Sony WALKMAN WM-GX680, Service Manual

Page 1: ...Model 87 5 108 MHz Other Models AM 531 1710 kHz Tourist US Models 531 1 602 kHz Other Models Tape section Frequency response Dolby NR off Playback 40 15 000 Hz Recording playback 100 8 000 Hz Output Headphones iREMOTE 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 108 4 77 7 23 0 mm 43 8 31 ...

Page 2: ...ATION REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY TABLE OF CONTENTS 1 SERVICE NOTE 3 2 GENERAL 5 3 DISASSEMBLY 3 1 Case assy 6 3 2 Belt 7 3 3 Lid block assy cassette 7 3 4 Ornament reel 8 3 5 Main Board 8 3 6 Motor M601 9 3 7 Holder F Assy 9 3 8 Lever N R Assy pinch 10 3 9 Head magnetic HP901 10 4 MECHANICAL ADJUSTM...

Page 3: ...ved when the main power of the regulated power supply is turned OFF once then back ON Move the FWD REV switch S1 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 R43 See illustration below 3 Press the p switch S3 to enter the STOP mode 4 Press the FF PRESET switch S...

Page 4: ...ar 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 Insert Flywh...

Page 5: ...ction manual x VOL VOL HOLD HOLD Y REPEAT FF AMS REW AMS Y x REW Plug in firmly iREMOTE FF PRESET RADIO OFF SET MENU TUNE PRESET RADIO ON BAND OFF PRESET TUNE PRESET RADIO ON BAND ENTER SOUND MODE MODE AVLS MODE aNR PB TUNE FM PB ENTER COUNTER RESET SET MENU Tape counter HOLD HOLD ...

Page 6: ...of the arrow 4 Two screws M1 4 2 5 knob HOLD B Claw S11 S501 S2 Note When assembling the case assy align the knob HOLD B with the position of S2 knob ISS Note When assembling the case assy align the knob ISS with the position of S501 knob REC Note When assembling the case assy align the knob REC with the position of S11 Set Case assy Belt Lid block assy cassette Main board Ornament reel Motor M601...

Page 7: ...ID BLOCK ASSY CASSETTE 3 Belt Belt 2 Terminal board Battery 1 Remove solder from the battery terminal board Belt threading 5 Lid block assy cassette 4 Shaft 3 Open the cassette lid 1 Screw M1 4 2 0 2 Two screws M1 4 2 0 ...

Page 8: ...e Claw Claw SLIDER 8 Remove soldering two points from plunger solenoid 6 Screw B1 7 3 tapping 5 Screw B1 7 3 tapping 3 Screw 1 4 1 6 2 Screw M1 4 7 Screw M1 4 Toothed lock 1 Ats flexible board 4 Screw M1 4 9 Remove soldering four points from motor When assembling the MAIN board align the slider with the position of S1 Note S1 ...

Page 9: ...ws M1 4 Toothed lock 2 Motor M601 3 7 HOLDER F ASSY 4 Screw M1 4 2 Shaft 6 Shaft 1 Two screws M1 4 1 6 3 Lever B lock 9 Remove the holder F assy in the direction of the arrow 5 Lever S lock 8 Flexible board 7 Bracket cassette assy ...

Page 10: ...Note Be careful of the claw 1 Remove the lever R assy pinch in the direction of the arrow 2 Remove the lever N assy pinch in the direction of the arrow Note Be careful of the claw 1 Two screws M1 4 7 2 2 Remove the head magnetic HP901 in the direction of the arrow ...

Page 11: ... to the erase head 3 The adjustments should be performed with the rated power supply voltage unless otherwise noted Torque Measurement Signal 3 kHz 0 dB Used for Tape Speed Adjustment Tape WS 48A Test tape WS 48A 3kHz 0dB Set 2 REMOTE jack J701 16 Ω Frequency counter MAIN BOARD SIDE B RV601 L2 T2 TP6 TP5 IC2 13 24 1 12 T1 RV1 RV601 Tape speed adjustment RV1 FM VCO adjustment T2 AM IF adjustment L2...

