Sony WM-FX277 Service Manual
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Sony WM-FX277 Service Manual

Sony WM-FX277 Service Manual

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SERVICE MANUAL
Ver 1.0 2001. 03
The WM-FX241(E Model) is approximately the same as the WM-FX277(5E Model).
Consequently, only difference between WM-FX241(E Model) and WM-FX277
(5E Model) are listed.
For other information, please refer to the WM-FX277 service manual (9-927-695-
31) previously issued.
DIFFERENCE PARTS LIST
z
EXPLODED VIEWS (Service Manual See page 17)
WM-FX277 (5E Model)
Ref. No.
Part No.
Description
1
3-227-307-11
CABINET(FRONT)
2
3-227-308-11
WINDOW(LCD)
14
3-227-306-11
CABINET(CENTER)
16
3-227-313-11
LID, BATTERY CASE
ACCESSORIES & PACKING MATERIALS
z
Ref. No.
Part No.
Description
3-225-744-11
MANUAL, INSTRUCTION (ENGLISH, SPANISH,
3-229-494-01
CASE, CARRYING
8-953-130-90
HEADPHONE MDR-E805LP
Sony Corporation
9-873-104-11
Audio Entertainment Group
2001C0200-1
General Engineering Dept.
© 2001.3
WM-FX241
Remark
Part No.
3-227-307-01
3-227-308-01
3-227-306-01
3-227-313-01
Remark
PORTUGUESE)
RADIO CASSETTE PLAYER
E Model
WM-FX241 (E Model)
Description
CABINET(FRONT)
WINDOW(LCD)
CABINET(CENTER)
LID, BATTERY CASE
Remark

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  • Page 1 SERVICE MANUAL E Model Ver 1.0 2001. 03 The WM-FX241(E Model) is approximately the same as the WM-FX277(5E Model). Consequently, only difference between WM-FX241(E Model) and WM-FX277 (5E Model) are listed. For other information, please refer to the WM-FX277 service manual (9-927-695- 31) previously issued.
  • Page 2 WM-FX241 REVISION HISTORY Clicking the version allows 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 2001.03...

  • Page 3: Specifications

    WM-FX277 SERVICE MANUAL E Model Chinese Model Ver 1.0 2001.03 Model Name Using Similar Mechanism MD Mechanism Type MF-WMFX241-114 SPECIFICATIONS RADIO CASSETTE PLAYER Sony Corporation 9-927-695-31 2001C0200-1 Audio Entertainment Group © 2001.3 General Engineering Dept.

  • Page 4: Table Of Contents

    WM-FX277 TABLE OF CONTENTS Specifications ................1 Flexible Circuit Board Repairing • Keep the temperature of the soldering iron around 270°C during 1. SERVICING NOTE repairing............3 • Do not touch the soldering iron on the same conductor of the circuit board (within 3 times).

  • Page 5: Servicing Note

    WM-FX277 SECTION 1 SERVICING NOTE In case of adjusting Tape Speed, you can easily to adjust RV601 by removing 7 claws on Window (LCD) and itself as shown in the figure. 1.Insert the precision screwdriver (Cover a point by cloth) in to the slit at claw.

  • Page 6: Disassembly

    WM-FX277 SECTION 3 DISASSEMBLY • The equipment can be removed using the following procedure. Cassette holder ASSY Main board Mechanism deck Belt, Capstan/reel motor (M601), Magnetic head (Playback) (HP601) Cabinet (Front) Cassette holder Note : Follow the disassembly procedure in the numerical order given.

  • Page 7: Mechanism Deck

    WM-FX277 3-3. MECHANISM DECK Mechanism deck 1 Claws Cassette holder ASSY 3-4. BELT, CAPSTAN/REEL MOTOR (M601), MAGNETIC HEAD (PLAYBACK)(HP601) 3 Screws (M1.4) 5 Screws (M1.4) 4 Capstan/reel motor Mechanism deck (M601) 6 magnetic head (PLAYBACK) (HP601) 1 Claw 2 Belt...

  • Page 8: Cassette Holder

    WM-FX277 3-5. CASSETTE HOLDER 2 Move the hinge away from projection Hinge Projection Projection 3 Move the hinge away from projection Hinge Projection Cabinet (center) Projection Hinge Hinge 4 Spring (torsion) Cassette holder CAUTIONS DURING ASSEMBLY Insert the spring (torsion) to the L shape slot as shown in the figure.

  • Page 9: Adjustments

    WM-FX277 SECTION 4 ADJUSTMENTS 4-1. MECHANICAL ADJUSTMENTS 4-2. ELECTRICAL ADJUSTMENTS PRECAUTION PRECAUTION 1. Clean the following parts with a denatured-alcohol-moistened • Supplied voltage : 2.5V. swab : • Switch and control position playback head pinch roller MEGA BASS (S709) : OFF...
  • Page 10 WM-FX277 • Repeat the procedures in each adjustment several times, and the 0 dB = 1µV TUNER SECTION frequency coverage and tracking adjustments should be finally AM section done by the trimmer capacitors. no mark : 10kHz step BAND : AM <...
  • Page 11 WM-FX277 Adjustment Location : L3 : FM Frequency Coverage Adjustment [MAIN BOARD] (SIDE A) L2 : FM tracking Adjustment L1 : AM Tracking Adjustment T1 : AM IF Adjustment L4 : AM Frequency Coverage Adjustment CT1 : AM Tracking Adjustment...

