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).
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. 2.Remove the window(LCD).
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. 3-1.
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. 2,3 Insert the hinge of the “Cassette holder ”.
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 capstan rubber belt VOLUME control (RV301) : maximum...
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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 <...
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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...
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.
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.
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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.
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 •...
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.
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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) X701 1-781-592-11 VIBRATOR, CRYSTAL(75kHz) (5E,6E,MX) R501...
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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 2001.03...