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Sony WM-PSY02 Service Manual

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SERVICE MANUAL
Ver 1.0 1999.03
MICROFILM
WM-PSY02
SPECIFICATIONS
• Frequency range
For U area indication: FM: 87.5-108MHz
AM: 530-1710kHz
For E area indication: FM: 87.5-108MHz
AM: 531-1602kHz
• Power requirements
3V DC batteries AA (R6) × 2/External DC 3V
power sources
• Dimensions
115 × 90.5 × 34.4mm (4
× 3
5
5
/
/
8
incl. projecting parts and controls
• Mass
Approx. 150g (5.3 oz)
Approx. 230g (8.2 oz) incl. batteries and a tape
• Supplied accessories
Stereo headphones or earphones (1) /
Bumper guard (1)/Chain (1)
Design and specifications are subject to change without notice.
Canadian Model
Model Name Using Similar Mechanism WM-FX251
Tape Transport Mechanism Type
3
1
/
inches) (w/h/d)
8
8
RADIO CASSETTE PLAYER
US Model
MF-WMFX251-114

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Summary of Contents for Sony WM-PSY02

  • Page 1 WM-PSY02 SERVICE MANUAL US Model Canadian Model Ver 1.0 1999.03 Model Name Using Similar Mechanism WM-FX251 Tape Transport Mechanism Type MF-WMFX251-114 SPECIFICATIONS • Frequency range For U area indication: FM: 87.5-108MHz AM: 530-1710kHz For E area indication: FM: 87.5-108MHz AM: 531-1602kHz •...

  • Page 2: Table Of Contents

    TABLE OF CONTENTS SERVICING NOTES HOW TO CHANGE THE CERAMIC FILTERS Specifications ................1 This model is used two ceramic filters of CF2 and X2. You must used same type of color marked ceramic filters in order 1. GENERAL ..............2 to meet same specifications.

  • Page 3: Disassembly

    SECTION 2 DISASSEMBLY The equipment can be removed using the following procedure. Cabinet (Front) ASSY Main board Mechanism deck Belt, Motor (Capstan/Reel) (M901), (MF-WMFX251-114) Playback head (HP901) Cassette holder Note : Follow the disassembly procedure in the numerical order given. 2-1.

  • Page 4: Main Board

    2-2. MAIN BOARD 3 Screw (M1.4) 5 Main board 2 Remove the four solders. 4 Two claws 1 Flexible board (CN301) 2-3. CASSETTE HOLDER 2 Insert a precision screwdriver (1.4 mm flat-blade) vertically in to portion A to release the hinge plate.

  • Page 5: Mechanism Deck (Mf-Wmfx251-114)

    2-4. MECHANISM DECK (MF-WMFX251-114) 2 Remove the mechanism deck (MF-WMFX251-114) in the direction of the arrow A . 1 Insert the precision screwdriver (1.4 mm flat-blade) in the slit and relese two claws. 2-5. BELT, MOTOR (CAPSTAN/REEL) (M901), PLAYBACK HEAD (HP901) 4 Screws (M1.4) 3 Motor (capstan/reel) (M901)

  • Page 6: Mechanical Adjustments

    SECTION 4 SECTION 3 ELECTRICAL ADJUSTMENTS MECHANICAL ADJUSTMENTS Precaution Precaution 1. Clean the following parts with a denatured-alcoholmoistened • Supplied voltage: 2.5 V swab: • Switch and control position playback head pinch roller TAPE switch: NORM capstan rubber belt RADIO switch: DX VOLUME CONTROL: maximum 2.

  • Page 7: Tuner Section

    TUNER SECTION 0 dB=1µ V AM SECTION Setting: FM SECTION RADIO ON/OFF switch: ON BAND switch: AM Setting: RADIO ON/OFF switch: ON AM Tuning Voltage Adjustment BAND switch: FM digital voltmeter FM Tuning Voltage Adjustment digital (VT) voltmeter (GND) (VT) (GND) AM TUNING VOLTAGE ADJUSTMENT Adjustment value: 1.0V...
  • Page 8 Adjustment Location: [MAIN BOARD] – Component Side – L4 : AM Tuning Voltage Adjustment RV601 : Tape Speed Adjustment L2 : FM Tracking Adjustment IC401 IC301 L1 : AM Tracking Adjustment T1 : AM IF Adjustment L3 : FM Tuning Voltage Adjustment CT1 : AM Tracking Adjustment [MAIN BOARD] –...

  • Page 9: Diagrams

    WM-PSY02 SECTION 5 DIAGRAMS 5-2. BLOCK DIAGRAM 5-1. EXPLANATION OF IC TERMINALS MAIN BOARD IC401 µPD17015GS-545-GJG-E1 (SYSTEM CONTROLLER, LCD DRIVER) Pin No. Pin name Description KEYIN3 Key return signal input terminal KEYOUT1 KEYOUT2 Key strobe signal output terminal KEYOUT3 MUTE Muting on/off control signal output to the LA4582CM (IC301) “L”: muting on...

  • Page 11: Schematic Diagram

    5-4. SCHEMATIC DIAGRAM Refer to page 21 for IC Block Diagrams. WM-PSY02 Waveforms Q307 (COLLECTOR) IC401 !£ (XIN) 500 mV/DIV, 100 ns/DIV 500 mV/DIV, 5µs/DIV 1.5 Vp-p 2 Vp-p 75.2 kHz 3.38 MHz T301 (SECONDARY) Q307 (BASE) 5 V/DIV, 200 ns/DIV 100 mV/DIV, 100 ns/DIV 0.3 Vp-p...

  • Page 12: Mechanism Deck Section

    SECTION 6 EXPLODED VIEWS NOTE : IC Block Diagrams 6-2. MAIN SECTION-2 6-3. MECHANISM DECK SECTION • -XX, -X mean standardized parts, so they • The mechanical parts with no reference (MF-WMFX251-114) may have some difference from the original number in the exploded views are not IC1 TA2111F-(EL) one.

  • Page 13: Electrical Parts List

    SECTION 7 MAIN ELECTRICAL PARTS LIST NOTE : • Due to standardization, replacements in the • SEMICONDUCTORS When indicating parts by reference num- In each case, u : µ , for example : parts list may be different from the parts ber, please include the board.
  • Page 14 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C409 1-163-095-00 CERAMIC CHIP 12PF 1-216-295-00 METAL CHIP 1/10W 1-216-864-11 METAL CHIP 1/16W C410 1-163-101-00 CERAMIC CHIP 22PF C411 1-164-156-11 CERAMIC CHIP 0.1uF 1-216-296-91 METAL CHIP 1/8W C412 1-162-970-11 CERAMIC CHIP 0.01uF...
  • Page 15 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 1-216-821-11 METAL CHIP 1/16W 1-216-815-11 METAL CHIP 1/16W R606 1-216-845-11 METAL CHIP 100K 1/16W 1-216-835-11 METAL CHIP 1/16W R607 1-216-817-11 METAL CHIP 1/16W R608 1-216-833-91 RES,CHIP 1/16W 1-216-835-11 METAL CHIP 1/16W 1-216-797-11 METAL CHIP...
  • Page 16 WM-PSY02 Sony Corporation 99D027022-1 Printed in Singapore © 1999.4 Personal A&V Products Company 9-926-987-11 Published by Quality Engineering Dept. – 28 – (Shinagawa)

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