MICROFILM
CASSETTE PLAYER
Tourist Model
Model Name Using Similar Mechanism
NEW
Tape Transport Mechanism Type
MT-WMEX550-125
SPECIFICATIONS
SERVICE MANUAL
WM-WE1
2
TABLE OF CONTENTS
1.
SERVICE NOTE ....................................................... 2
2.
GENERAL ................................................................... 5
3.
DISASSEMBLY ......................................................... 6
4.
MECHANICAL ADJUSTMENT .......................... 11
5.
ELECTRICAL ADJUSTMENT ............................ 11
6.
DIAGRAMS
6-1. Block Diagram ................................................................ 13
6-2. Schematic Diagram MAIN Section ........................... 15
6-3. Printed wiring Board MAIN Section ......................... 19
6-4. Printed wiring Board TMR Section .......................... 22
6-5. Schematic Diagram TMR Section ............................ 25
6-6. IC Pin Function Description ........................................... 29
7.
EXPLODED VIEWS ................................................ 30
8.
ELECTRICAL PARTS LIST ............................... 33
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.
Flexible Circuit Board Repairing
· Keep the temperature of the soldering iron around 270 °C dur-
ing 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.
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 PUB-
LISHED BY SONY.
SECTION 1
SERVICE NOTE
Service Mode
Mode for operating the mechanism section with the MAIN board
and TMR board opened.
1. Setting
1) Refer to "3. Disassembly", and remove the cabinet and open
the MAIN board and TMR board.
2) Connect the motor and plunger to the MAIN board using
jumper wires. These can be connected easily with the use of
the extension tool (1-769-143-11) (ten in one set).
3) Turn OFF the [BL SKIP] switch (S703).
4) Connect the MAIN board to the TMR board using flexible
board for service only.
5) Press the
oeREPEAT switch (S3), [FF] switch (S2) and
supply 1.2V to the
` and ' terminals of the battery using a
regulated power supply.
2. Preset state
To set the PLAY, FF, REW modes, the preset state must be set.
1) Check that the lever (SW) and F/R switch (S702) are set to the
center position. If not, set the preset state as follows.
2) Move the F/R switch (S702) to the side which the lever (SW)
is facing.
3) The lever (SW) will move when the regulated power supply
switch is set to OFF once and then set to ON. Move the F/R
switch (S702) according to this timing and set to the center
position.
3. FF, REW Modes
1) Check that the preset state is set and press the [FF]
and [REW] switches.
4. PLAY mode
1) Check that the preset state is set.
2) Pressing the
oeREPEAT switch on the keyboard unit will
move the lever (SW) once towards the F side and then to the R
side. Moving the F/R switch (S702) according to this timing
will set the PLAY mode (R side). Pressing the
oeREPEAT
switch another time and moving the F/R switch (S702) ac-
cording to the movement of the lever (SW) will set the PLAY
(F side) mode.
Note 1: If the above fails, perform from preset again.
Note 2: Do not touch the
oe, p, FF, REW switches with your
hands, but using a stick with a round tip.
Note 3: When using headphones, the timing for moving the S702
can be determined from the beep sound.
3
Connect to
plunger
S702 F/R Switch
(FWDnSTOPnREW)
Center
Connect to
motor
Battery
terminal (+)
Battery
terminal ()
Flexible board for service only
Side F N
nSide R
IC701
IC301
CN1
MAIN Board
-- Side B --
TMR Board
-- Side A --
Lever (SW)
senter
lever (SW)
side R
side F
Precaution
When act repair, take the main unit and wireless receiver of a cus-
tomer, because rewriting ID code to some parts replacement.
After repair check the main unit action control from the wireless
receiver.
Rewriting ID Code
The main unit action control from the wireless receiver in this set.
Make a 14 ID codes (0001 ~ 1110) and each set include, because
protecting wrong action from another set operation signals.
The ID code rewrite to wireless receiver replacement and EEPROM
(IC704) replacement (Lost of ID code data.)
Method
1. Turn ON the WIRELESS switch (S704) of main unit. (Don't
connect to headphones.)
2. Press the two buttons
p and [REW] simultaneously and the
LED light of main unit.
3. Straighten headphones cord and press continue
oeREPEAT
button, then LCD displays ID code. (4 figure, 0 or 1 charac-
ters.)
4. Battery remove, the ID code rewriting complete.
5. After repair check the action.
Check ID code main units
1. Turn ON the WIRELESS switch (S704) of main unit. (Don't
connect to headphones.)
2. Straighten headphones cord and close the main unit.
3. Press the two buttons
p and [FF] simultaneously and the
LED light ON of main unit, then press
oeREPEAT button
and LCD displays main units ID code of wireless receiver.
Check ID code wireless receivers
1. Press continue [CH] button, and insert battery of wireless re-
ceiver
2. LCD displays wireless receivers ID code.
4
Rotation system
Rotation system during PLAY.
Rotation system during FF.
Rotation system during REW.
gear (TB)
gear (REEL)
(T side)
gear (Y)
gear (NR)
motor pulley
pulley (reverse)
clutch ass'y (M)
flywheel (R) ass'y
flywheel (N) ass'y
gear (FR)
(FF: left side)
Pulley (reverse)
flywheel (R) ass'y
flywheel (N) ass'y
gear (Y)
gear (TA)
gear (TB)
gear (S)
motor pulley
gear (REEL)
(S side)
gear (NR)
(REV: right side/
FWD: left side)
gear (REEL)
(T side)
clutch ass'y (M)
gear (NR)
gear (Y)
gear (S)
flywheel (N) ass'y
flywheel (R) ass'y
pulley (reverse)
clutch ass'y (M)
motor pulley
gear (REEL)
(S side)
gear (FR)
(REW: right side)
5
SECTION 2
GENERAL
This section is extracted from
instructio n man ual.