Sony Walkman WM-GX788 Service Manual Download Page 17

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WM-GX780/GX788

6-5. Schematic Diagram (2/2)

• See page 18 for IC Block Diagrams.

TP19

TP20

TP18

TP42

TP43

TP44

TP28

TP27

TP29

TP30

TP49

TP50

TP51

R511

R512

R513

R520

R104

R204

R302

R112

R305

R208

R203

R521

R519

R518

IC301

R103

F701

R505

R212

Q506

IC501

Q305

Q508

R102

R111

R211

R303

R304

R510

Q304

Q509

T501

S501

Q502

D101

D201

D302

D303

D304

D305

R524

R526

R306

Q303

CB301

RV301

CN1

CN3

C102

C306

C504

J501

C302

C514

C524

C535

FB1

FB2

FB3

FB4

C516

C517

C518

C519

C527

C528

C503

R529

Q501

Q507

Q511

Q514

Q512

Q513

Q515

Q516

L301

L101

L201

M601

TP601

R613

R601

R106

R206

R602

R209

R109

R118

R218

R616

Q607

J301

Q605

C101

C103

C104

C106

C201

C203

C204

C311

C319

C320

C322

C601

C602

C603

C316

C206

C509

C538

C541

C605

C303

C314

C317

C525

C526

C515

C537

C540

C609

TP32

TP33

TP22

R603

Q503

Q505

Q517

Q606

R620

R621

R622

R114

R214

R110

R210

R516

R307

R525

R527

R504

R506

R507

R509

R515

C511

C507

C508

C506

R202

R503

C510

C512

R619

R105

R205

R617

R522

R607

R608

R614

R615

TP24

TP26

TP31

TP46

TP47

TP48

TP52

TP53

TP54

TP55

TP56

TP57

TP58

Q306

Q601

Q602

Q603

Q510

Q302

IC601

RV601

FB502

FB501

FB503

R502

CN301

R108

C202

C304

R207

R115

RV603

R605

R611

R609

R610

C604

C607

C606

C608

C312

C318

C315

C308

C105

C305

C309

C205

C323

C536

R517

C529

R604

TH601

Q604

RV602

C313

R116

R216

L501

C534

C533

C531

C532

R523

R528

C502

Q504

C207

C107

R508

C520

C521

C522

C523

C513

C505

R301

C310

R113

R213

R107

R215

R514

10k

2.2

220k

22k

470

TA2123AF

22k

0.25A

2.2

220k

XP1115

LA3235W

XP1215

22k

47k

470

XP1115

XN4404

1-2-3

2SD596

MA8051

100k

4.7

UN9116

680P

(SL)

RES, VAR

30K/30K

4V TA

2.5V

0UH

1 F

2200p

470k

XP4315

XP1215

2SK2009

2SJ344

2SK2009

100k

2.2k

220

470

470k

XP1115

HNIKO2FU

0.001

0.022

0.047

0.001

0.022

0.047

0.1

0.022

0.047

1 1B

0.0047

1 1B

0.22

2.2

0.0047

0.001

1 1B

0.047

DTC143TETL

DTC144TETL

1SA02S-TL

HNIKO2FU

470k

4.7k

10k

22k

47k

470k

10k

2.2M

0.0022

4.7k

1 6.3V

2.2k

470k

470

47k

XP1116

12A02S-TL

LB11675V-TLM

15k

0UH

4.7k

22k

22 4V TA

0.1

220

22k

10k

220k

0.22

0.0047

0.22

0.1

0.047

4.7

6.3V

0.47

4.7

6.3V

0.47

0.001

4.7

6.3V

470

4.7

6.3V

4.7k

100

UN5216QRS-(TX)

4.7k

0.22

4.7k

220p

470p

1.0M

10k

6.3V

XP1115

4.7k

6.3V

0.22

100p

2.2

4V B

0.0022

2.2k

2.2

IC301: Impossible to measure

Summary of Contents for Walkman WM-GX788

Page 1: ...sponse Playback 40 15 000 Hz Recording playback 100 8 000 Hz Output Headphones i jack Load impedance 8 300 Ω Input Microphone MIC jack General Power requirements 1 5 V Rechargeable battery One R6 size AA battery Dimensions w h d Approx 77 1 108 0 22 5 mm 31 8 43 8 29 32 inches excl projecting parts and controls Mass Approx 152 g 5 4 oz main unit only Supplied accessories AC power adaptor 1 Battery...