Page 12: ...al generator to ANT TP1 22 5kHz frequency deviation by 400Hz signal Output level as low as possible Put the lead wire antenna close to the set 30 amplitude modulation by 400Hz signal Output level as low as possible AM RF signal generator 16Ω set level meter 2 REMOTE jack J701 0 01µF FM RF signal generator to ANT TP1 Carrier frequency 98MHz Modulation no modulation Output level 0 1V 100dB Frequency...

Page 13: ...ADIO IN L 20 MIC IN R 18 RADIO IN R 46 MONITOR L 47 MONITOR L 35 REC MUTE 32 REC PLAY 33 FWD REV Q515 34 MIC RADIO IC501 REC AMP OSC 6 BIAS REG 5 BIAS 7 VCC1 8 REG Q509 VCC2 45 B 2 5V B 1 5V Q513 5 1 4 2 44 12 10 IC301 1 2 PB AMP ANS IN F R SW Q304 Q19 2 5V VCC 14 4 11 5 10 IC302 DOLBY CONTROL Q305 Q303 V REF Q302 IC3 SYSTEM CONTROL Q2 BUFFER DOLBY VCC CTL AVLS CTL 23 54 BAND AM FM 30 MONO ST 68 I...

Page 14: ...ADIO IN L 20 MIC IN R 18 RADIO IN R 46 MONITOR L 47 MONITOR L 35 REC MUTE 32 REC PLAY 33 FWD REV Q515 34 MIC RADIO IC501 REC AMP OSC 6 BIAS REG 5 BIAS 7 VCC1 8 REG Q509 VCC2 45 B 2 5V B 1 5V Q513 5 1 4 2 44 12 10 IC301 1 2 PB AMP ANS IN F R SW Q304 Q19 2 5V VCC 14 4 11 5 10 IC302 DOLBY CONTROL Q305 Q303 V REF Q302 IC3 SYSTEM CONTROL Q2 BUFFER DOLBY VCC CTL AVLS CTL 23 54 BAND AM FM 30 MONO ST 68 I...

Page 15: ... WM GX680 GX688 17 18 16 6 2 SCHEMATIC DIAGRAM 1 3 See page 15 for Waveform See page 23 for IC Block Diagrams ...

Page 16: ...WM GX680 GX688 19 20 6 3 SCHEMATIC DIAGRAM 2 3 See page 15 for Waveform See page 23 for IC Block Diagrams ...

Page 17: ...WM GX680 GX688 21 22 6 4 SCHEMATIC DIAGRAM 3 3 See page 15 for Waveform See page 23 for IC Block Diagrams See page 29 for IC PIN FUNCTION DESCRIPTION ...

Page 18: ... AMP R VCC2 REC VREF OSC VCC GND IF OUT IF REG SP OUT 1 2 FM IF IN MIX 3 4 5 AM IF IN QUAD AGC 6 7 8 9 10 11 12 ROUT LOUT ST IND 13 14 15 MPX IN PILOT IN DET OUT IW SW AM RF IN 20 21 22 23 24 LPF 2A LPF 2B 18 19 LPF1 VCO 16 17 STOP PULSE OSC AGC MIX FM IF AF AM IF AM IF FM DET SWITCH AM DET DIVIDE DECODE PRE VCO 0 90 FM AM PILOT ST IND ø ø IC301 TA2123AF EL IC601 MM1279XVBE PRE A PRE B MIX PW B PW...

Page 19: ...6 17 Semiconductor Location Ref No Location Ref No Location Ref No Location Ref No Location D5 B 13 D101 D 14 D201 D 14 D301 D 15 D302 B 14 D303 B 15 D304 B 13 D305 I 13 D801 E 6 D802 G 4 D803 F 4 D804 F 5 IC302 G 15 IC501 E 11 IC801 E 5 Q9 E 9 Q15 D 7 Q20 D 9 Q304 H 15 Q305 I 14 Q501 J 6 Q502 K 14 Q503 J 14 Q504 J 8 Q505 I 10 Q506 I 8 Q507 I 9 Q509 F 12 Q510 J 7 Q511 I 10 Q512 J 9 Q515 F 10 Q801 ...

