Table Of Contents; General - Sony WM-PSY02 Service Manual

TABLE OF CONTENTS

Specifications ........................................................................... 1
1. GENERAL
...................................................................... 2
2. DISASSEMBLY
2-1. Cabinet (Front) ASSY ................................................ 3
2-2. Main Board ................................................................. 4
2-3. Cassette Holder ........................................................... 4
2-4. Mechanism Deck (MF-WMFX251-114) .................... 5
2-5. Belt, Motor (Capstan/Reel) (M901),
Playback Head (HP901) .............................................. 5
3. MECHANICAL ADJUSTMENTS
4. ELECTRICAL ADJUSTMENTS
Tape Section ....................................................................... 6
Tuner Section ..................................................................... 7
5. DIAGRAMS
5-1. Explanation of IC Terminals ....................................... 9
5-2. Block Diagram .......................................................... 10
5-3. Printed Wiring Boards .............................................. 13
5-4. Schematic Diagram ................................................... 17
6. EXPLODED VIEWS
6-1. Main Section-1 ......................................................... 22
6-2. Main Section-2 ......................................................... 23
6-3. Mechanism Deck Section ......................................... 24
7. ELECTRICAL PARTS LIST
............................ 6
.................................... 25
SECTION 1

GENERAL

- 2 -
SERVICING NOTES
HOW TO CHANGE THE CERAMIC FILTERS
This model is used two ceramic filters of CF2 and X2.
You must used same type of color marked ceramic filters in order
to meet same specifications.
Therefore, the ceramic filter must changed two pieces together
since it's supply two pieces in one package as a spare parts.
CF2
mark
X2
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.
Mark Center frequency
red 10.70MHz
blue 10.67MHz
orange 10.73MHz
black 10.64MHz
white 10.76MHz
This section is extracted from
instruction manual.