Page 2: ... solder Ordinary soldering irons can be used but the iron tip has to be applied to the solder joint for a slightly longer time Soldering irons using a temperature regulator should be set to about 350 C Caution The printed pattern copper foil may peel away if the heated tip is applied for too long so be careful Strong viscosity Unleaded solder is more viscous sticky less prone to flow than ordinary...

Page 3: ...n the main power of the regulated power supply is turned OFF once then back ON Move the FWD REV switch S801 to the center position in synchronism with the timing when the slider NR is moved 3 FF REW modes 1 Check that the PRE SET status is set 2 Connect square wave or sine wave to resistor R712 See illustration below 3 Press the x switch S703 to enter the STOP mode 4 Press the FF PRESET switch S70...

Page 4: ...side Gear REEL T side Gear NR FWD Left side REV Right side Idler Gear B Idler Gear A S side Idler Gear A T side Insert Flywheel R Cam Gear Gear Y Insert Flywheel N Pulley Reverse Clutch Assy F Motor Pulley Gear REEL T side Idler Gear A T side Insert Flywheel R Cam Gear Gear Y Gear FR FF Left side Insert Flywheel N Pulley Reverse Clutch Assy F Motor Pulley Gear REEL S side Idler Gear A S side Inser...

Page 5: ...from instruction manual x VOL VOL HOLD HOLD Y REPEAT REW REVIEW Y x REW MIC ISS x REC Plug in firmly i FF MENU SET FF CUE MENU SET ENTER COUNTER RESET SET MENU Tape counter HOLD HOLD SOUND MODE SPEED CONTROL REW SET MENU FF RADIO ON BAND ENTER RADIO OFF TUNE PRESET RADIO ON BAND OFF ...

Page 6: ... REC BUTTON ASSY CASSETTE LID ASSY ORNAMENT BLOCK ASSY REEL FLEXIBLE RETAINER MOTOR M901 BRACKET CASSETTE ASSY HOLDER FA ASSY PINCH LEVER RA ASSY PINCH LEVER NA ASSY MAGNETIC HEAD HP901 1 Open the battery lid 3 battery lid 4 two screws M1 4 EG 6 two screws M1 4 EG 5 screw M1 4 EG Note On installation case block assy adjust the S501 and knob iss knob iss 7 Remove the case block assy in the directio...

Page 7: ... Rec Button Assy 3 3 Cassette Lid Assy 1 rec spring 3 torion spring hold 2 button rec 4 button assy 5 knob hold 2 two screws M1 4 EG 1 screw M1 4 EG 3 Slide the knob open in the direction of the arrow 5 cassette lid assy 4 shaft ...

Page 8: ...ible retainer 1 claw 1 claw 2 claw 3 claw 3 claw 4 boss 5 ornament block assy reel 6 screw M1 4 5 two screws 3 Remove two solders of plunger solenoid 4 Remove four solders of leaf switch 7 flexible board head 8 MAIN board 1 Remove four solders of motor 9 belt F0 2 Remove three solders of ATS flexible board ...

Page 9: ...r M901 3 7 Bracket cassette Assy Holder FA Assy 1 two screws M1 4 2 motor M901 3 motor retainer F1 6 flexible board head 1 two screws M1 4 1 6 3 screw M1 4 2 lock lever B 5 bracket cassette assy 8 holder FA assy 4 shaft 7 shaft ...

Page 10: ... Lever NA Assy 3 9 Magnetic Head HP901 1 claw 2 Remove the pinch lever RA assy in the dereciton of the arrow 4 Remove the pinch lever NA assy in the direction of the arrow 3 claw 1 claw 2 Remove the magnetic head HP901 in the direction of the arrow ...

Page 11: ...24CC 3kHz 0dB Set i REMOTE jack J301 16 Ω Frequency counter MAIN BOARD SIDE B Adjustment Parts Location MAIN BOARD SIDE A Mode FWD FWD Back Tension REV REV Back Tension FF REW Torque Meter CQ 102C CQ 102C CQ 102RC CQ 102RC CQ 201B Meter Reading 1 47 to 2 45 mN m 15 to 25 g cm 0 21 to 0 34 oz inch Less than 0 20 mN m Less than 2 0g cm Less than 0 028 oz inch 1 47 to 2 45 mN m 15 to 25 g cm 0 21 to ...

