STR-WX5E Model

Australian ModelTourist Model

SERVICE MANUAL

FM STEREO/FM-AM RECEIVER

MICROFILM

SPECIFICATIONS

STR-WX5 is the tuner and amplifiersection in MHC-WX5.

Amplifier sectionThe following measured at AC 120, 220, 240V 50/60HzDIN power output (Rated) (FRONT)

120 + 120W (6 Ω at 1kHz DIN)Continuous RMS power output (Reference)

150 + 150 W(6 Ω at 1kHz, 10% THD)

Inputs MD/VIDEO 1 IN (phono jacks): voltage450/250mV, impedance 47kΩAV INPUT AUDIO (phono jacks):voltage 250mV, impedance 47kΩMIX MIC (phone jack): sensitivity 1mV,impedance 10kΩ

Output MD/VIDEO 1 OUT (phono jacks):voltage 450/250mV, impedance 1kΩPHONES (stereo phone jack): acceptsheadphones of 8Ω or more.FRONT SPEAKER:accepts impedance of 6 to 16ΩREAR SPEAKER:accepts impedance of 16ΩSUPER WOOFER:Voltage 1V, impedance 1kΩ

Video sectionInputs AV INPUT VIDEO (phono jack): 1Vp-p,

75ΩOutputs MONITOR OUT (phono jack): 1Vp-p,

75ΩTuner sectionFM stereo, FM/AM superheterodyne tuner

FM tuner sectionTuning range 87.5 – 108.0MHzAntenna terminals 75Ω unbalancedIntermediate frequency 10.7MHz

AM tuner sectionTuning rangeLatin America models: 530 – 1,710kHz (10kHz step)

531 – 1,710kHz (9kHz step)Middle Easten models: 531 – 1,602kHz(with the MW interval set at

9kHz)5.95 – 17.90MHz (with the SW interval setat 5kHz)

Australian, Israel, and Thai models :531 – 1,602kHz(with the AM tuninginterval set at 9kHz)530 – 1,710kHz (with the AM tuninginterval set at 10kHz)

Other models: MW :531 – 1,602kHz(with the MW tuninginterval set at 9kHz)530 – 1,710kHz (with the MW tuninginterval set at 10kHz)SW :5.95 – 17.90 MHz (with the SW tuninginterval set at 5kHz)

Intermediate frequency 450kHzAntenna AM loop antenna

External antenna terminal

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STR-WX5

1313

4-4. SCHEMATIC DIAGRAM MAIN(1/2) SECTION • Refer to page 24 for IC Block Diagrams.

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16

STR-WX5

1414

4-5. SCHEMATIC DIARGAM MAIN(2/2) SECTION • Refer to page 12 for Printed Wiring Board. • Refer to page 24 for IC Block Diagrams.

The components identified by mark ! or dottedline with mark ! are critical for safety.Replace only with part number specified.

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0.8

0.1

Q854BN1F4M

Q8552SC2958LRELAY SWITCH

R85722k

0

STR-WX5

1515

4-6. SCHEMATIC DIAGRAM AV/MIC SECTION 4-7. PRINTED WIRING BOARD AV/MIC SECTION• Refer to page 24 for IC Block Diagrams. • Refer to page 9 for Circuit Boards Location.

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MODEL

MODEL

MODEL

MODEL(Page 12)

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16

4

MODEL

MODEL

MODEL

MODEL

4

STR-WX5

1616

4-8. SCHEMATIC DIAGRAM POWER AMP SECTION

The components identified by mark ! or dottedline with mark ! are critical for safety.Replace only with part number specified.

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16

1/4W

1/4W

1/4W

STR-WX5

1818

4-10. SCHEMATIC DIAGRAM DISPLAY SECTION • Refer to page 25 for IC Block Diagrams. • Refer to page 26 for IC Pin Function.

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16

3.6

3.5

3.5

STR-WX5

2020

4-12. SCHEMATIC DIAGRAM SLIDING PANEL SECTION • Refer to page 28 for IC Block Diagrams.

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0.6

12.7

12.7 0.6

0.7

4.5 0 00

3.6

3.5

16

3.5

3.5

4.9

4.9

4.9

23

4-15. SCHEMATIC DIAGRAM TRANS SECTION

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16

The components identified by mark ! or dottedline with mark ! are critical for safety.Replace only with part number specified.

STR-WX5

24

• MAIN (2/2) SECTION

IC112 MC14052BCP

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

2X0

X2

VDD

X1

XCOM

X0

X3

A

BVSS

VEE

INH

2X1

2X3

2XCOM

2X2

IC402 MC14053BCP

1

2

3

4

5

6

7

8

B1

B0

C.COM

CO

INH

VEE

VSS

VDD

B.COM

A.COM

A1

A0

A

B

C

C1

9

10

11

12

13

14

15

16

OPEN

OPEN

OPEN

• MAIN (1/2) SECTION

IC401 M65850P

OSCILLATOR

1/2 VCC

AUTORESET

LPF1

MAINCONTROL

A/D

20KBITSRAM

LPF2D/A

1 2 3 4 5 6 7

891014 13 12 11

CLOCK

RESETMO

MID1 DO0

DO1

VCC

CLOC

K

REF

OP2I

N

OP2O

UT

LPF2

IN

LPF2

OUT

LPF1

IN

LPF1

OUT

OP1O

UT

OP1I

N

CC1

CC2

GND

1 2 3 4 5 6 7 8

OVER LOAD DET

F/FOFFSET DET

LATCH/AUTORESET

VCC ONMUTE

AC OFFDET

VCC

IC851 uPC1237HA

• MIC/ECHO SECTION

IC6002 M65850P

OSCILLATOR

1/2 VCC

AUTORESET

LPF1

MAINCONTROL

A/D

20KBITSRAM

LPF2D/A

1 2 3 4 5 6 7

891014 13 12 11

CLOCK

RESETMO

MID1 DO0

DO1

VCC

CLOC

K

REF

OP2I

N

OP2O

UT

LPF2

IN

LPF2

OUT

LPF1

IN

LPF1

OUT

OP1O

UT

OP1I

N

CC1

CC2

GND

4-16. IC BLOCK DIAGRAMS

25

• DISPLAY SECTION

IC505 MC14053BCP

2

3

14

1

f04

13 f

12 VCC

11 NC

10 NC

15 f03

5GND

6BIASC

7NC

8NC

9NC

4

16 f02

17 f01

18 RESETRESETC

PREF

LINENF

LINEIN

REFFERENCECURRENT

BPF DET

BPF DET

BPF DET

BPF DET

DET

RESET

Bias

1

2

3

4

5

6

7

8

B1

B0

C.COM

CO

INH

VEE

VSS

VDD

B.COM

A.COM

A1

A0

A

B

C

C1

9

10

11

12

13

14

15

16

OPEN

OPEN

OPEN

• SLIDING PANEL SECTION

IC891 LB1641

IC506 BA3833F

1 2 3 4 5 6 7 8 9 10

GND

MOT

ORDR

IVE

NOIS

EFI

LTER

CLAM

P

FWD.

IN

REV.

IN

VCC

1

VCC

2

NOIS

EFI

LTER

MOT

ORDR

IVE

MOTORDRIVE

MOTORDRIVE

T.S.D O.C.P

FWD/REV/STOPCONTROL LOGIC