value up) or [VOL--]key (adjusted value down) so that the adjusted value becomes1E.

• 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


0 43Resume CC


0 43ResClr

0 43Res

Resume clear complete


0 23Patch 00

00: Adjusted value


0 230D5800

00: Adjusted value


0 230D581E

1E: Adjusted value

24

MZ-G750/R700

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

17. Press the X key.(0D5F is blinking)

18. Press the [VOL+] key once to change the blinking portion to0D60.

19. Press the x key.(00 is blinking)


21. Press the X key.(0D60 is blinking)



24. Adjust with the [VOL+] key (adjusted value up) or [VOL--]key (adjusted value down) so that the adjusted value becomesA1.






8. Adjust with the [VOL+] key (adjusted value up) or [VOL--]key (adjusted value down) so that the adjusted value becomesB2.


10. Press the [VOL+] key once to change the blinking portion to0D5E.


12. Adjust with the [VOL+] key (adjusted value up) or [VOL--]key (adjusted value down) so that the adjusted value becomes8B.

13. Press the X key.(0D5E is blinking)

14. Press the [VOL+] key once to change the blinking portion to0D5F.



0 230D581E

1E: Adjusted value


0 230D5900

00: Adjusted value


0 230D59B2

B2: Adjusted value


0 230D5E00

00: Adjusted value


0 230D5E8B

8B: Adjusted value


0 230D5F00

00: Adjusted value


0 230D5F20

20: Adjusted value


0 230D6000

00: Adjusted value


0 230D6008

08: Adjusted value


0 230D6100

00: Adjusted value


0 230D61A1

A1: Adjusted value


0 230D6200

00: Adjusted value

25

MZ-G750/R700








34. Press the [T MARK] key for several seconds (about 3 seconds)to exit the patch data write mode (to return to the manual modedisplay in the test mode).

35. Press the X key to write the modified data. (The adjusted valuechanges to CC)

36. The modified data writing is over, if the adjusted value changesto DD.

37. Turn the power off.

• Modified Data Writing Method (version 1.100)1. Select the manual mode of the test mode, and set item number

023 (see page 13).

2. Press the [VOL+] key once to change the adjusted value to 01.3. Press the [T MARK] key for several seconds (about 3 seconds)

to activate the patch data write mode.(The following display will appear where 00 is blinking)

4. Press the X key.(0D5C is blinking)

5. Press the [VOL+] key once to change the blinking portion to0D5D.


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

8. Press the X key.(0D5D is blinking)





0 230D6204

04: Adjusted value


0 230D6500

00: Adjusted value


0 230D6520

20: Adjusted value


0 23Patch 01

01: Adjusted value


0 23 SDD

DD: Adjusted value


0 23Patch 00

00: Adjusted value


0 230D5C00

00: Adjusted value


0 230D5D00

00: Adjusted value


0 230D5DAA

AA: Adjusted value


0 230D5E00

00: Adjusted value


0 230D5E04

04: Adjusted value

26

MZ-G750/R700


13. Press the [VOL+] key to change the blinking portion to 0D61.






19. Adjust with the [VOL+] key (adjusted value up) or [VOL--]key (adjusted value down) so that the adjusted value becomesF4.




23. Adjust with the [VOL+] key (adjusted value up) or [VOL--]key (adjusted value down) so that the adjusted value becomes1C.














0 230D6100

00: Adjusted value


0 230D6120

20: Adjusted value


0 230D6400

00: Adjusted value


0 230D64F4

F4: Adjusted value


0 230D6500

00: Adjusted value


0 230D651C

1C: Adjusted value


0 230D6600

00: Adjusted value


0 230D6603

03: Adjusted value


0 230D6800

00: Adjusted value


0 230D6880

80: Adjusted value


0 230D6900

00: Adjusted value


0 230D6909

09: Adjusted value

27

MZ-G750/R700








55. Adjust with the [VOL+] key (adjusted value up) or [VOL--]key (adjusted value down) so that the adjusted value becomesD3.






37. Press the [VOL+] key to change the blinking portion to 0D6C.



40. Press the X key.(0D6C is blinking)

41. Press the [VOL+] key once to change the blinking portion to0D6D.



44. Press the X key.(0D6D is blinking)





0 230D6C00

00: Adjusted value


0 230D6CF6

F6: Adjusted value


0 230D6D00

00: Adjusted value


0 230D6D1C

1C: Adjusted value


0 230D6E00

00: Adjusted value


0 230D6E03

03: Adjusted value


0 230D7200

00: Adjusted value


0 230D7205

05: Adjusted value


0 230D7300

00: Adjusted value


0 230D73D3

D3: Adjusted value


0 230D7400

00: Adjusted value


0 230D74F8

F8: Adjusted value

28

MZ-G750/R700
















75. Adjust with the [VOL+] key (adjusted value up) or [VOL--]key (adjusted value down) so that the adjusted value becomesE0.