Page 12: ...t 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 PB a REC F FM Waveform Note on Printed Wiring Board Y parts extracted from the conductor side b Pattern from the side which enables seeing Caution Pattern ...

Page 13: ...SENSER PH701 46 27 CONT D 28 CONT C FWD REV 32 REC PLAY 34 MIC RADIO DET Q3 PRE CONT Q306 AVLS Q305 Q702 CUE REVIEW M RV601 RV602 RV602 RV603 10 1 70 RESET 58 MAIN KEY 42 HOLD IC703 RESET HPF FL1 BPF CF1 BPF AM FREQUENCY COVERAGE FM FREQUENCY COVERAGE FL2 1 4 8 12 13 2 30 L2 D2 29 L1 D4 24 16 L3 L1 FM TV OSC L3 AM OSC L5 TV FREQUENCY COVERAGE L2 L5 L4 L5 CT1 CT1 D3 25 D1 1 2 FM TV MIX TV OSC FM OS...

Page 14: ...ef No Location D1 C 10 D5 E 11 D101 D 10 D201 D 10 D302 D 11 D303 B 11 D304 B 11 D305 B 10 D401 D 2 IC501 E 8 IC601 E 5 IC703 G 5 IC901 G 6 PH701 D 6 Q305 F 10 Q306 F 10 Q404 G 7 Q405 D 4 Q407 G 7 Q502 D 8 Q504 H 10 Q505 E 8 Q506 G 10 Q507 D 7 Q508 D 7 Q509 H 11 Q510 D 8 Q514 H 10 Q515 H 11 Q516 H 11 Q601 D 4 Q602 E 4 Q603 D 4 Q701 D 6 Q702 G 7 6 2 Printed Wiring Board Side A Uses unleaded solder ...

Page 15: ... MOTOR V U W RADIO OFF HOLD S701 RADIO ON BAND MENU REC ENTER L5 AM FERRITE ROD ANTENNA L CH L CH FWD FLEXIBLE R CH R CH HP901 REV FWD REV 1 2 3 4 5 6 7 8 9 SPEED CONTROL Semiconductor Location Ref No Location D2 E 2 D3 D 3 D4 D 2 D402 D 9 D403 D 8 D404 D 8 D701 D 4 IC1 E 3 IC301 F 4 IC401 D 10 IC701 G 6 IC702 G 5 Q1 F 3 Q2 G 3 Q3 H 2 Q302 G 4 Q303 E 5 Q304 F 5 Q401 D 8 Q402 E 9 Q403 E 8 Q406 D 7 ...

Page 16: ...16 C409 C8 C12 C11 R12 R11 FM IF AM IF AM OSC SVC347 1k MA2S357 2 2k 2 2k 10k 470k 470k 10p 100k MA2S357 S 80808ANNP E7Y RESET IC 100k 10k 10k 10k 10k 1k 1M 220k 220k 47 470 470k MA111 XP4501 XP4315 UN9216 PR 20 XC62RP1602MR 4 7k 0 5 10k 47k 0 5 22k 0 5 F R SW 470k 470k 100k 100k 680 DC DC 2SD1048 0 0 220k 220k BAR ANTENNA 47k 0 5 100k 0 5 100k 0 5 10k 0 5 470 0 5 1 5k 0 5 2 2k 0 5 10k 0 5 220 0 5...

Page 17: ...3 C531 C532 R523 R528 C502 Q504 C207 C107 R508 C520 C521 C522 C523 C513 C505 R301 C310 R113 R213 R107 R215 R514 10k 10k 10k 10k 2 2 2 2 220k 220k 22k 22k 22k 470 470 470 TA2123AF 22k 0 25A 2 2 220k XP1115 LA3235W XP1215 XP1215 1k 1k 1k 22k 47k 470 XP1115 XN4404 1 2 3 2SD596 MA8051 MA8051 MA8051 MA8051 MA8051 MA8051 100k 100k 4 7 UN9116 680P SL RES VAR 30K 30K 22 4V TA 22 22 4V 3P 47 2 5V 47 2 5V 2...

