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Sony WM-EX2000 Service Manual

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SERVICE MANUAL
Ver 1.2 2003. 11
Manufactured under license from Dolby Laboratories
Licensing Corporation.
"DOLBY" and the double-D symbol ; are trademarks
of Dolby Laboratories Licensing Corporation.
Frequency response
(Dolby NR off)
Output
Power requirements
Dimensions (w/h/d)
Mass
9-873-022-13
Sony Corporation
2003K16-1
Personal Audio Company
© 2003.11
Published by Sony Engineering Corporation
WM-EX2000
SPECIFICATIONS
Playback: 30 – 18,000 Hz
Headphones (i jack)
Load impedance 8 – 300 Ω
1.2 V
One rechargeable battery
Approx. 76.3 × 108.4 × 17.5 mm
× 4
×
(3
1
/
3
/
23
/
inches)
8
8
32
Approx. 145 g (5.2 oz.)
Model Name Using Similar Mechanism
Tape Transport Mechanism Type
Supplied accessories
Stereo headphones or earphones with
remote control (1)
Battery charging stand (1)
AC power adaptor (1)
Rechargeable battery (NH-14WM (A),
1.2V, 1 350 mAh (MIN), Ni-MH) (1)
Rechargeable battery carrying case (1)
Carrying pouch (1)
Design and specifications are subject to change without notice
CASSETTE PLAYER
US Model
AEP Model
Chinese Model
E Model
Tourist Model
NEW
MT-WMEX2000-162

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  • Page 1 Rechargeable battery carrying case (1) × 4 × inches) Carrying pouch (1) Mass Approx. 145 g (5.2 oz.) Design and specifications are subject to change without notice CASSETTE PLAYER 9-873-022-13 Sony Corporation 2003K16-1 Personal Audio Company © 2003.11 Published by Sony Engineering Corporation...
  • Page 2 COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.

  • Page 3: Service Note

    SECTION 2 SERVICE NOTE [Service Mode] The service mode enables to operate the mechanism of WM-EX2000 2. PRE-SET status while the MAIN board is opened. The set must be in this state before the PLAY, FF and REW modes Rotation of the idler gear (A) (S side) is detected using the photo- can be entered.
  • Page 4 [ Slider (NR) ] slider (NR) F side flywheel F side center R side [ Rotational system ] 2. Rotational System of FF Mode 1. Rotational System of PLAY Mode idler gear (A) (S side) gear (reel) (T side) idler gear (A) (T side) gear (reel) (T side) gear (reel) (S side) motor pulley...

  • Page 5: Lid Block Assy, Cassette

    SECTION 3 DISASSEMBLY • The equipment can be removed using the following procedure. Lid Block Assy, Ornament (OPEN) "Switch, Leaf (S704)" Case Block Assy Belt (F0), Motor (M601) Cassette Block Assy Main Board Holder (FA) Assy Pinch Lever (NF)/(RF) Assy Head, Magnetic (HP701) Note : Follow the disassembly procedure in the numerical order given.
  • Page 6 3-3. ORNAMENT (OPEN) BLOCK ASSY Ornament (open) block assy Mechanism deck block 3-4. “SWITCH, LEAF (S704)”, MAIN BOARD 4 Unsolder the 4 places. 1 Screw 0 Claw 5 Screw (M1.4) 6 Switch leaf (S704) 7 Unsolder the plunger. 3 Screw 8 Unsolder the flexible board.

  • Page 7: Belt (F0), Motor (M601)

    Ver 1.2 2003. 11 3-5. BELT (F0), MOTOR (M601) 1 Belt (F0) 2 Two screws (M1.4) 4 Motor (M601) 3 Retainer (F1), motor Belt (F0) 3-6. HOLDER (FA) ASSY 8 Screw (M1.4) 0 Bracket (CASSETTE) assy qa Remove soldering from Head flexible board. qs Head flexible board 6 Shaft...

  • Page 8: Head, Magnetic (Hp701)

    3-7. PINCH LEVER (NF)/(RF) ASSY Claw 2 Remove the pinch lever (NF) assy in the direction of the arrow. Note: Be careful of the claw Claw 1 Remove the pinch lever (RF) assy in the direction of the arrow. Note: Be careful of the claw 3-8.

  • Page 9: Mechanical Adjustment

    SECTION 4 SECTION 5 MECHANICAL ADJUSTMENTS ELECTRICAL ADJUSTMENT PRECAUTION PRECAUTION Clean the following parts with a denatured-alcohol-moistened • Supplied voltage : 1.3 V swab : • Switch and control position playback head pinch roller VOL switch : NORM capstan rubber belt •...

