TCS-100DV - Sony Audio Service Manual (repair manual). Page 3

– 3 –

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) 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.

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

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).

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).

If the above fails, perform from preset again.

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.

When using headphones, the timing for move the DIRECTION
switch (S701) can be determined from the beep sound.

←

→

# 3