Page 20: ... VCC L CH L CH FWD FLEXIBLE R CH R CH HP901 REV FWD REV 1 2 3 4 5 6 7 8 9 LIQUID CRYSTAL DISPLAY ENTER COUNTER RESET S2 ON OFF 1 2 A B C D E F G H I J K 3 4 5 6 7 8 9 10 11 12 13 14 15 Semiconductor Location Ref No Location Ref No Location D1 B 5 D2 C 5 D3 H 4 D4 D 6 D6 E 3 IC1 C 4 IC2 F 5 IC3 E 9 IC4 D 10 Ref No Location Ref No Location IC5 E 10 IC6 E 10 IC301 H 9 IC601 F 11 Q1 E 7 Q2 E 7 Q3 C 3 ...

Page 21: ...ND AM FM R DATA OUT F TUME R TUME R DATA IN HOLD SENS OSC CTL AMS IN PHOTO CTL PHOTO IN DDC1 CTL HOLD SW BATT DET KEY IN F R SW VCC AD REF CS M DATA I O M CLOCK BEEP MOTOR CTL Pin No 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 I O O I O O O O O O O O O O I I O O I O I I I O I Description MOTOR control terminal TAPE detect terminal L ON H OFF REC circui...

Page 22: ...ND AM FM R DATA OUT F TUME R TUME R DATA IN HOLD SENS OSC CTL AMS IN PHOTO CTL PHOTO IN DDC1 CTL HOLD SW BATT DET KEY IN F R SW VCC AD REF CS M DATA I O M CLOCK BEEP MOTOR CTL Pin No 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 I O O I O O O O O O O O O O I I O O I O I I I O I Description MOTOR control terminal TAPE detect terminal L ON H OFF REC circui...

Page 23: ...KNOB OPEN 9 3 029 220 11 SPRING TENSION 10 A 3021 356 A MAIN BOARD COMPLETE EXCEPT JE 10 A 3021 357 A MAIN BOARD COMPLETE JE 11 3 893 942 11 SCREW 1 7X3 TAPPING B 12 3 365 611 05 SCREW M1 4 13 3 029 213 01 TERMINAL BOARD BATTERY 14 3 029 210 01 TERMINAL BOARD MINUS 15 3 035 199 01 SHEET GR3 17 1 672 579 11 ATS FLEXIBLE BOARD 18 3 704 197 01 SCREW M1 4X1 6 LOCKING 19 3 034 074 11 RETAINER FLEXIBLE ...

Page 24: ...ion Remarks Ref No Part No Description Remarks 70 X 3377 584 1 CHASSIS ASSY F 71 3 010 274 02 TABLE REEL 72 3 010 954 01 SPRING BT COMPRESSION 73 3 029 282 01 GEAR Y 74 3 029 285 01 GEAR CAM 75 3 029 284 01 LEVER TRIGGER 76 3 029 281 01 GEAR IDLER B 77 3 010 273 02 GEAR REEL 78 3 029 273 01 GEAR FR 79 3 029 283 01 GEAR IDLER A 80 3 029 286 01 GEAR NR 81 3 029 288 01 PULLEY REVERSE 82 3 029 272 02 ...

Page 25: ...IC CHIP 0 022uF 10 25V C25 1 164 315 11 CERAMIC CHIP 470PF 5 00 50V C26 1 162 919 11 CERAMIC CHIP 22PF 5 50V C27 1 165 176 11 CERAMIC CHIP 0 047uF 10 00 16V C28 1 162 923 11 CERAMIC CHIP 47PF 5 50V C29 1 162 970 11 CERAMIC CHIP 0 01uF 10 25V C30 1 162 961 11 CERAMIC CHIP 330PF 10 50V C31 1 164 362 11 CERAMIC CHIP 470PF 5 00 50V C32 1 125 984 11 TANTAL CHIP 22uF 20 4V MAIN C33 1 115 156 11 CERAMIC ...

