Sony Walkman WM-FX488 Service Manual

2
WM-FX488
Specifications ........................................................................... 1
1. GENERAL ...................................................................... 2
2. DISASSEMBLY
2-1. Cabinet (Front), Cabinet (Center) ............................... 3
2-2. Main Board ................................................................. 3
2-3. Mechanism Deck ........................................................ 4
2-4. Belt, Capstan/reel Motor (M601),
Magnetic Head (Playback) (HP601) ........................... 4
2-5. Holder, Cassette .......................................................... 5
3. ADJUSTMENTS
3-1. Mechanical Adjustments ............................................. 6
3-2. Electrical Adjustments ................................................ 6
4. DIAGRAMS
4-1. Explanation of IC Terminals ....................................... 9
4-2. Block Diagram .......................................................... 10
4-3. Printed Wiring Boards ............................................... 11
4-4. Schematic Diagram – Main Section (1/3) – ............. 12
4-5. Schematic Diagram – Main Section (2/3) – ............. 13
4-6. Schematic Diagram – Main Section (3/3) – ............. 14
4-7. IC Block Diagrams ................................................... 15
5. EXPLODED VIEWS
5-1. Cabinet Section ......................................................... 17
5-2. Mechanism Deck Section
(MF-WMFX488-114) ....................... 18
6. ELECTRICAL PARTS LIST ................................... 19
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.
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
TABLE OF CONTENTS
SECTION 1
GENERAL
N PLAY **
M
m
VOL*
MODEs/d
i
xSTOP
DIRY
ENTER
AM
FM
RA DI O OFF
HOLD
MENU
SET
PRESET/TUNING
+/ –
* There is a tactile dot beside VOL on the main unit to show the direction to turn up the volume.
** The button has a tactile dot.
This section is extracted from
instruction manual.

Sony Walkman WM-FX488 Specifications

Power

power requirements	DC 1.5V, AA Battery x 1
battery life (play)	35 Hours w/Sony Alkaline Battery
battery life (tuner)	40 Hours w/Alkaline Battery

Frequency Range

FM frequency range	87.5-108MHz
AM frequency range	530-1710kHz
TV frequency range	Channels 2-13
Weather Band frequency range	Channels 1-7

Weight and Dimensions

weight	158 g
width	83.6 mm
height	112 mm
depth	28.3 mm