Sony wm ex 652 service manual

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\lllM-EX650_/EX652/EX_654

SERVICE MANUAL

AEP Model

WM-EX650/EX652/EX654

UK Model
E Model

WM-EX652/EX654

Photo: WM-EX652

Dolby noise reduction manufactured under license
from Dolby Laboratories Licensing Corporation.
DOLBV and the double-D symbol m are trademarks
of Dolby Laboratories Licensing Corporation,

Model Name Using Similar Mechanism NEW
MT-WMEX550425

Tape Transport Mechanism Type

SPECIFICATIONS

Tape section

Frequency response (Dolby NR off)

Playback: 20-18,000Hz
Output

Headphones ({VIREMOTE lack)

Load impedance 8600 ohms
Power output

5 mW + 5 mW (16 ohms)

General

Power requirements
1.5 V
Rechargeable ballery
One R6 (size AA) battery
Dimensions (w/h/d)
Approx 108 9 x 79 5 x 219 mm
(All/xx 3% x Wu inches),
incl projecting parts and controls
Mass
Approx 140 g
EX654: Approx. 235 g (3.302)
incl. rechargeable battery,
headphones wnh remote control
and cassette
EX652: Approx, 225 g (8,002,)
mtl. rechargeable ballcry.
headphones wilh remote control
and cassette
exam; Approx. 230 g (8.201 )
incl. rechargeable battery,
headphones and cassette

MICFIOFILM

Supplied accessories

- Battery case (1)

~ Stereo headphones Wlth remote
Control (1) (EXSSé/EXhSZ only)

- Stereo headphones (l) iEXéSU
only)

I Clip (1) (EXGSrl/EXESZ only)

0 Ballery charger (1)

- AC plug adaplor (l) (uxchxdilig
European, Arabian and Korean
models)

0 Rechargeable battery (NCGWM,
1.2 V, 600 niAli, vaCd) (1)

- Carrying pouch (l)

o Rechargeable ballery Carr) mg
case (1)

Design and specifications are subject
to change Without notice,

House Current
(see Fi9- I-©)

Remove the rechargeable battery if
inserted and attach the battery
case Connect lhe AC power
adaptor AC-EISHG (not supplied)
to the DC IN l.5V jack and to the
mains. Do not use any other AC
power adaptor

Polarity of
the plug

CASSETTE PLAYER
S ONY;

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TABLE OF CONTENTS

1. SERVICING NOTE .................................................. 3
3. DISASSEMBLY ........................................................ 7
4. MECHANICAL ADJUSTMENTS 12
5. ELECTRICAL ADJUSTMENTS ......................... 12

6. DIAGRAMS
6-1. Primed Wiring Boards ..
6-2. Schematic Diagram ,4

l3
l7

6-3. IC Pin Function Descnptlon 22
7. EXPLODED VIEWS 24
8. ELECTRICAL PARTS LIST ................................ 27

SAFETY-RELATED COMPONENT WARNINGI!

COMPONENTS IDENTIFIED BY MARK A OR DOTTED LINE
WITH MARK A 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.

Flexible Circuit Board Repairing

0 Keep the temperature of the soldering iron around 270 ' C dur-
ing repairing,

0 Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).

0 Be careful not to apply force on the conductor when soldering
or unsoldering

Notes on chip component replacement

0 Never reuse a disconnected chip component.

0 Notice that the minus side of a tantalum capacitor may be dam-
aged by heat