CDP-CX300, CDP-CX335, CDP-CX350, CDP-CX691, SEN-R5900 - Sony Audio Service Manual (repair manual). Page 18

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1. Connect the oscilloscope to Pins 1, 2, and 3 of CN506 of the

MAIN board.

2. Check that no discs are loaded in the unit.
3. With the power ON, while pressing the  GROUP 5  and

§ OPEN/CLOSE  buttons, press the  +100  button. The disc

table starts to rotate in the clockwise direction.

4. Loosen the fixing screw, move the mounting board (SENSOR),

and secure the mounting board (SENSOR) at the point the H
portion of the P.T waveform comes the center of the H portion
of the D.S waveform.

Be sure to perform this adjustment after sensor adjustment in ME-
CHANICAL ADJUSTMENT.

5. Rotate the  DISC/CHARACTER  knob in the counterclockwise

direction and the disc table starts to rotate in the same direction.
Check that the waveform at this time is the same as that in step
4. If larger by a considerable extent, rotate the  DISC/CHAR-
ACTER  knob in the clockwise direction and the disc table starts
to rotate in the same direction. Repeat from step 4.

6. Rotate RV501 of the MAIN board and adjust so that the H and L

portions of the D.S waveform become the same.

Fixing screw

Mounting board (SENSOR)

D.S: Pin 

1

T.P: Pin 

3

GND: Pin 

2

oscilloscope

D.S
GND
T.P

MAIN board

CN506

D.S

P.T

D.S

P.T

Should be at the center

D.S

Adjust so that these widths
become the same.

Adjustment Location: MAIN board