Sony Walkman WM-GX677 Service Manual Download Page 28

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WM-GX677

Sony Corporation

Personal A&V Products Company

99C1670031-1

Published by Quality Engineering Dept.

(Shinagawa)

9-926-957-11

www. xiaoyu163. com

QQ 376315150

TEL 13942296513

TEL 13942296513 QQ 376315150 892498299

http://www.xiaoyu163.com

Summary of Contents for Walkman WM-GX677

Page 1: ...rophone MIC jack Minimum input level 0 4 mV General Power requirements 1 5 V Rechargeable battery One R6 size AA battery Dimensions w h d Approx 108 4 77 7 23 8 mm 43 8 31 8 15 16 inches incl projecting parts and controls Mass Approx 150 g 5 3 oz Approx 215 g 7 6 oz incl rechargeable battery and a cassette Accessories Battery charger Battery case Stereo earphones with remote control Carrying pouch...

Page 2: ...ANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY TABLE OF CONTENTS 1 SERVICE NOTE 3 2 GENERAL 5 3 DISASSEMBLY 3 1 Case Block Assembly 6 3 2 Belt F2 7 3 3 Cassette Lid Assembly 7 3 4 Reel Ornament Assembly 8 3 5 Main Board 8 3 6 Motor M601 9 3 7 Holder Assembly 9 3 8 Pinch Lever N R Assembly 10 3 9 Magnetic Head HP901 10 4 MECHANICAL ADJUSTMENT 11 5 ELECTRICAL ADJUSTMENT 11 6 DIAGRAMS 6 1 Block Diagram 13...

Page 3: ...r position When these switches are not in the center position set them to the PRE SET status as follows 2 Move the FWD REV switch S1 to the same position as the slider NR is set 3 The slider NR can be moved 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 ...

Page 4: ...ywheel 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 Flywheel R Cam Gear Gear Y Gear FR REW Right side www xiaoyu163 com QQ376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2...

Page 5: ...OLD c knob SET button MENU button BAND RADIO ON button ENTER COUNTER RESET button 1 Headhones plug 2 MENU button 3 HOLD button 4 VOL knob 5 REC button 6 DISPLAY window 7 JOG lever This section is extracted from instruction manual www xiaoyu163 com QQ376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 37631515...

Page 6: ...block assembly in the direction of the arrow 4 Two screws M1 4 2 5 knob HOLD Claw S11 S501 S2 Note When assembling the case block assembly align the knob HOLD with the position of S2 knob ISS Note When assembling the case block assembly align the knob ISS with the position of S501 knob REC Note When assembling the case block assembly align the knob REC with the position of S11 www xiaoyu163 com QQ...

Page 7: ...LID ASSEMBLY 5 Cassette lid assembly 4 Shaft 3 Open the cassette lid 1 Screw M1 4 2 0 2 Two screws M1 4 2 0 www xiaoyu163 com QQ376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http www xiaoyu163 com http www xiaoyu163 com ...

Page 8: ... 3 tapping 3 Screw 1 4 1 6 2 Screw M1 4 7 Screw M1 4 Toothed lock 1 Head flexible board 4 Screw M1 4 9 Remove soldeing four points from motor When assembling the MAIN board align the slider with the position of S1 Note S1 www xiaoyu163 com QQ376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498...

Page 9: ...B 9 Remove the holder assembly in the direction of the arrow 5 Lock lever S 8 Flexible board 7 Cassette bracket assembly www xiaoyu163 com QQ376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http www xiaoyu163 com http www xiaoyu163 com ...

Page 10: ...ection of the arrow Note Be careful of the claw 3 9 MAGNETIC HEAD HP901 1 Two screws M1 4 7 2 2 Remove the magnetic head HP901 in the direction of the arrow www xiaoyu163 com QQ376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http www xiaoyu163 com http www xiaoyu163 com ...

Page 11: ...o the parts adjusted 5 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 ...

