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Sony Walkman WM-EX422, Service Manual

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Sony Walkman WM-EX422 Service Manual Download Page 5

5

WM-EX422

SECTION 3

DISASSEMBLY

Note :

 Follow the disassembly procedure in the numerical order given.

3-1. CABINET (FRONT) SUB ASSY

z

 

The equipment can be removed using the following procedure.

MAIN board

Cabinet center   

Cassette holder sub assy

Mechanism deck

Set

Cabinet (front) sub assy

8

 Cabinet (front) sub assy

6

 Claws

5

 Claws

7

1

2

 Screw (B 1.7 

×

 9), tapping

4

 Claws

3

 Screw (B 1.7 

×

 9), tapping

Cabinet center

Summary of Contents for Walkman WM-EX422

Page 1: ...l projecting parts and controls Mass Approx 124 g 4 4 oz main unit only Supplied accessories Stereo headphones or earphones 1 Hand strap 1 European model only Carrying pouch 1 Asian model only Design and specifications are subject to change without notice Battery life approximate hours Sony alkaline LR6 SG Sony R6P SR Tape playback 35 9 Measured value by the standard of JEITA Japan Electronics and...

Page 2: ...6 EXPLODED VIEWS 6 1 Cabinet Section 13 6 2 Mechanism Deck Section MF WMFX495 147 14 7 ELECTRICAL PARTS LIST 15 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 c...

Page 3: ... set to the center position If not set the preset state as follow 2 Move the MD switch S601 to the side which the slider NRA is facing 3 The slider NRA will move when the regulated power supply switch is set to OFF once and then set to ON Move the MD switch S601 according to this timing and set to the center position 3 FF REW modes 1 Check that the preset state is set 2 Input the square wave or si...

Page 4: ...ed from instruction manual OPEN AVLS BATT VOL FF Y DIRECTION HOLD MEGA BASS x REW Supplied with the European model only There is a tactile dot beside VOL to show the direction to turn up the volume The button has a tactile dot i To attach the hand strap ...

Page 5: ...en 3 1 CABINET FRONT SUB ASSY z The equipment can be removed using the following procedure MAIN board Cabinet center Cassette holder sub assy Mechanism deck Set Cabinet front sub assy 8 Cabinet front sub assy 6 Claws 5 Claws 7 1 2 Screw B 1 7 9 tapping 4 Claws 3 Screw B 1 7 9 tapping Cabinet center ...

Page 6: ... MECHANISM DECK 3 Mechanism deck Cabinet center assy 1 Claws 2 3 2 MAIN BOARD Cabinet center assy 1 Unsolder HEAD flexible board 3 Screw 1 7 2 5 tapping 2 Unsolder leads from motor four places 6 MAIN board 5 4 Claws ...

Page 7: ...er Use caution when installing the cassette holder assy Install the cassette holder sub assy with the spring lid up as shown below in the drawing so that it fits into the holes on the cabinet center Once installed fit the left and right pieces on Press on the left right clips from the rear of the cabinet center and remove the boss 2 1 ...

Page 8: ... m less than 2 g cm back tension less than 0 027 oz inch FF REW CQ 201B more than 5 89 mN m more than 60 g cm more than 0 84 oz inch SECTION 4 ADJUSTMENTS 4 2 ELECTRICAL ADJUSTMENTS PRECAUTION Supplied voltage 1 5V Switch and control position MEGA BASS NORMAL VOLUME control RV301 maximum AVLS OFF HOLD OFF PB EQ NORMAL TAPE SECTION Test Tape Type Signal Used for WS 48A 3kHz 0dB Tape Speed Adjustmen...

Page 9: ...YSTEM CONTROL IC703 RESET IC701 1 2 SYSTEM CONTROL IC601 CAPSTAN REEL MOTOR DRIVE IN PHOTO 1 FWD SW 2 FF SW 3 REW SW 4 REV SW 2 5V BATT_CTL2 BATT_CTL3 NC KEY_IN ENDRESS MODE XTO XTI BEEP Q303 EQ SWITCH X701 32 768KHz R CH R CH RV601 TAPE SPEED S705 REW S704 FF S702 x S703 Y DIRECTION S701 HOLD B ON R OFF IN M601 CAPSTAN REEL MOTOR S301 TAPE DET BATT 1 5V DRY BATTERY SIZE AA IEC DESIGNATION LR6 1PS...

Page 10: ...B B B B DIRECTION i C323 R610 R605 R611 S301 TAPE SW C608 R209 PH751 R207 C106 C201 C103 R751 R208 C110 R720 R305 R211 C322 R107 C610 R603 R110 1 15 16 30 C108 C107 R204 C310 R109 Q302 R311 C109 C207 C104 C308 C203 R206 C330 C312 R755 R210 R106 Q703 Q303 C304 IC301 C306 C208 C316 R111 R203 C325 R103 C210 R306 R330 C301 R104 R108 R609 C101 R105 C204 C324 Q305 BEB C C C305 R333 C307 C209 R331 C206 R...

