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Sony Walkman WM-FX481, Service Manual

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3

WM-FX481

SECTION 2

DISASSEMBLY

Note :

 Follow the disassembly procedure in the numerical order given.

2-1. CABINET (FRONT), CABINET (CENTER) SUB ASSY

2-2. MAIN BOARD

z

 

The equipment can be removed using the following procedure.

Main board

Cabinet (center) sub ASSY  

Cassette holder 

Mechanism deck

Belt, Capstan/reel motor (M601)
Magnetic head (playback) (HP601)

Set

Cabinet (front)

Note :

 Use the precision driver with coverd a point

 by cloth to release the claw.
 Be careful not to damage claws.

Cabinet (Front) 

Cabinet (center) sub ASSY

Cassette holder

4

 Claw

4

 Claw

2

5

1

 Claws

1

 Claws

3

 Claws

1

 Claws

Main board

1

 Screw

Orange

Black
White

Red

Cabinet (center) sub ASSY

Head flexible board

2

 Remove solder

3

 Claws

4

www. xiaoyu163. com

QQ 376315150

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9

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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

Summary of Contents for Walkman WM-FX481

Page 1: ...200 1 2001 4 Sony Corporation Personal Audio Company Shinagawa Tec Service Production Group Abbreviation CH Chinese 9E No Indication of country of origin 5E 6E Indication of country of origin 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 htt...

Page 2: ...FX467 114 CH MF WMFX281 114 5E 6E 9E 16 6 ELECTRICAL PARTS LIST 17 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 disconnect...

Page 3: ...ont Note Use the precision driver with coverd a point by cloth to release the claw Be careful not to damage claws Cabinet Front Cabinet center sub ASSY Cassette holder 4 Claw 4 Claw 2 5 1 Claws 1 Claws 3 Claws 1 Claws Main board 1 Screw Orange Black White Red Cabinet center sub ASSY Head flexible board 2 Remove solder 3 Claws 4 www xiaoyu163 com QQ376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 ...

Page 4: ... to apply the belt Capstan reel motor M601 2 Belt Stopper 1 Claw 6 magnetic head PLAYBACK HP601 4 Capstan reel motor M601 3 Screws M1 4 5 Screws M1 4 Mechanism deck 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 5: ...enter sub ASSY Hinge Projection Projection Hinge Hinge Projection Projection 3 Move the hinge away from projection 2 Move the hinge away from projection L shape slot Spring torsion Hinge Hinge Cassette holder Cabinet center sub ASSY 1 2 4 3 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 ...

Page 6: ...ECAUTION Supplied voltage 2 5V Switch and control position MENU display MEGA BASS OFF VOLUME control RV301 maximum AVLS OFF No indicated FM MODE 5E 6E DX No indicated 9E CH STEREO No indicated Abbreviation CH Chinese 9E No Indication of country of origin 5E 6E Indication of country of origin TAPE SECTION Test Tape Type Signal Used for WS 48A 3kHz 0dB Tape Speed Adjustment Tape Speed Adjustment Pro...

Page 7: ...n each adjustment several times and the frequency coverage and tracking adjustments should be finally done by the trimmer capacitors AM RF signal generator 30 amplitude modulation by 400Hz signal Output level as low as possible Put the lead wire antenna close to the set set 16 Ω phones jack J301 level meter Frequency Coverage Adjustment Setting J301 i 9E CH 5E 6E JR3 C40 R207 FB301 FB201 FB101 C35...

Page 8: ...ier frequency 98MHz 33 75kHz frequency deviation by 1kHz signal Modulation L R Output level as low as possible TP FM IN 0 01µF set 16 Ω phones jack J301 level meter IC1 MAIN BOARD SIDE A RV1 FM VCO Adjustment L7 AM Frequency Coverage Adjustment RV2 AM IF Adjustment L4 FM Tracking Adjustment L3 AM Tracking Adjustment CT1 AM Tracking Adjustment www xiaoyu163 com QQ376315150 9 9 2 8 9 4 2 9 8 TEL 139...

Page 9: ...t 26 MEGA BASS O MEGA BASS ON signal output 27 MUTE O Mute ON signal output 28 TAPE I Tape ON input 29 PRE CTL O Preamplifier control output 30 44 S1 15 O LCD segment output 45 48 COM1 4 O LCD common output 49 52 DBR1 4 LCD power supply 53 RESET I Reset input Fixed H 54 TU VCC Power supply 55 VDD Power supply 56 FM IN I FM osc frequency input 57 AM IN I AM osc frequency input 58 VSS Ground termina...

Page 10: ...IN E O FM IN TAPE SELECTOR SWITCH Q301 R CH LCH RCH RCH LCH REV FWD HEAD PLAYBACK VREF W V U CAPSTAN REEL MOTOR COM M VCC IN TAPE SPEED VOLUME POWER IN L POWER OUT R POWER OUT L POWER OUT COM R CH MIX IN L PRE OUT L PRE NF L SYSTEM CONTROL IC702 PRE AMP MEGA BASS HEADPHONE AMP MOTOR CONTROL IC301 IC1 L4 L7 R CH IS OMITTED SAME AS L CH VREF VREF L3 CT1 MIX OUT L R CH H P IN L REV IN L REV IN R FWD ...

Page 11: ...k 0 047 6 8k 6 8k 0 LB8115W NB TLM 100p 470 470p 0 47 470p 470p 10k 10k 10k 10k 2p 1000p 100p 0 1k 2SC4154 10k 2SB970 XN1501 75kHz 0 1 0 1 1M 100 N R SW TAPE ON 0 10k 3 3K 1k 10k 10k 330 330 XN1501 T X AVLS 10k 10k 1 1 XN4215 4 7k 1K 0 1 B 1k 1k 1SS314 0 AM OSC FM RF 2SC3931 LPF SYSTEM CONTROL 1 22 6 3V 47 0 01 1000p 1000p 0 1 2 2 30nH LCH RCH RCH LCH REV FWD MPRM V12M MUTE AAGC DETO MPXI PLT2 PLT...