Page 12: ...ire 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 counter 1µF 100kΩ TP5 IC2 Pin TP6 IC2 Pin 9 0dB 1µV Adjustment Location MAIN board See page 11 AM IF ADJUSTMENT A...

Page 13: ...ME w w w x i a o y u 1 6 3 c o m Q Q 3 7 6 3 1 5 1 5 0 9 9 2 8 9 4 2 9 8 T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http www xiaoyu163 com http www xiaoyu163 com ...

Page 14: ... 17 IC302 E 9 IC501 D 7 IC601 D 19 IC801 D 3 Q1 D 16 Q2 C 16 Q3 B 13 Q4 B 14 Q5 D 15 Q6 C 15 Q7 B 13 Q8 C 16 Q9 D 6 Q10 C 13 Q11 D 15 Q12 E 16 Q13 E 13 Ref No Location Q14 B 13 Q15 C 4 Q16 C 15 Q17 C 15 Q18 F 15 Q19 F 16 Q20 C 6 Q301 E 19 Q302 F 16 Q303 F 16 Ref No Location Ref No Location Q304 F 9 Q305 F 9 Q501 G 4 Q502 G 9 Q503 G 9 Q504 G 5 Q505 F 6 Q506 F 5 Q507 F 6 Q508 G 12 Q509 D 8 Q510 G 4 ...

Page 15: ...M AM PLAY TAPE Voltages are taken with aVOM Input impedance 10 MΩ Voltage variations may be noted due to normal produc tion tolerances Waveforms are taken with a oscilloscope Voltage variations may be noted due to normal produc tion tolerances Circled numbers refer to waveforms Signal path F FM E PLAY TAPE a REC TAPE Waveform 51 7kHz 1TP32 10µsec div 5V div 1 2 A B C D E F G H I 3 4 5 6 7 8 9 10 1...

Page 16: ...ges are taken with aVOM Input impedance 10 MΩ Voltage variations may be noted due to normal produc tion tolerances Waveforms are taken with a oscilloscope Voltage variations may be noted due to normal produc tion tolerances Circled numbers refer to waveforms Signal path F FM E PLAY TAPE a REC TAPE 2 IC2 VCO 5µsec div 50mV div 3IC801 5 PLAY 5µsec div 1V div 75kHz 4 IC3 XOUT 5µsec div 0 5V div Wavef...

Page 17: ...FWD REV REC PLAY CONT F CONT A FWD PLAY REV REV PLAY FWD PLAY FWD REV REV PLAY FWD PLAY REC CONT B CONT C CONT D CONT E N C N C MIC REG REF MIC REG REC BIAS REG REF REC BIAS REG OSC BASE VCC1 VCCRF ALC GND N C SYSTEM CONTROL V REF REV REC AMP FWD REC AMP MONITOR AMP DET MIC REGULATOR REC BIAS REGULATOR ALC AMP L ALC AMP R VCC2 REC VREF OSC VCC GND IF OUT IF REQ SP OUT 1 2 FM IF IN MIX 3 4 5 AM IF ...

Page 18: ... GND 47 VREF IN 48 PRE SW 45 AMS OUT 40 BEEP 39 26 27 28 29 30 31 32 33 34 DET 36 AGC IN 35 EQ B 25 RIPPLE FILTER AGC DET BEEP VREF SWITCH COMPARATOR MTL DRV V 1 PW 2 W 3 GND 4 OSC 5 DR 6 VREF 7 START 8 VSP 9 IN 10 PV 20 U 19 PU 18 GND 17 VCC 16 FC 15 TC1 14 TC2 13 R1 12 OUT 11 MOTIVE CONTROL CIRCUIT MOTIVE OSC MOTIVE LOGIC SOFT SWITCH PRE DRIVER INVERTER BIAS REFERENCE VOLTAGE SPEED CONTROL CURRE...