Page 18: ... AMP FWD REC AMP MONITOR AMP DET MIC REGULATOR REC BIAS REGULATOR ALC AMP L ALC AMP R VCC2 REC AGC DET BST PWC PWB PWA TOMP RIPPLE FILTER MIX MTL DRV VREF PREA PREB BEEP SW 36 35 34 33 32 31 30 29 28 27 26 25 24 22 21 20 19 18 17 16 15 14 13 23 12 11 10 9 8 7 6 5 3 2 1 4 48 47 46 45 44 43 42 41 40 39 38 37 AGC DET AGC IN BST NF BST OUT IN C LPF EQ R NF R IN R IN L PW NF L EQ L RF IN PW GND OUT L O...

Page 19: ...ew L Normal Power supply voltage H AM TV H L STOP FM TV L H FM TV L TV H L STOP AM H AMP ON L AMP OFF H On L Off BEEP terminal EEPROM chip select EEPROM DATA output EEPROM clock terminal Recording control terminal H Normal L Rec TEST terminal Hold control input H HOLD OFF L HOLD ON H NORMAL L E2P Write in mode Photo input terminal IF input Tape sound existing or not exiting detect L Music exists H...

Page 20: ... ON H MIC Mecha Position switch Mecha Position switch Mecha Position switch RESET terminal H during operation Terminal to which external oscillator is connected Power supply Ground terminal Terminal to which external oscillator is connected Terminal to step up power supply voltage for LCD drive Terminal for 1 5V constant voltage power supply of LCD drive Terminal to step up power supply voltage fo...

Page 21: ...Description Remarks 1 2 3 4 5 6 7 8 9 10 12 13 14 15 16 16 16 17 18 19 1 3 245 675 01 WINDOW LCD SILVER GX788 1 3 245 675 11 WINDOW LCD BLUE GX788 1 3 245 675 21 WINDOW LCD GX780 2 3 245 678 01 KNOB REC 3 3 245 673 01 CASE SILVER 3 3 245 673 11 CASE BLUE GX788 4 3 034 066 02 KNOB ISS 5 3 254 488 01 KNOB OPEN 6 3 029 220 11 SPRING TENSION 7 3 233 968 01 ORNAMENT REEL 8 3 245 674 01 PLATE COVER SILV...

Page 22: ...3377 717 2 BRACKET ASSY M 62 3 035 199 01 SHEET GR3 63 3 246 486 11 MD COVER 64 X 3383 281 1 LID ASSY CASSETTE BLUE GX788 E 64 X 3383 298 1 LID ASSY CASSETTE SILVER GX780 GX788 US CH KR HK EA JE 64 X 3383 317 1 LID ASSY CASSETTE BLUE GX780 GX788 US CH KR HK EA JE 64 X 3383 309 1 LID ASSY CASSETTE BLUE GX788 AEP 65 3 245 282 01 WINDOW CASSETTE 66 X 3377 719 1 BRACKET CASSETTE ASSY M 67 3 038 054 01...

Page 23: ...R 111 3 040 897 04 SPRING TGA TORSION 112 3 386 694 01 WASHER 113 X 3379 420 1 FLYWHEEL N INSERT 114 3 221 357 01 BELT F0 115 X 3379 421 1 FLYWHEEL R INSERT 116 3 007 428 01 WASHER R 117 3 029 765 01 SCREW M1 4 TOOTHED LOCK 118 3 029 883 01 RETAINER F1 MOTOR 119 3 007 433 12 SHEET N REFLECTION 120 X 3377 584 5 CHASSIS ASSY FA 121 3 010 274 02 TABLE REEL 122 3 010 954 01 SPRING BT COMPRESSION 123 3...

Page 24: ...F 10 00 16V C24 1 107 819 11 CERAMIC CHIP 0 022uF 10 00 16V C28 1 164 874 11 CERAMIC CHIP 100PF 5 00 50V C29 1 164 850 11 CERAMIC CHIP 10PF 0 50PF 50V C30 1 164 315 11 CERAMIC CHIP 470PF 5 00 50V C31 1 107 819 11 CERAMIC CHIP 0 022uF 10 00 16V C33 1 164 843 11 CERAMIC CHIP 3PF 0 25PF 50V C34 1 164 939 11 CERAMIC CHIP 0 0022uF 10 00 50V C35 1 164 939 11 CERAMIC CHIP 0 0022uF 10 00 50V C36 1 164 874...