  • Page 10: Block Diagram

    WM-EX2000 SECTION 6 DIAGRAMS 6-1. BLOCK DIAGRAM HP701 CUE/REV (PLAYBACK) AUDIO AMP CONTROL DOLBY AMP SURROUND AMP AUDIO AMP IC301 (1/2) Q317 FWD L IC303 IC302 IC301 (2/2) L CH PRE OUT L PW IN L J301 PW OUT L –...

  • Page 11: Printed Wiring Board

    WM-EX2000 6-2. PRINTED WIRING BOARD MAIN S704-1 S704-2 BOARD TAPE IN SWITCH SWITCH (SIDE B) J301 IC702 DRY BATTERY PM701 MAIN BOARD SIZE "AA" (SIDE A) (PLUNGER) (IEC DESIGNATION R6) RECHAGEABLE BATTERY 1PC, 1.5V NH-14WM (1.2V 1400mA) BATTERY CASE bB / x...

  • Page 12: Ic Block Diagrams

    WM-EX2000 6-3. SCHEMATIC DIAGRAM MAIN (1/2) SECTION • Refer to 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.

  • Page 13: Ic Pin Function Description

    WM-EX2000 6-4. SCHEMATIC DIAGRAM MAIN (2/2) SECTION • Refer to page 22 for IC Block Diagrams. • Refer to page 23 for IC Pin Function Description. • Waveform IC601 456 Q603 80qs 150 Hz 0.5V/div 150 Hz 0.5V/div 5µsec/div 2µsec/div...
  • Page 14 6-5. IC BLOCK DIAGRAMS IC301 TA2123AF 36 35 32 31 28 27 26 – CAMP SW RF IN MT TC PW GND – BEEP PW OUT R BEEP AMS OUT PW OUT C NT SW PW OUT L – PW SW BST SW TOMP F/R SW...
  • Page 15 IC601 LB1994M M CENTER BUFFER COMPARATOR BUFFER P-SIG 13 PW COMPARATOR D/DT PULSE 12 CI 11 Vref POWER W OUT CURRENT V OUT U OUT SOFT CLIP 10 P SIG PW•SW CTRL BLOCK DECODER 4 5 6 IC703 MM1305BWBE OUT 1 OUT 2 OUT 3 RIPPLE...
  • Page 16 6-6. IC PIN FUNCTION DESCRIPTION • IC705 ML63514-024TBZ060 (SYSTEM CONTROL) Pin No. Pin Name Description AUDIO ATT Audio ATT circuit control output. L=OFF. H=ON (during CUE/REVIEW) FWD SW MD MODE SW (FWD). L=ON CENTER SW MD MODE SW (CENTER). L=ON RVS SW MD MODE SW (RVS).

  • Page 17: Cabinet Block

    Ver 1.2 2003. 11 SECTION 7 EXPLODED VIEWS NOTE: • -XX, -X mean standardized parts, so they may • Hardware (# mark) list and accessories and • Abbreviation have some differences from the original one. packing materials are given in the last of this Chinese model •...

  • Page 18: Mechanism Deck Block

    7-2. MECHANISM DECK BLOCK PM701 M601 HP701 Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks X-3377-589-1 HOLDER (FA) ASSY 3-029-765-01 SCREW (M1.4), TOOTHED LOCK X-3377-995-1 PINCH LEVER (RF) ASSY X-3379-421-1 FLYWHEEL (R) ASSY X-3377-994-1 PINCH LEVER (NF) ASSY 3-029-883-01 RETAINER (F1), MOTOR 3-029-275-01 WASHER (STOPPER N) 3-029-273-01 GEAR(FR)

  • Page 19: Electrical Parts List

    SECTION 8 MAIN ELECTRICAL PARTS LIST NOTE: • Due to standardization, replacements in the • RESISTORS • SEMICONDUCTORS parts list may be different from the parts All resistors are in ohms. In each case, u: µ, for example: specified in the diagrams or the components METAL: metal-film resistor uA...: µA...
  • Page 20 MAIN Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks < IC > R106 1-218-955-11 RES-CHIP 1.5K 1/16W R107 1-218-955-11 RES-CHIP 1.5K 1/16W IC301 8-759-579-12 IC TA2123AF(EL) R108 1-218-969-11 RES-CHIP 1/16W IC302 8-759-597-24 IC NJM2190V(TE2) R109 1-244-161-11 RES-CHIP 1/16W IC303 8-759-488-80 IC NJM2185AV-TE2...
  • Page 21 WM-EX2000 Ver 1.1 2001. 01 MAIN Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks R611 1-218-983-11 RES-CHIP 330K 1/16W ACCESSORIES & PACKING MATERIALS R612 1-218-989-11 RES-CHIP 1/16W ******************************* R613 1-218-989-11 RES-CHIP 1/16W R614 1-218-977-11 RES-CHIP 100K...
  • Page 22 WM-EX2000 MEMO...
  • Page 23 WM-EX2000 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 2000.10...

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