Page 12: ...22 C501 C20 R703 Q301 R202 C607 IC1 CT1 RV1 C75 R715 R22 L1 L2 R717 C74 IC701 RV2 JC5 R7 C8 IC301 R8 R40 Q4 5E 6E FB302 37 36 48 1 12 13 25 24 40 31 30 21 20 11 1 10 5E 6E D2 C 9 D4 D 8 IC1 C 8 IC301 E 4 IC701 E 6 IC702 D 5 Q3 D 8 Q4 F 6 Q301 E 5 Q501 C 3 Q502 B 3 Q701 B 4 4 4 PRINTED WIRING BOARDS MAIN SECTION SIDE A Note X parts extracted from the component side a Through hole f internal compone...

Page 13: ...3 TUNER VCC AMP ON PA0 PB2 VDD MUTE B FM IN S707 SET S710 MENU RV301 VOLUME w L CH R CH R CH L CH FWD REV HP601 PLAYBACK HEAD LCD701 LIQUID CRYSTAL DISPLAY PANEL RV601 TAPE SPEED MAIN BOARD SIDE B 11 11 1 680 404 S713 AM S702 TUNING S705 TUNING S706 PRESET S703 PRESET S712 FM 4 5 PRINTED WIRING BOARDS MAIN SECTION SIDE B Note X parts extracted from the component side a Through hole Pattern from th...

Page 14: ...itions no mark FM 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 Signal path F FM f AM E PB Abbreviation CH Chinese 9E No Indication of country of origin 5E 6E Indication of country of origin z Waveforms 1...

Page 15: ...B HOLD 4 3 227 268 01 BUTTON PRESET 5 3 015 285 01 SCREW M1 4 TOOTHED LOCK WH 6 A 3021 379 A MAIN BOARD COMPLETE 9E CH 6 A 3021 418 A MAIN BOARD COMPLETE 5E 6E 7 3 044 865 01 STOPPER 8 3 007 006 21 BUTTON STOP 9 3 007 004 21 BUTTON FF 10 3 030 054 01 BUTTON PLAY 11 3 007 005 21 BUTTON REW 12 3 228 508 31 CASSETTE HOLDER 13 3 007 012 01 SPRING TORSION 14 X 3380 184 1 CABINET CENTER SUB ASSY 5E 6E C...

Page 16: ...169 1 CLUTCH ASSY 114 3 920 990 21 SPRING UD COMPRESSION 115 3 921 335 01 WASHER LEVER 116 3 923 530 11 SLEEVE M 117 3 728 091 01 WASHER STOPPER 118 3 921 052 11 LEVER A DETECTION 119 3 920 994 11 SPRING D SELECTION 120 3 929 419 01 LEVER BR DETECTION 121 3 704 197 01 SCREW M1 4 SPECIAL HEAD 122 3 921 023 01 LEVER M SELECTION 123 X 3369 748 1 PINCH LEVER R ASSY 124 3 920 997 01 SPRING PINCH R 125 ...

Page 17: ...1 CERAMIC CHIP 2PF 0 25PF 50V C26 1 162 964 11 CERAMIC CHIP 0 001uF 10 50V C28 1 162 964 11 CERAMIC CHIP 0 001uF 10 50V C29 1 162 915 11 CERAMIC CHIP 10PF 0 5PF 50V C30 1 126 791 11 ELECT 10uF 20 16V C31 1 162 970 11 CERAMIC CHIP 0 01uF 10 25V C32 1 162 964 11 CERAMIC CHIP 0 001uF 10 50V C33 1 162 964 11 CERAMIC CHIP 0 001uF 10 50V C34 1 162 964 11 CERAMIC CHIP 0 001uF 10 50V C35 1 162 927 11 CERA...

Page 18: ...RRITE ROD AM TRACKIG L4 1 424 763 11 COIL RF FM FM TRACKING L6 1 469 781 21 INDUCTOR 30nH L7 1 419 540 11 COIL OSCILLATION AM AM FREQUENCY COVERAGE L402 1 412 033 11 INDUCTOR CHIP 220uH L702 1 412 995 21 INDUCTOR 22uH TRANSISTOR Q3 8 729 423 52 TRANSISTOR 2SC3931 C Q4 8 729 602 21 TRANSISTOR 2SC4154 F 5E 6E Q200 8 729 402 13 TRANSISTOR XN1501 Q301 8 729 422 54 TRANSISTOR XN4215 Q501 8 729 046 90 T...

Page 19: ... METAL CHIP 10K 5 1 16W R715 1 216 833 11 METAL CHIP 10K 5 1 16W R716 1 216 833 11 METAL CHIP 10K 5 1 16W R717 1 216 857 11 METAL CHIP 1M 5 1 16W R718 1 216 833 11 METAL CHIP 10K 5 1 16W R720 1 216 829 11 METAL CHIP 4 7K 5 1 16W R721 1 216 833 11 METAL CHIP 10K 5 1 16W R722 1 216 845 11 METAL CHIP 100K 5 1 16W R731 1 216 821 11 METAL CHIP 1K 5 1 16W VARIABLE RESISTOR RV1 1 223 258 11 RES CARBON AD...

Page 20: ...he revised page allows you to jump to the next revised page Ver Date Description of Revision 1 0 2001 04 New 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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