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SERVICE MANUAL
Dolby noise reduction manufactured under license
from Dolby Laboratories Licensing Corporation.
"DOLBY" and the double-D symbol a are trade-
marks of Dolby Laboratories Licensing Corporation.
MICROFILM
WM-EX660/EX662
Model Name Using Similar Mechanism WM-EX650/EX652/EX654
Tape Transport Mechanism Type
SPECIFICATIONS
AEP Model
UK Model
WM-EX660/EX662
E Model
WM-EX662
MT-WMEX550-125
CASSETTE PLAYER
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Table of Contents
Related Manuals for Sony WM-EX660
Summary of Contents for Sony WM-EX660
- Page 1 WM-EX660/EX662 SERVICE MANUAL AEP Model UK Model WM-EX660/EX662 E Model WM-EX662 Dolby noise reduction manufactured under license Model Name Using Similar Mechanism WM-EX650/EX652/EX654 from Dolby Laboratories Licensing Corporation. Tape Transport Mechanism Type MT-WMEX550-125 “DOLBY” and the double-D symbol a are trade- marks of Dolby Laboratories Licensing Corporation.
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Page 2: Table Of Contents
OPERATION. REPLACE THESE COMPONENTS WITH • Never reuse a disconnected chip component. SONY PARTS WHOSE PART NUMBERS APPEAR AS • Notice that the minus side of a tantalum capacitor may be dam- SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB- aged by heat. -
Page 3: Servicing Notes
SECTION 1 SERVICING NOTES This set detects the rotation of GEAR (PH) using the PH701 (photo 1. Setting reflector). The PH701 is mounted on the MAIN board, and there- 1) Refer to “3. DISASSEMBLY”, and remove the cabinet and fore the GEAR cannot be detected with the MAIN board removed. open the MAIN board. - Page 4 Lever (SW) Rotation system Rotation system during PLAY. gear (NR) (REV: right side/ gear (REEL) FWD: left side) lever (SW) gear (REEL) (S side) (T side) gear (TB) gear (S) motor pulley gear (TA) side F gear (Y) clutch ass’y (M) side R senter flywheel (R) ass’y...
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Page 5: General
SECTION 2 This section is extracted from instruction manual. GENERAL – 5 –... - Page 6 – 6 –...
- Page 7 – 7 –...
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Page 8: Disassembly
SECTION 3 DISASSEMBLY • This set can be disassembled in the order shown below. CASSETTE LID ASS’Y CASE (N) ASS’Y REEL ORNAMENT MAIN BOARD NOTE FOR INSTALLATON MOTOR (M901) BELT MAGNETIC HEAD (HP901) Note: Follow the disassembly procedure in the numerical order given. CASSETTE LID ASS’Y 3 Remove the cassette lid ass’y to direction of the arrow A . - Page 9 CASE (N) ASS’Y 3 case (N) ass’y 1 serrat IB locks 1 two serrat IB locks 2 two claws 1 two serrat IB locks REEL ORNAMENT 2 Push to the direction of the arrow A , 4 Remove the reel ornament to remove the claw of knob (OPEN).
- Page 10 MAIN BOARD 5 screw 6 serrat IB lock 1 Remove five solders of motor (M901) and battery terminal board ass’y. 2 screw 4 flexible board (CN301) 7 screw (IB lock) 3 battery terminal 8 main board board ass’y 1 Remove two solders of plunger solenoid.
- Page 11 BELT 2 battery terminal board 3 belt 1 Remove the solder of battery terminal board. MOTOR (M901) 1 two screws (IB lock) 2 Remove the motor (M901) to direction of the arrow. – 11 –...
- Page 12 MAGNETIC HEAD (HP901) 1 pinch lever (N) ass’y 1 pinch lever (R) ass’y 5 two screws 2 screw (IB lock) (M1.4 × 7.2) 4 flexible board (CN301) 3 bracket ass’y 6 magnetic head (HP901) – 12 –...