Page 11: ...2k 22k 10k 22k 100k 4700p 470 22 4V 470k 470k 100k 4700p 1000p 22 4V 1k 1 1 1000p 1000p 1 1k 1k 100k 22 1k 1k 2 2 470p 470p 100k 100k XP1116 TX AVLS CONTROL SWITCH 0 22 0 1 1 2 2 10 6 3V 2 2 2 2 10k 4 7k 4 7k 0 047 0 MA8062 220k 220k 220k 0 01 0 01 0 1 100 0 1 0 22 22k 1 0 01 UN5215 SPEED CONTROL SWITCH 3 3K 0 1 MA8062 2SA1036KT146Q 2SA1036KT146Q 2SA1036KT146Q 470 10k 100k 330 2V 0 1k 2 2 470k 0 5...

Page 12: ...enables seeing The other layers patterns are not indicated Caution Pattern face side Parts on the pattern face side seen from the Side B pattern face are indicated Parts face side Parts on the parts face side seen from the Side A parts face are indicated z Waveforms 1 IC701 9 VOLT DIV 1V AC TIME DIV 20msec PHOTO CTRL 1 0 Vp p 125msec 2 IC701 wl XT1 VOLT DIV 0 5V AC TIME DIV 10 µsec 1 3Vp p 32 768 ...

Page 13: ...BINET FRONT SUB ASSY 4 3 252 498 01 LID BATTERY 5 X 3383 898 1 LEVER OPEN ASSY 6 3 349 825 11 SCREW 8 3 022 856 01 SPRING KNOB TENSION 9 3 704 197 91 SCREW M1 4X1 8 LOCKING 10 3 019 422 03 JOINT 11 3 252 499 01 KNOB OPEN SILVER 11 3 252 499 11 KNOB OPEN BLUE 12 3 252 500 01 KNOB HOLD SILVER 12 3 252 500 11 KNOB HOLD BLUE 13 3 252 494 21 CABINET CENTER SILVER 13 3 252 494 31 CABINET CENTER BLUE 14 ...

Page 14: ...21 982 01 SPRING MODE COMPRESSION 106 X 3375 024 4 CLUTCH ASSY F 107 3 021 951 02 GEAR CAM 108 3 348 953 21 WASHER 109 3 021 979 02 SPRING UDF COMPRESSION 110 3 021 949 01 GEAR BF 111 X 3375 022 7 CHASSIS ASSY F 112 3 021 974 04 SPRING HEAD BASE 113 3 704 197 01 SCREW M1 4 SPECIAL HEAD 114 X 3375 021 3 PINCH LEVER R F ASSY 115 3 704 197 71 SCREW M1 4 116 3 921 797 01 WASHER 117 3 338 647 31 WASHER...

Page 15: ...0 22uF 10 10V C309 1 164 156 11 CERAMIC CHIP 0 1uF 25V C310 1 165 128 11 CERAMIC CHIP 0 22uF 16V C311 1 117 720 11 CERAMIC CHIP 4 7uF 10V C312 1 135 834 91 CERAMIC CHIP 2 2uF 6 3V C316 1 115 156 11 CERAMIC CHIP 1uF 10V C322 1 115 416 11 CERAMIC CHIP 0 001uF 5 25V C323 1 135 834 91 CERAMIC CHIP 2 2uF 6 3V C324 1 104 847 11 TANTAL CHIP 22uF 20 4V C325 1 135 834 91 CERAMIC CHIP 2 2uF 6 3V C330 1 115 ...

Page 16: ... 10W R610 1 216 849 11 METAL CHIP 220K 5 1 10W R611 1 216 849 11 METAL CHIP 220K 5 1 10W R700 1 218 895 11 METAL CHIP 100K 0 5 1 10W R701 1 218 903 11 METAL CHIP 220K 0 5 1 10W R702 1 218 911 11 METAL CHIP 470K 0 5 1 10W R704 1 216 853 11 METAL CHIP 470K 5 1 10W R705 1 216 833 11 METAL CHIP 10K 5 1 10W R706 1 218 895 11 METAL CHIP 100K 0 5 1 10W R707 1 218 871 11 METAL CHIP 10K 0 5 1 10W R708 1 21...

Page 17: ... Remark MISCELLANEOUS HP601 1 500 648 11 HEAD MAGNETIC PLAYBACK M601 1 763 798 11 MOTOR DC CAPSTAN REEL ACCESSORIES 3 220 749 01 CASE CARRYING 3 253 260 41 MANUAL INSTRUCTION ENGLISH TRADITIONAL CHINESE 8 954 008 93 RECEIVER EAR MDR E808LP ...

Page 18: ...lows you to 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 2003 02 New 1 1 2003 12 Change of exploded views Ref No 5 RPC 03002 ...

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