Servicing Notes; Setting; Play/Ff/Rew Modes; Preset State - Sony Wm-Ex527 Service Manual

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This set detects the rotation of the idler gear (A) (side S) using the
PH701 (photo reflector). 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 (M901) 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 (M901) and the
plunger (PM901) 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 the TAPE DETECT switch (S901-1) terminals and the
ATS switch (S901-2) terminals.
(4) Connect the AF oscillator to the TP36 (PHOTO IN) and the
TP46 (GND).
(5) Supply 1.3 V to the battery terminals using the regulated
power supply.

2. Preset state

To set the 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 follow.
(2) Move the DIRECTION switch (S701) to the side, which the
slider (NR) is facing.
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(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.
– MAIN Board (Side B) –
TAPE DETECT
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SERVICING NOTES

ATS
(S901-1)
(S901-2)
FF
(S704)
Y REPEAT
(S703)
AF oscillator
x ao
y
+
i
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SECTION 1
8
3. FF, REW modes
(1) Check that the preset state is set.
(2) Input the square wave or sine wave to the TP36 (PHOTO IN)
and the TP46 (GND).
(3) Press the
(4) Press the
4. PLAY mode
(1) Check that the preset state is set.
(2) Input the square wave or sine wave to the TP36 (PHOTO IN)
and the TP46 (GND).
(3) Press the
(4) Press the
(NR) once towards the side R and then to the side F. Move
the DIRECTION switch (S701) according to this timing will
set the PLAY mode (side F). Press the
(S703) another time and move the DIRECTION switch
(S701) according to the movement of the slider (NR) will set
the PLAY (R mode).
Note 1: If the above fails, perform from preset again.
Note 2: Use the
[REW]
sible. 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.
Q Q
3 6 7 1 3
connect to the plunger
(PM901)
battery
terminal 3
PH701
x
(S702)
REW
FUNCTION
(S705)
(S708)
TP36
FWD T CENTER t REV
(PHOTO IN)
TP46
(GND)
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.
square wave
(sine wave)
10 Hz, – 3.5 dB
2 9 9 4 2 8
x button (S702) to set the STOP mode.
[FF] [REW]
button (S704) or the
x button (S702) to set the STOP mode.
button (S703) will move the slider
bB REPEAT
bB REPEAT (S703), x (S702),
(S705) buttons on the remote controller as much as pos-
1 5 0 5 8 2 9 9 4
battery
terminal #
SOUND
(S706)
connect to the
motor (M901)
S701
DIRECTION
m
co
WM-EX527
9 9
button (S705).
button
bB REPEAT
[FF]
(S704), and
2 8 9 9
3