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WM-EX570 SERVICE MANUAL AEP Model E Model Ver 1.0 1999. 02 Tourist Model Photo: Black model Dolby noise reduction manufactured under license Model Name Using Similar Mechanism 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.
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.
SECTION 1 SERVICING NOTES This set detects the rotation of GEAR (S) 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.
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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 assy (M) side R senter flywheel (R) assy...
SECTION 3 DISASSEMBLY • This set can be disassembled in the order shown below. Case Assy Lid Assy, Ornament Assy Belt Cassette Main Board, Holder Note for Installation Head, Magnetic Motor (Capstan/Reel) (M901) Note: Follow the disassembly procedure in the numerical order given. LID ASSY, CASSETTE 2 screw 1 Open the cassette lid assy...
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CASE ASSY 3 case assy 1 two screws (M1.4 × 2.2) 2 two claws 1 two screws (M1.4 × 2.2) ORNAMENT ASSY 2 Push to the direction of the arrow A , 4 Remove the reel ornament to direction of the arrow B . remove the claw of knob (OPEN).
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BELT 1 belt HOLDER 2 screw 4 holder 3 two claws 1 Remove two solders of battery terminal. – 8 –...
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3 three screws MAIN BOARD 1 Remove four solders of motor. 1 Remove two 2 flexible board solders of plunger solenoid. (CN301) 3 screw (M1.4 × 1.6) 4 MAIN board NOTE FOR INSTALLATION • MAIN BOARD On installation MAIN board adjust the S702 and lever (SW) S702 lever (SW)
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MOTOR (CAPSTAN/REEL) (M901) 1 two screws (M1.4) 2 Remove the motor (M901) to direction of the arrow. HEAD, MAGNETIC 1 two pinch levers 2 screw 5 two screws (M1.4 × 1.6) (M1.4 × 7.2) 4 flexible board (CN301) 3 bracket assy 6 head, magnetic (HP901) –...
WM-EX570 6-3. SCHEMATIC DIAGRAM • See page 20 for Waveforms, and See page 21 for IC Block Diagrams. Note on Schematic Diagram: • All capacitors are in µF unless otherwise noted. pF: µµF 50 WV or less are not indicated except for electrolytics and tantalums.
6-4. IC PIN FUNCTION DESCRIPTION • MAIN BOARD IC701 MSM6576-83GS-K (SYSTEM CONTROLLER) Pin No. Pin Name Description 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”...
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Pin No. Pin Name Description — 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...
SECTION 7 EXPLODED VIEWS NOTE: • -XX and -X mean standardized parts, so they • Items marked “*” are not stocked since they • Abbreviation may have some difference from the original are seldom required for routine service. Some : East European model one.
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(2) MAIN BOARD SECTION not supplied HP901 S901 not supplied J801 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 3-009-669-01 TERMINAL (+), BATTERY X-3374-438-1 BRACKET ASSY (EXCEPT JE) 3-375-114-11 SCREW 3-009-667-01 SPRING, TENTION 3-009-670-01 TERMINAL (-), BATTERY 3-011-277-01 COVER (B) (Y), MD 3-009-675-01 HOLDER 3-019-716-01 SCREW (M1.4), P LOCK ACE (EXCEPT JE)
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(3) MECHANISM DECK SECTION (MT-WMEX550-125) M901 PM901 not supplied not supplied 104 103 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark X-3374-094-1 CHASSIS (S) ASSY (Y) (JE) 3-932-724-21 WASHER X-3374-440-1 CHASSIS ASSY (J2) (EXCEPT JE) 3-386-694-21 WASHER 3-007-457-01 SPRING (TEN), TENSION X-3372-852-1 FLYWHEEL (N) ASSY (JE) 3-010-954-01 SPRING (BT), COMPRESSION...
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 are seldom required for routine service. parts list may be different from the parts speci- ! are critical for safety.