Page 26: ...uF 20 4V C526 1 115 156 11 CERAMIC CHIP 1uF 10V C527 1 115 156 11 CERAMIC CHIP 1uF 10V C528 1 117 181 11 TANTAL CHIP 4 7uF 20 00 2 5V C529 1 117 181 11 TANTAL CHIP 4 7uF 20 00 2 5V C530 1 115 156 11 CERAMIC CHIP 1uF 10V C531 1 115 156 11 CERAMIC CHIP 1uF 10V C532 1 164 230 11 CERAMIC CHIP 220PF 5 00 50V C533 1 164 230 11 CERAMIC CHIP 220PF 5 00 50V C534 1 125 984 11 TANTAL CHIP 22uF 20 4V C536 1 1...

Page 27: ...4 8 729 037 89 TRANSISTOR 2SC4627J C TX SO Q5 8 729 053 44 TRANSISTOR 2SK880 Y TE85R Q6 8 729 028 69 TRANSISTOR 2SC4655 BC TX Q7 8 729 037 89 TRANSISTOR 2SC4627J C TX SO Q8 8 729 037 64 TRANSISTOR UN9116J TX SO Q9 8 729 823 86 TRANSISTOR 2SA1745 Q10 8 729 037 89 TRANSISTOR 2SC4627J C TX SO Q11 8 729 037 63 TRANSISTOR UN9115J TX SO Q12 8 729 037 71 TRANSISTOR UN9210J TX SO Q13 8 729 037 71 TRANSIST...

Page 28: ... 16W R57 1 218 875 11 METAL CHIP 15K 0 5 1 16W R58 1 216 833 11 METAL CHIP 10K 5 1 16W R59 1 216 833 11 METAL CHIP 10K 5 1 16W R60 1 216 833 11 METAL CHIP 10K 5 1 16W R61 1 216 833 11 METAL CHIP 10K 5 1 16W R62 1 216 845 11 METAL CHIP 100K 5 1 16W R63 1 216 853 11 METAL CHIP 470K 5 1 16W R64 1 216 853 11 METAL CHIP 470K 5 1 16W R65 1 216 849 11 METAL CHIP 220K 5 1 16W R66 1 216 839 11 METAL CHIP 3...

Page 29: ...2 2K SWITCH S1 1 771 475 11 SWITCH SLIDE REV STOP FWD S2 1 572 922 11 SWITCH SLIDE HOLD S3 1 771 053 21 SWITCH KEY BOARD x RADIO OFF S4 1 771 053 21 SWITCH KEY BOARD FF PRESET S5 1 771 053 21 SWITCH KEY BOARD REW PRESET S6 1 771 053 21 SWITCH KEY BOARD MENU S7 1 771 053 21 SWITCH KEY BOARD SET S8 1 771 053 21 SWITCH KEY BOARD RADIO ON BAND S9 1 771 053 21 SWITCH KEY BOARD nN REPEAT S10 1 771 053 2...

Page 30: ...TION JAPANESE ENGLISH CHINESE KOREAN JE 3 222 162 11 MANUAL INSTRUCTION ENGLISH ARABIC GX688 CH EA 3 222 162 21 MANUAL INSTRUCTION ENGLISH CHINESE HK KR 3 222 162 31 MANUAL INSTRUCTION CHINESE KOREAN GX688 CH KR 3 222 162 41 MANUAL INSTRUCTION ENGLISH CHINESE E 3 222 163 01 POUCH CARRYING 8 953 304 90 RECEIVER MDR E805SP SET EXCEPT US 8 953 733 91 EAR RECEIVER MDR W034SP SET US A 3052 359 A REMOTE...

Page 31: ...WM GX670 GX674 MEMO ...

Page 32: ...o jump to the revised page 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 2000 11 New 1 1 2001 01 CEV model addition 1 2 2002 01 Correction of Part No for IC4 SPM 01041 ...