CDP-CX57 - Sony Audio Service Manual (repair manual). Page 14

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To adjust the mechanism section, enter the mechanism section adjustment mode.
For how to enter the mechanism section adjustment mode, refer to each adjustment section.

1. Make sure that there is no disc in the unit.
2. Connect an oscilloscope to TP501 of the MAIN board.

3. While pressing the 

[CLEAR]

 and 

[PLUS ONE]

 buttons at the same time and turn ON the power.

4. The fluorescent indicator tube shows as follows, and the mechanism section adjustment mode is set.

5. The disc table rotates in the clockwise direction. The disc table rotation time is displayed with ‘’PLUS ONE” slit as a measuring point.
6. Press the 

[CLEAR]

 button, to be rotated the disc table counterclockwise.

7. Measure the waveform of the oscilloscope when the disc table is rotating.

GND

oscilloscope

HHOUT
D.SENS

D.SENS (CH1)

HHOUT (CH2)

GND

MAIN board
TP501

CHECK button

CLEAR button

PLUS ONE button

≠

 button

±

 button

I/

u

 button

ª

P

51

7

3

* *

.

ALL DISCS

DISC

CD1

SEC

DISC No.

Lit according to rotational direction

Blinks

PLUS ONE