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WM-FX477/FX479

Note:
• All capacitors are in µF unless otherwise noted.  pF: µµF

50 WV or less are not indicated except for electrolytics
and tantalums.

C

: panel designation.

U

: B+ Line.

• Power voltage is dc 3 V and fed with regulated dc power

supply from battery terminal.
no mark : FM
(

) : PB

• Voltages are taken with a VOM (Input impedance 10 M

).

Voltage variations may be noted due to normal produc-
tion tolerances.

• Abbreviation

CND : Canadian model.
C&SA : Central and South America model.
CH

: Chinese model.

FR

: French model.

CEV

: Poland, Czech, Greece and Turkey model.

EE

: East European model.

9E

: No indication of country of origin.

E

: Indication of country of origin.

5-6. SCHEMATIC DIAGRAM — DISPLAY SECTION —

(Page 18)

Summary of Contents for Walkman WM-FX477

Page 1: ...33 4 mm 4 5 8 3 3 8 1 3 8 inches incl projecting parts and controls Mass Approx 175 g 6 2 oz Approx 255 g 9 0 oz incl batteries and a cassette Supplied accessories Stereo headphones or Stereo earphones 1 Carrying case 1 Design and specifications are subject to change without notice SPECIFICATIONS Model Name Using Similar Mechanism WM FX483 Tape Transport Mechanism Type MF WMFX483 147 Notes on Chip...

Page 2: ... ADJUSTMENTS 9 4 ELECTRICAL ADJUSTMENTS Tape Section 9 Tuner Section 10 5 DIAGRAMS 5 1 IC Pin Description 12 5 2 Block Diagram 14 5 3 Schematic Diagram Main Section 16 5 4 Printed Wiring Board Main Section 19 5 5 Printed Wiring Board Display Section 21 5 6 Schematic Diagram Display Section 23 6 EXPLODED VIEWS 6 1 Cabinet Section 26 6 2 Tape Mechanism Deck Section 28 7 ELECTRICAL PARTS LIST 29 ...

Page 3: ... 3 SECTION 1 GENERAL This section is extracted from instruction manual ...

Page 4: ... 4 ...

Page 5: ...T ASSY Note When installing fit the knobs and switches 3 Insert the precision screwdriver 1 4 mm flat blade into the slit at claw A and release the claw 4 Remove the cabinet front assy Release all claws B to K in alphabetical order The equipment can be removed using the following procedure Note Follow the disassembly procedure in the numerical order given Note When removing the cabinet put cloth o...

Page 6: ... cassette A B 5 spring torsion 2 four claws 3 DISPLAY board 1 screws 2 2 DISPLAY BOARD 2 3 HOLDER SUB ASSY CASSETTE 2 Insert a precision screwdriver 1 4 mm flat blade vertically into portion A to release the hinge plate 3 Portion B to release the hinge plate ...

Page 7: ...1 4x2 0 locking 6 MAIN board switch slider 2 5 MECHANISM DECK 2 4 MAIN BOARD Note When installing fit the switch and slider 2 Insert the precision screwdriver 1 4 mm flat blade into the slit and release three claws 4 Remove the mechanism deck in the direction of the arrow 1 screw 3 three claws ...

Page 8: ... 8 1 belt 3 motor wheel assy SP capstan belt How to apply the belt M901 2 two screws screw M1 4 special head 2 6 BELT AND MOTOR ...

Page 9: ...he adjustments should be performed with the rated power supply voltage 2 5 V unless otherwise noted Torque Measurement Mode Torque meter Meter reading FWD CQ 102C 20 42 g cm 0 28 0 58 oz inch FWD CQ 102C less than 2 g cm Back Tension less than 0 03 oz inch REV CQ 102RC 20 42 g cm 0 28 0 58 oz inch REV CQ 102RC less than 2 g cm Back Tension less than 0 03 oz inch FF REW CQ 201B more than 60 g cm mo...

Page 10: ...aximum reading on level meter L2 CT1 620 621 kHz 1 400 1 395 kHz Except US Canadian model TUNER SECTION 0 dB 1 µV FM Section Setting RADIO ON BAND switch FM FM Tuning Voltage Adjustment FM TUNING VOLTAGE ADJUSTMENT Adjust for a 9 0 14 5 0 5 Vdc reading on digital voltmeter L3 108 MHz FM Tracking Adjustment Modulation 1 kHz 75 kHz dev 100 Output level as low as possible FM TRACKING ADJUSTMENT Adjus...

