Sony DVP-CX995V Service Manual page 36

DVP-CX995V
6-4. DISC DETECT SENSOR ADJUSTMENT
Be sure to perform this adjustment after sensor adjustment in
MECHANICAL ADJUSTMENT. (See page 32)
Connection:
MB board
CN301
DSENS_OUT DSENS_OUT: Pin 3
GND
HH_OUT HH_OUT: Pin 1
Waveform:
CH1
CH2
1. Connect the oscilloscope to pins 1, 2 and 3 of CN301 on
the MB board.
2. Check that no discs are loaded in the unit.
3. Perform from step 1 to step 5 in Pop Up Mechanism
Adjustment. (See page 32)
4. Press the [PAUSE] key, then the table starts to rotate in the
clockwise direction.
5. Turn the RV301 on MB board and adjust so that the H portion
A of DSENS_OUT waveform is twice the width of the H
portion B of HH_OUT waveform.
A
CH1
B
CH2
A = 2 × B
Adjustment Location: MB board
6. Loosen the fixing screw, move the mounting board (SENSOR),
and secure the mounting board (SENSOR) at the point the H
portion of the HH_OUT waveform comes the center of the H
portion of the DSENS_OUT waveform.
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oscilloscope
GND: Pin 2
CH1 CH2
DSENS_OUT
HH_OUT
DSENS_OUT
HH_OUT
D. SENS OUT board
S tight, screw
(PTTWH3 × 6)
CH1
CH2
Should be at the center
DSENS_OUT
HH_OUT