Section 2. Service Note - Sony WM-FX822 Service Manual

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[Service Mode]
Mode which enables the mechanism to be operated with the
MAIN board opened.
1. Setting
1) Refer to "Disassembly" and remove the cabinet and open the
MAIN board.
2) Connect the MAIN board to the motor and plunger using a
jumper wire. Use "Extension tool (1-769-143-11) (one set 10
tools)" to make connection simple.
3) Short-circuit theTP52 and GND by soldering.
4) Turn OFF the BL SKIP switch.
5) Apply a square wave signal or a sine wave signal to TP52.
(see the right figure)
6) Supply 1.3V to the battery terminals (+) and (–) using a
stabilized power supply.
2. Preset State
This state must be set to set the PLAY, FF, and REW modes.
1) Check that the lever (NR SW) is at the center and F/R switch
(S701) is at the center. If not, set the preset state as follows.
2) Move the N/R switch (S701) according to the side faced by
the lever (NR SW).
3) Turn OFF the stabilized power supply switch once and then
turn it ON again so that the lever (NR SW) can be moved.
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Move the N/R switch (S701) according to this timing and set
to the center.
3. FF REW Mode
1) Check the "2. Preset State" and press the FF switch and
REW switch.
4. PLAY Mode
1) Check the "2. Preset State".
2) Press the œ switch. The lever (NR SW) will move to the F
side once and then to the R side. Move the N/R switch
(S701) according to this timing to set the PLAY (R side)
mode. Press the œ switch another time and move the N/R
switch (S701) according to the movement of the lever (NR
SW) to set the PLAY (N side) mode.
Note 1: If the above cannot be performed, start again from preset.
Note 2: Use the remote control œ, p, FF, and REW switches as
much as possible. If the remote control is not available, do
not touch switch with the hand and use something with a
round tip to press them.
Note 3: By using a headphone, the timing for moving S701 can be
known by the beep.
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SECTION 2
SERVICE NOTE
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8
[MAIN Board]
TP50
BATT
TO
PLUNGER
FF
REW
— Side A —
— Side B —
Q Q
3 6 7 1 3 1 5
IC702
S701
N SIDE
CENTER
[Lever (NR SW)]
R side
Lever
(NR SW)
co
.
— 4 —
9 4 2 8
AF oscillator
+
SQUARE
–
WAVE
(SINE WAVE)
10Hz, –3.5dB
50KΩ
TP52
ND701
TO
MOTOR
0 5 8 2 9 9 4 2 8
PH701
R SIDE
Center
F side
m
9 9
BATT
9 9