Page 11: ...FM TUNING VOLTAGE ADJUSTMENT L1 FM TRACKING ADJUSTMENT L4 AM TUNING VOLTAGE ADJUSTMENT T1 AM IF ADJUSTMENT CT1 AM TRACKING ADJUSTMENT L2 Adjustment Location main board Measurement Points main board main board side B main board side A ...

Page 12: ...A BASS O MEGA BASS control output ON L OFF H 48 OPEN I OPEN detection input Open L Close H 49 BEEP O BEEP output 50 VER1 I Destination select input Fixed at L except EE E 9E or H EE E 9E in this set 51 VER2 I Destination select input Fixed at L US CND E 5E 6E 9E or H AEP FR EE CEV CH in this set 52 VER3 I Destination select input Fixed at L in this set 53 MBSET I MEGA BASS with without detection i...

Page 13: ...3 OPEN DET 48 BATT IN 38 BATT DET 42 VDD 72 RESET 73 AD REF 45 AMP CTL PHOTO CTL PHOTO IN 33 MOTOR DIR MOTOR SPEED MOTOR CTL X OUT X IN SYS CONT HOLD S701 S301 OPEN DET S601 MD CONT US CND C SA MODEL US CND C SA MODEL FUNCTION KEY S702 715 B OFF ON B P F MUTE Q306 FL1 DC IN 3V J302 DRY BATTERY SIZE AA IEC DESIGNATION R6 2PCS 3V D2 L3 FM OSC L4 AM OSC D3 CT1 DOLBY B SWITCH Q331 REW 56 REV D731 55 F...

Page 14: ...red with no cassette installed Power voltage is dc 3 V and fed with regulated dc power supply from battery terminal no mark FM AM PB Voltages are taken with a VOM Input impedance 10 MΩ Voltage variations may be noted due to normal pro duction tolerances Signal path F FM f AM E PB Abbreviation CND Canadian model C SA Central and South America model CH Chinese model FR French model CEV Poland Czech ...

Page 15: ...rough hole b Pattern from the side which enables seeing Abbreviation CND Canadian model C SA Central and South America model FR French model Page 21 Ref No Location D1 H 5 D2 G 9 D3 G 10 D401 B 4 D402 B 4 D731 C 9 IC1 H 10 IC301 D 11 IC331 E 3 PH701 E 5 Q2 H 10 Q51 D 9 Q52 D 9 Q53 E 9 Q101 F 11 Q201 F 11 Q301 E 4 Q302 D 12 Q303 F 12 Q304 D 5 Q305 D 5 Q331 F 2 Q401 B 2 Q602 E 10 Q603 D 9 Q604 B 4 Q...

Page 16: ...701 G 8 Q702 F 8 Q703 E 8 Semiconductor Location Page 19 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 Abbreviation CND Canadian model C SA Central and South America model CH Chinese model FR French model CEV Poland Czech Greece and Turkey model EE E...

Page 17: ...ply from battery terminal no mark FM PB Voltages are taken with aVOM Input impedance 10 MΩ Voltage variations may be noted due to normal produc tion tolerances Abbreviation CND Canadian model C SA Central and South America model CH Chinese model FR French model CEV Poland Czech Greece and Turkey model EE East European model 9E No indication of country of origin E Indication of country of origin 5 ...

Page 18: ...MO FM AM FM DET AM DET 1 8 LEVEL DET IF BUFF AF BUFF AF IF REQ SW ST 25 26 IC Block Diagrams IC1 TA2104 IC301 LB8115W TLM SECTION 6 EXPLODED VIEWS NOTE The mechanical parts with no reference number in the exploded views are not supplied Items marked are not stocked since they are seldom required for routine service Some delay should be anticipated when ordering these items XX and X mean standardiz...

Page 19: ...OMPLETE FX477 C SA 8 A 3021 210 A MAIN BOARD COMPLETE FX477 FR 9 3 030 022 01 TERMINAL BATTERY 10 3 704 197 11 SCREW M1 4X2 0 LOCKING 11 3 704 197 91 SCREW M1 4X1 8 LOCKING 12 3 892 535 11 SCREW 13 3 030 025 01 HOLDER LCD 14 3 030 018 01 BUTTON PRESET 15 X 3376 953 1 CABINET FRONT ASSY DX LOCAL SILVER FX479 US CND C SA 15 X 3376 954 1 CABINET FRONT ASSY ST MONO SILVER FX479 EXCEPT US CND C SA 15 X...

