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SAFETY-RELATED COMPONENT WARNING !!
COMPONENTS IDENTIFIED BY MARK ! OR DOTTED
LINE WITH MARK ! 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.
TABLE OF CONTENTS
Section Title Page
SECTION 1. GENERAL .......................................... 3
SECTION 2. SERVICE NOTE ................................. 4
SECTION 3. DISASSEMBLY
3-1. Bracket assembly and Cassette Holder assembly .............. 6
3-2. Audio Board ....................................................................... 6
3-3. Tuner Board ....................................................................... 7
SECTION 4. ADJUSTMENTS
4-1. Mechanical Adjustments .................................................... 8
4-2. Electrical adjustments ........................................................ 8
SECTION 5. DIAGRAMS
5-1. Printed Wiring Board - Tuner Section -..................... 11
5-2. Schematic Diagram - Tuner Section -........................ 13
5-3. Schematic Diagram - Audio Section -....................... 17
5-4. Printed Wiring Board - Audio Section -.................... 21
5-5. IC Pin Functions
IC701 MSM63120B System Control .............................. 25
IC702 SMC62L3A LCD Driver ...................................... 26
SECTION 6. EXPLODED VIEWS
6-1. Case and Tuner Board Section ........................................ 28
6-2. Audio Board Section ........................................................ 29
6-3. Mechanism Section (WM-EX510-112) ........................... 30
SECTION 7. ELECTRICAL PARTS LIST ............. 31
Notes on chip component replacement
-Never reuse a disconnected chip component.
-Notice that the minus side of a tantalum capacitor may be
damaged by heat.
Flexible Circuit Board Repairing
-Keep the temperature of the soldering iron around 270 °C
during repairing.
-Do not touch the soldering iron on the same conductor of
the circuit board (within 3 times).
-Be careful not to apply force on the conductor when
soldering or unsoldering. Receiving Stations Outside Japan
1 Press BAND-RADIO ON to turn on the radio.
2 Press ENTER. The frequency digits, PRESET and a preset
number flash in the display.
3 Press BAND-RADIO ON for more than 2 seconds. AREA
1 flashes in the display.
4 While AREA 1 is flashing, press PRESET+/-“ repeatedly to
select either area USA (USA and Canada) or Eur
(Europe and other countries) and then press ENTER.
5 Press ASP to store the radio stations (both AM and FM)
automatically.
The Walkman starts searching and storing stations.
6 Press BAND-RADIO ON to select the desired band and
press PRESET+/-“ to select a station.