Page 25: ...uF 10 6 3V C538 1 125 837 91 CERAMIC CHIP 1uF 10 6 3V C540 1 125 837 91 CERAMIC CHIP 1uF 10 6 3V C541 1 125 837 91 CERAMIC CHIP 1uF 10 6 3V C601 1 165 176 11 CERAMIC CHIP 0 047uF 10 00 16V C602 1 107 826 11 CERAMIC CHIP 0 1uF 10 00 16V C603 1 115 467 11 CERAMIC CHIP 0 22uF 10 00 10V C604 1 165 128 11 CERAMIC CHIP 0 22uF 16V C605 1 115 467 11 CERAMIC CHIP 0 22uF 10 00 10V C606 1 164 941 11 CERAMIC ...

Page 26: ...5 01 TRANSISTOR UMZ8NTR Q406 6 550 623 01 TRANSISTOR 12A02S TL Q407 8 729 927 99 TRANSISTOR 2SC4617TL Q Q501 8 729 425 46 TRANSISTOR XP4315 TXE Q502 8 729 141 75 TRANSISTOR 2SD596 T1DV4 Q503 8 729 929 23 TRANSISTOR DTC143TE TL Q504 8 729 425 89 TRANSISTOR XP1115 TXE Q505 8 729 929 32 TRANSISTOR DTC144TE TL Q506 8 729 425 89 TRANSISTOR XP1115 TXE Q507 8 729 426 36 TRANSISTOR XP1215 TXE Q508 8 729 4...

Page 27: ...RES CHIP 680 5 1 16W R406 1 218 953 11 RES CHIP 1K 5 1 16W R407 1 218 973 11 RES CHIP 47K 5 1 16W R408 1 218 953 11 RES CHIP 1K 5 1 16W R409 1 218 961 11 RES CHIP 4 7K 5 1 16W R410 1 218 981 11 RES CHIP 220K 5 1 16W R411 1 208 927 11 METAL CHIP 47K 0 5 1 16W R412 1 208 699 11 METAL CHIP 4 7K 0 5 1 16W R413 1 218 965 11 RES CHIP 10K 5 1 16W R414 1 208 927 11 METAL CHIP 47K 0 5 1 16W R415 1 208 715 ...

Page 28: ...00K 0 5 1 16W R902 1 208 935 11 METAL CHIP 100K 0 5 1 16W VARIABLE RESISTOR RV301 1 225 684 21 RES VAR CARBON 30K 30K VOL RV601 1 227 550 11 RES ADJ CERMET 15K RV602 1 227 501 11 RES VAR CARBON 4 7K SPEED CONTROL RV603 1 225 903 21 RES ADJ CERMET 3 TYPE 22K SWITCH S501 1 692 605 51 SWITCH SLIDE ISS S701 1 572 467 21 SWITCH PUSH 1 KEY HOLD S702 1 786 515 21 SWITCH TACTILE ENTER S703 1 786 515 21 SW...

Page 29: ...ENGLISH KOREAN GX788 KR 3 255 271 51 MANUAL INSTRUCTION ENGLISH TRADITIONAL CHINESE GX788 HK 3 255 271 61 MANUAL INSTRUCTION ENGLISH TRADITIONAL CHINESE GX788 E No indication of the country of origin 3 255 271 71 MANUAL INSTRUCTION ENGLISH SIMPLIFIED CHINESE GX788 CH 3 255 272 11 MANUAL INSTRUCTION ENGLISH KOREAN GX780 KR 3 255 272 21 MANUAL INSTRUCTION ENGLISH SIMPLIFIED CHINESE GX780 CH 3 318 20...

Page 30: ...e Also clicking the version at the upper right on the revised page allows you to jump to the next revised page Ver Date Description of Revision 1 0 2003 04 New 1 1 2003 10 Correction of Part No of Ref No 51 For silver SPM 03042 1 2 2006 04 Change of Part No of Leaf switch S303 503 SPM 06044 ...

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Sony Walkman WM-GX788, Service Manual

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