77. Press the [T MARK] key for several seconds (about 3 seconds)to exit the patch data write mode (to return to the manual modedisplay in the test mode).

78. Press the X key to write the modified data. (The adjusted valuechanges to CC)

79. The modified data writing is over, if the adjusted value changesto DD.

80. Turn the power off.


0 230D7500

00: Adjusted value


0 230D751C

1C: Adjusted value


0 230D7600

00: Adjusted value


0 230D7603

03: Adjusted value


0 230D7800

00: Adjusted value


0 230D7801

01: Adjusted value


0 230D7900

00: Adjusted value


0 230D79E0

E0: Adjusted value


0 23Patch 01

01: Adjusted value


0 23 SDD

DD: Adjusted value

29

MZ-G750/R700SECTION 6DIAGRAMS

6-1. IC PIN FUNCTION DESCRIPTION• IC501 SN761057DBT (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 WPPLPF — 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 pickup detector

6 D I Signal (D) input from the optical pickup detector

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

8 IY I I-V converted RF signal (IY) input from the optical pickup detector

9 IX I I-V converted RF signal (IX) input from the optical pickup detector

10 JX I I-V converted RF signal (JX) input from the optical pickup detector

11 JY I I-V converted RF signal (JY) input from the optical pickup detector

12 A I Signal (A) input from the optical pickup detector

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

14 B I Signal (B) input from the optical pickup 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 – 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, OFC-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

30

MZ-G750/R700

• IC801 CXD2671-203GA (SYSTEM CONTROLLER, DIGITAL SIGNAL PROCESSOR, 16M BIT D-RAM)Pin No. Pin Name I/O Description

1 PAUSE KEY I Set key input terminal (X key input)

2 MIC SENSE OControl signal output to the microphone amp

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

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 XPC18A22FCR2 (IC601)

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

13, 14SET KEY 1,

I Set key input terminal (A/D input)SET KEY 2

15 VL MON I VL voltage monitor input terminal (A/D input) (G750 only)

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

17 WK DET I Set key start switching detection signal input terminal (A/D input)

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

19 HALF LOCK SW IOpen button detection switch (S805) 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)

31

MZ-G750/R700


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”)


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

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 terminal (–) to the motor driver (IC551)

88 SPFD/SPVS/PWM3 O Spindle servo drive PWM signal output (+)

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)


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–)

32

MZ-G750/R700


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)




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 DAPVDD3 — Power supply terminal (for DSP block) (+1.5 V)

114 – 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 – 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)


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, TEST0 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)


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

33

MZ-G750/R700


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, 173 SET CODE0, 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)



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

179 SI0 ISerial data input from the nonvolatile memory (IC804) and liquid crystal display

element module

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

liquid crystal display element module

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

and liquid crystal display element module

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 element “L”: reset


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, PD S1 O PD IC mode changeover signal output to the optical pick up


197 – 199 MODE1 – 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 element

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

207 LCD RST O Reset control signal output to the liquid crystal display element 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, 212 NC 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)


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

34

MZ-G750/R700


224 – 226 (XAVLS), (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)



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

244 NC — Not used (open)

MZ-G750/R700

35 35

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 IN) : REC(DIGITAL IN)

6-2. BLOCK DIAGRAM — SERVO SECTION —

(Page 37)

(Page 36)

MZ-G750/R700

3636

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


RMC KEY6


3


X MIC DET4


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)

1314

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

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

(Page 35)

(Page 37)

(Page 37)

(Page 37)

(Page 37)

MZ-G750/R700

37 37

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

4344

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

FFCLRSLEEPVLON

WK DET/PLAY(G750)REC KEY

HALF LOCK SW

VL MON/STOP(G750)

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

R1025

R1028

R1036

R700

R700

R700R920

G750

G750 Q1007

R700

G750

L801

D1003 Q1009

D1002

Q1010

VB

VG

VC

VC

VB

R1040 R1024

R1046

Q1001

L1002 L1001 D1001

D1004

Q1003

Q1004

Q1002

Q1006

Q1005

R700

R700

G750

G750

S806OPEN/CLOSE

DETECT

S803PROTECTDETECT

SL801(TEST)

VIF B+

VB B+

CN801

SDO0SCK0

RSTSTBCS

XWK1

REC

PLAYSTOP

HOLD

DVDD

PAUSESET KEY1SET KEY2

VIF B+

R1027

R1031

R1032

R700

G750

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

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