Page 20: ...75 024 1 CLUTCH ASSY F 57 3 021 951 01 GEAR CAM 58 3 348 953 21 WASHER 59 3 021 979 01 SPRING UDF COMPRESSION 60 3 021 949 01 GEAR BF 61 X 3375 022 1 CHASSIS ASSY F 62 3 021 974 01 SPRING HEAD BASE 63 3 703 816 31 SCREW M1 4 SPECIAL HEAD 64 X 3375 021 1 PINCH LEVER R F ASSY 65 3 703 816 73 SCREW M1 4 SPECIAL HEAD 66 3 921 797 01 WASHER 67 3 921 003 01 BEARING 68 3 022 100 01 SPRING B T COMPRESSION...

Page 21: ...712 1 162 917 11 CERAMIC CHIP 15PF 5 50V C713 1 162 917 11 CERAMIC CHIP 15PF 5 50V C714 1 107 823 11 CERAMIC CHIP 0 47uF 10 16V C715 1 107 826 11 CERAMIC CHIP 0 1uF 10 16V C716 1 107 826 11 CERAMIC CHIP 0 1uF 10 16V C717 1 107 823 11 CERAMIC CHIP 0 47uF 10 16V C718 1 115 416 11 CERAMIC CHIP 1000PF 5 25V C719 1 162 964 11 CERAMIC CHIP 0 001uF 10 50V C720 1 162 964 11 CERAMIC CHIP 0 001uF 10 50V C72...

Page 22: ...25 1 109 935 11 TANTAL CHIP 4 7uF 20 4V C27 1 124 434 00 ELECT 220uF 20 4V C28 1 162 974 11 CERAMIC CHIP 0 01uF 50V C29 1 115 467 11 CERAMIC CHIP 0 22uF 10 10V C30 1 115 416 11 CERAMIC CHIP 1000PF 5 25V C32 1 164 315 11 CERAMIC CHIP 470PF 5 50V C33 1 115 416 11 CERAMIC CHIP 1000PF 5 25V US CND C SA C34 1 164 315 11 CERAMIC CHIP 470PF 5 50V C35 1 162 970 11 CERAMIC CHIP 0 01uF 10 25V C36 1 162 970 ...

Page 23: ...D731 8 719 072 70 DIODE MA2ZD14001S0 FERRITE BEAD FB2 1 414 760 21 INDUCTOR FERRITE BEAD FB101 1 414 760 21 INDUCTOR FERRITE BEAD FB201 1 414 760 21 INDUCTOR FERRITE BEAD FB301 1 414 760 21 INDUCTOR FERRITE BEAD FB302 1 414 760 21 INDUCTOR FERRITE BEAD FILTER FL1 1 236 711 21 FILTER BAND PASS EXCEPT EE FL1 1 239 813 21 FILTER BAND PASS EE IC IC1 8 759 564 18 IC A2104AFN EL IC301 8 759 574 69 IC LB...

Page 24: ... EXCEPT US CND FR R107 1 216 808 11 RES CHIP 82 5 1 16W FR R107 1 216 864 11 METAL CHIP 0 5 1 16W US CND R108 1 216 811 11 METAL CHIP 150 5 1 16W EXCEPT US CND FR R108 1 216 813 11 METAL CHIP 220 5 1 16W FX477 US CND R108 1 216 815 11 METAL CHIP 330 5 1 16W FX479 US CND R108 1 216 820 11 RES CHIP 820 5 1 16W FR R109 1 216 825 11 METAL CHIP 2 2K 5 1 16W R201 1 216 841 11 METAL CHIP 47K 5 1 16W R202...

Page 25: ... 829 11 METAL CHIP 4 7K 5 1 16W VARIABLE RESISTOR RV301 1 225 759 21 RES VAR CARBON 10K 10K VOL RV601 1 241 784 11 RES ADJ CARBON 5K SWITCH S301 1 771 040 21 SWITCH PUSH OPEN DET S601 1 692 370 11 SWITCH SLIDE MD CONT TRANSFORMER T1 1 416 594 11 TRANSFORMER IF T401 1 449 021 21 TRANSFORMER DC DC CONVERTER THERMISTOR POSITIVE TH601 1 810 794 11 THERMISTOR POSITIVE FILTER X1 1 767 830 11 FILTER CERA...

Page 26: ... 34 Sony Corporation Personal A V Products Company 9 926 959 11 WM FX477 FX479 99B0482 1 Printed in Japan C1999 2 Published by Quality Engineering Dept Shinagawa ...

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