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TABLE OF CONTENTS
1. SERVICING NOTES
............................................... 3
2. GENERAL ................................................................... 5
3. DISASSEMBLY ......................................................... 6
4. MECHANICAL ADJUSTMENT .......................... 11
5. ELECTRICAL ADJUSTMENT ............................ 11
6. DIAGRAMS
6-1. Block Diagram - AUDIO Section - .............................. 13
6-2. Block Diagram - MAIN Section - ................................ 15
6-3. Printed Wiring Boards ..................................................... 18
6-4. Schematic Diagram ......................................................... 21
6-5. IC Pin Function Description ........................................... 28
7. EXPLODED VIEWS ................................................ 30
8. ELECTRICAL PARTS LIST ............................... 33Flexible Circuit Board Repairing
- Keep the temperature of the soldering iron around 270 ΛC 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.
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.
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SECTION 1
SERVICING NOTES
SERVICE MODE
This set detects the rotation of the idler gear (A) (side S) using the
photo reflector (PH701). The PH701 is mounted on the MAIN
board, therefore the idler gear (A) (side S) cannot be detected with
the MAIN board removed. As a result, the motor (M601) cannot
be controlled, causing malfunction.
Further, the DIRECTION switch (S701) is also mounted on the
MAIN board, and with the board removed, the mechanism posi-
tion cannot be detected and the operation is not changed over.
Therefor, when the voltage check is executed with the MAIN board
removed, follow the procedure provided below.
1. Setting
1) Refer to 3. DISASSEMBLY, and remove the MAIN board.
2) Connect the MAIN board to the motor (M601) and the plunger
(PM701) using jumper wires. These can be connected easily
with the use of the extension tool (Part No. 1-769-143-11) (ten
in one set).
3) Short each terminals of REC PROTECT DETECT (REV)
switch (S702-1), TAPE DETECT switch (S702-2), REC PRO-
TECT (FWD) switch (S703-1) and ATS switch (S703-2).
4) Connect the AF oscillator to the TP33 (PHOTO IN) and the
TP40 (GND).
5) Supply 1.3 V to the battery terminals using the regulated power
supply.
2. Preset state
To set the REC, PLAY, FF, REW modes, the preset state must
be set.
1) Check that the slider (NR) and the DIRECTION switch (S701)
are set to the center position. If not, set the preset state as fol-
low.
2) Move the DIRECTION switch (S701) to the side, which the
slider (NR) is facing.
3) The slider (NR) will move when the regulated power supply
switch is set to OFF once and then set to ON. Move the DI-
RECTION switch (S701) according to this timing and set to
the center position.
M
Y m
Y
3. FF, REW modes
1) Check that the preset state is set.
2) Input the square wave or sine wave to the TP33 (PHOTO IN)
and the TP40 (GND).
3) Press the
[FF/CUE ] button (S4)
or the
[REW/REVIEW ] button (S5).
4. REC, PLAY modes
1) Check that the preset state is set.
2) Input the square wave or sine wave to the TP33 (PHOTO IN)
and the TP40 (GND).
3) Press the
[REC] switch (S6) or [PLAY/DIR ] botton (S3)
will move the slider (NR) once towards the side R and then to
the side F. Move the DIRECTION switch (S701) according to
this timing will set the REC or PLAY mode (side F). Press the
[REC] switch (S6) or [PLAY/DIR ] botton (S3) another
time and move the DIRECTION switch (S701) according to
the movement of the slider (NR) will set the REC or PLAY
mode (side R).
Note 1:If the above fails, perform from preset again.
Note 2:Use each button on the remote controller as much as possible. If
no remote controller, do not touch the buttons with your hands,
but using a stick with a round tip.
Note 3:When using headphones, the timing for move the DIRECTION
switch (S701) can be determined from the beep sound.
REC PROTECT
DETECT (REV )
switch
S702-1
- MAIN BOARD (Component Side) -
TAPE DETECT
switch
S702-2AT S
switch
S703-2REC PROTECT
DETECT (FWD)
switch
S703-1
connect to
plunger (PM701)
connect to
motor (M601)
DIRECTION
FWD -STOP- REV
battery terminal
#3
TP40 (GND)
TP33 (PHOTO IN)
AF oscillator
square wave
(sine wave)
10 Hz,-3.5 dB
- MAIN BOARD (Conductor Side) -
S701 +
-