  • Page 12: Diagrams

    WM-FX277 SECTION 5 DIAGRAMS 5-1. EXPLANATION OF IC TERMINALS IC702 LC72348W-9A36 SYSTEM CONTROL Pin No. Pin name Descliption XOUT Crystal oscillator output (75kHz). TEST2 – Not used (Ground). Key input. Key input. Key input. Key input. Key output. Key output.

  • Page 13: Block Diagram

    WM-FX277 5-2. BLOCK DIAGRAMS • Abbreviation : Mexican : Chinese : Indication of country of origin (ST/FM MONO) : No Indication of country of origin 5E, 6E : Indication of country of origin (DX/LOCAL) : Taiwan • Signal path.

  • Page 14: Printed Wiring Boards - Main Section (Side A)

    WM-FX277 5-3. PRINTED WIRING BOARDS – MAIN SECTION (SIDE A) – Semiconductor Location Ref. No. Location MAIN BOARD (SIDE A) IC301 IC701 IC702 Q301 Q501 Q502 Q701 X701 1-680-658- (12) Note: • X : parts extracted from the component side.

  • Page 15: Printed Wiring Boards - Main Section (Side B)

    WM-FX277 5-4. PRINTED WIRING BOARDS – MAIN SECTION (SIDE B) – DRY BATTERY SIZE "AA" Semiconductor (IEC DESIGNATION R6) 2PCS, 3V Location Ref. No. Location MAIN BOARD (SIDE B) D401 D703 B-10 Q401 J301 S702 TUNING+ LCD701 LIQUID CRYSTAL DISPLAY PANEL S705 TUNING–...

  • Page 16: Schematic Diagram

    WM-FX277 5-5. SCHEMATIC DIAGRAM Refer to page 15 for Notes. Refer to page 15 for Waveforms. Refer to page 16 for IC Block Diagrams.
  • Page 17 WM-FX277 Note on Schematic Diagram: MAIN SECTION Waveforms • All capacitors are in µF unless otherwise noted. pF: µµF 50 WV or less are not indicated except for electrolytics and tantalums. • All resistors are in Ω and W or less unless otherwise specified.
  • Page 18 WM-FX277 • IC BLOCK DIAGRAMS IC1 TA2111F-(EL) Φ Φ DECODER RF AMP DIVIDER AF BUFFER ST/MONO MUTE FM/AM LEVEL AM IF FM IF RF AMP IC301 LB8115W-NA-TLM 48 47 46 45 44 43 FREQ PRE DRIVER CARC. FWD/ OPERATION LOGIC...

  • Page 19: Exploded Views

    WM-FX277 SECTION 6 EXPLODED VIEWS NOTE : • Hardware (# mark) list and accessories and packing • -XX, -X mean standardized parts, so they materials are given in the last of this parts list. may have some difference from the original •...

  • Page 20: Mechanism Deck Section (Mf-Wmfx241-114)

    WM-FX277 6-2. MECHANISM DECK SECTION (MF-WMFX241-114) supplied supplied not supplied supplied supplied supplied supplied supplied M601 HP601 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 3-920-990-01 SPRING (UD), COMPRESSION X-3369-749-1 PINCH LEVER (N) ASSY 3-921-335-01 WASHER, LEVER...

  • Page 21: Electrical Parts List

    WM-FX277 SECTION 7 MAIN ELECTRICAL PARTS LIST NOTE : • Due to standardization, replacements in the • Items marked “ * ”are not stocked since they When indicating parts by reference num- parts list may be different from the parts are seldom required for routine service.
  • Page 22 WM-FX277 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C607 1-125-838-11 CERAMIC CHIP 2.2uF 6.3V 1-414-760-21 FERRITE C701 1-164-361-11 CERAMIC CHIP 0.047uF L401 1-414-760-21 FERRITE C702 1-107-826-11 CERAMIC CHIP 0.1uF L702 1-412-995-21 INDUCTOR 22uH C703...
  • Page 23 WM-FX277 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R401 1-216-845-11 METAL CHIP 100K 1/16W <VIBRATOR> R402 1-216-864-91 SHORT R403 1-216-821-11 METAL CHIP 1/16W 1-795-233-11 FILTER, CERAMIC(10.7MHz) R404 1-216-835-11 METAL CHIP 1/16W X701 1-760-130-11 VIBRATOR, CRYSTAL(75kHz) (E,9E,TW,CH)
  • Page 24 WM-FX277 REVISION HISTORY Clicking the version allows 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...

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