Page 19: ...al Tape sound existing or not exiting detect L Music exists H Music does not exist Terminal for controlling the rotation detect circuit Rotation detect input DDC control terminal H DDC ON HOLD detect input L HOLD ON Voltage detect input KEY input terminal TAPE rotating direction detect terminal AD IN 1 2 3 reference viltage interrupt terminal E2 PROM CS control terminal E2 PROM DATA I O E2 PROM CL...

Page 20: ...y input FM MONO STEREO select terminal H MONO L ST Power supply Ground terminal FM local oscillator input AM local oscillator input Power supply voltage RESET terminal H during operation Terminal to which external oscillator is connected Terminal to which external capacitor is connected to stabilize crystal oscillator power supply Terminal to step up power supply voltage for LCD drive 3V Terminal ...

Page 21: ...66 892 01 SCREW M1 4 13 3 029 213 01 TERMINAL BOARD 14 3 029 210 01 TERMINAL BOARD MINUS 15 3 035 199 01 SHEET GR3 17 1 672 579 11 FLEXIBLE ATS BOARD 18 3 704 197 03 SCREW M1 4 1 6 LOCKING 19 3 034 074 01 RETAINER FLEXIBLE 20 3 328 483 11 SHEET 21 X 3376 277 1 BRACKET ASSY 23 3 029 205 01 COVER MD 24 3 029 217 01 LEVER B LOCK 25 3 366 892 11 SCREW M1 4 1 4 26 X 3376 278 1 TERMINAL BOARD ASSY BATTE...

Page 22: ... 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 83 3 032 575 01 LEVER HEAD 84 3 704 413 31 SCREW M1 4 7 2 HP901 1 500 355 21 HEAD MAGNETIC REC PB ERAS...

Page 23: ... 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 50V C32 1 125 984 11 TANTAL CHIP 22uF 20 4V C33 1 115 156 11 CERAMIC CHIP 1uF 10V C34 1 115 156 11 CERAMIC CHIP 1uF 10V C35 1 162 970 11 CERAMIC CHIP 0 01uF 10 25V MAIN C36 1 115 156 11 CERAMIC CHIP 1uF 10V C37 1 164 227 11 CERAMIC CHIP 0 022uF 10 25V C38 1 107 826 11 CERAMIC CHI...

Page 24: ...HIP 22uF 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 2 5V C529 1 117 181 11 TANTAL CHIP 4 7uF 20 2 5V C530 1 115 156 11 CERAMIC CHIP 1uF 10V C531 1 115 156 11 CERAMIC CHIP 1uF 10V C532 1 162 957 11 CERAMIC CHIP 220PF 5 50V C533 1 162 957 11 CERAMIC CHIP 220PF 5 50V C534 1 125 984 11 TANTAL CHIP 22uF 20 4V C536 1 115 156...

Page 25: ...SISTOR 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 TL 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 TRANSISTOR UN9210J TX SO Q14 8 729 037 89 TRANSISTOR 2SC4627J C TX SO Q15 8 729 425 46 TRANSISTOR XP4315 TXE Q...

Page 26: ...RES CHIP 10K 5 1 16W R59 1 216 833 11 RES CHIP 10K 5 1 16W R60 1 216 833 11 RES CHIP 10K 5 1 16W R61 1 216 833 11 RES 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 33K 5 1 16W R67 1 216 839 11 METAL CHIP 33K 5 1 16W R68 1 216 825 11 META...

Page 27: ...AR CARBON 30K 30K VOL RV601 1 223 584 11 RES ADJ CARBON 2 2K SWITCH S1 1 771 475 21 SWITCH SLIDE REV STOP FWD S2 1 572 922 11 SWITCH SLIDE HOLD S3 1 771 053 21 SWITCH KEY BOARD p RADIO OFF S4 1 771 053 21 SWITCH KEY BOARD FF AMS S5 1 771 053 21 SWITCH KEY BOARD REW AMS 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 BAND S9 1 771 053 21 S...

Page 28: ...1999 3 Published by Quality Engineering Dept Shinagawa 9 926 957 11 www xiaoyu163 com QQ376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http www xiaoyu163 com http www xiaoyu163 com ...

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