Ver 1.0 1999.03
MICROFILM
WM-PSY02
SERVICE MANUAL
RADIO CASSETTE PLAYER
SPECIFICATIONS
US Model
Canadian Model
· Frequency range
For U area indication: FM: 87.5-108MHz
AM: 530-1710kHz
For E area indication: FM: 87.5-108MHz
AM: 531-1602kHz
· Power requirements
3V DC batteries AA (R6)
× 2/External DC 3V
power sources
· Dimensions
115
× 90.5 × 34.4mm (4 5/8 × 3 5/8 1 3/8 inches) (w/h/d)
incl. projecting parts and controls
· Mass
Approx. 150g (5.3 oz)
Approx. 230g (8.2 oz) incl. batteries and a tape
· Supplied accessories
Stereo headphones or earphones (1) /
Bumper guard (1)/Chain (1)
Design and specifications are subject to change without notice.
Model Name Using Similar Mechanism
WM-FX251
Tape Transport Mechanism Type
MF-WMFX251-114
2
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 ............................ 6
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 .................................... 25
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
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.
Mark
Center frequency
red
10.70MHz
blue
10.67MHz
orange
10.73MHz
black
10.64MHz
white
10.76MHz
mark
CF2
X2
SERVICING NOTES
SECTION 1
GENERAL
This section is extracted from
instruction manual.
3
SECTION 2
DISASSEMBLY
Note : Follow the disassembly procedure in the numerical order given.
2-1. CABINET (FRONT) ASSY
r
The equipment can be removed using the following procedure.
Cabinet (Front) ASSY
Set
Main board
Cassette holder
Mechanism deck
(MF-WMFX251-114)
Belt, Motor (Capstan/Reel) (M901),
Playback head (HP901)
J
I
H
G
F
E
D
C
B
N
M
L
K
Joint (MB)
S306
Cabinet (front) ASSY
Cassette holder
A
Cabinet (front) ASSY
1 Insert the precision screwdriver
(1.4 mm flat-blade) in to the slit
at claw Aand release the claw.
Note: To avoid the damage to the
cabinet, wrap a point of
screwdriverwithcloth.
2 Remove the cabinet (front) ASSY.
(Release all claw
Bto Nin
alphabeticalorder.)
Note: On installation cabinet (front) ASSY
adjust the S306 and joint (MB).
4
2-3. CASSETTE HOLDER
2-2. MAIN BOARD
3 Screw (M1.4)
5 Main board
4 Two claws
1 Flexible board
(CN301)
2 Remove the
four solders.
A
B
3
2
Center cabinet
5 Torsion spring
1 Open the cassette holder.
4 Cassette holder
2 Insert a precision screwdriver
(1.4mmflat-blade)vertically
in to portion Ato release the
hinge plate.
3 Portion Bto release the
hinge plate.
5
2-4. MECHANISM DECK (MF-WMFX251-114)
2-5. BELT, MOTOR (CAPSTAN/REEL) (M901), PLAYBACK HEAD (HP901)
1 Insert the precision screwdriver
(1.4 mm flat-blade) in the slit
and relese two claws.
2 Remove the mechanism deck
(MF-WMFX251-114) in the
direction of the arrow A.
A
2 Two screws
(M1.4
× 1.6)
3 Motor (capstan/reel)
(M901)
4 Screws (M1.4)
5 Playback head (HP901)
1 Belt