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Page 13: Mechanical Adjustments
SECTION 4 SECTION 5 ELECTRICAL ADJUSTMENTS MECHANICAL ADJUSTMENTS PRECAUTION PRECAUTION 1. Clean the following parts with a denatured-alcohol-moistened 1. Specified voltage : 1.3 V (DC) swab: 2. Setting playback head pinch roller BL SKIP : OFF rubber belts capstan SOUND MB/GRV : OFF 2. - Page 17 • Waveforms 1 IC701 #• (PHOTO IN) 5 Q504 Base 500 mV/DIV, 50 ms/DIV 200 mV/DIV, 500 µs/DIV 1.4 Vp-p 0.6 Vp-p 980 µ s 100 ms 6 Q504 Collector 2 IC701 !∞ (XTB) 200 mV/DIV, 500 µs/DIV 200 mV/DIV, 10 µs/DIV 1.3 Vp-p 1 Vp-p 32.768 kHz...
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Page 18: Diagrams
• IC Block Diagrams IC301 TA2072AF IC601 MM1279XVBE – 24 –... -
Page 19: 6-4. Ic Pin Function Description
6-4. IC PIN FUNCTION DESCRIPTION • MAIN BOARD IC701 MSM6576-83GS-K (SYSTEM CONTROLLER) Pin No. Pin Name Function The output terminal for the control signal to start the motor M.CTL Turn the motor when set to “H” The output terminal for selecting the rotating direction of the motor M.DIR Turn the motor counterclockwise when set to “H”, and clockwise when set to “L”... - Page 20 Pin No. Pin Name Function — Power supply terminal (+1.5V) BOOST CTL Bass-boost on/off control signal output to the TA2072AF (IC301) MB/GRV CTL MEGA BASS/GROOVE selection signal output to the TA2072AF (IC301) LOAD CTL Load control signal output terminal AVLS (Automatic Volume Limiter System) on/off control signal output to the TA2072AF AVLS CTL (IC301) AMP CTL...
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Page 21: Exploded Views
SECTION 7 EXPLODED VIEWS NOTE: • -XX and -X mean standardized parts, so they • Items marked “*” are not stocked since they are seldom required for routine service. Some may have some difference from the original one. delay should be anticipated when ordering •... - Page 22 (2) MAIN BOARD SECTION not supplied HP901 S901 not supplied Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark X-3373-190-1 TERMINAL BOARD ASSY, BATTERY 3-012-423-01 COVER (GX), MD (EX662: E, 9E, 3-937-993-41 LID, BATTERY CASE (BLACK) Saudi Arabia, Korean) (EX660: AEP, French/EX662) 3-012-423-11 COVER (GX), MD 3-937-993-51 LID, BATTERY CASE (BLUE)
- Page 23 (3) MECHANISM DECK SECTION (MT-WMEX550-125) M901 PM901 not supplied supplied 104 103 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark X-3374-440-1 CHASSIS ASSY (J2) X-3372-848-1 CLUTCH ASSY (M) 3-007-457-01 SPRING (TEN), TENSION 3-932-724-21 WASHER 3-010-954-01 SPRING (BT), COMPRESSION 3-386-694-11 WASHER 3-010-274-02 TABLE, REEL X-3374-751-1 FLYWHEEL (N) ASSY...
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Page 24: Electrical Parts List
SECTION 8 MAIN ELECTRICAL PARTS LIST NOTE: • Due to standardization, replacements in the • Items marked “*” are not stocked since they The components identified by mark ! or dotted line with mark parts list may be different from the parts speci- are seldom required for routine service. - Page 25 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark < CONNECTOR > Q705 8-729-402-42 TRANSISTOR UN5213 Q706 8-729-403-17 TRANSISTOR XN1215 CN301 1-766-336-21 CONNECTOR, FFC/FPC 6P Q707 8-729-403-17 TRANSISTOR XN1215 Q708 8-729-420-24 TRANSISTOR 2SB1218A-QRS < DIODE > Q709 8-729-030-53 TRANSISTOR MSD1819A-RT1 D101...
- Page 26 WM-EX660/EX662 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R706 1-216-849-11 METAL CHIP 220K 1/16W ACCESSORIES & PACKING MATERIALS R707 1-218-870-11 RES, CHIP 9.1K (1608) ******************************** R708 1-216-851-11 METAL CHIP 330K 1/16W 1-475-181-11 REMOTE CONTROL UNIT (RM-WME654)