Mechanical Adjustments - Sony CDP-CX55 Service Manual

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.
DISC SENSOR ALIGMENT
1. Make sure that there is no disc in the unit.
2. Connect an oscilloscope to TP501 of the AUDIO board.
MAIN board
TP501
3. While pressing the CLEAR and PLUS ONE buttons at the same time and turn ON the power.
POWER switch
4. The fluorescent indicator tube shows as follows, and the mechanism section adjustment mode is set.
Rotation time
DISC No.
DISC
3.8
**
Blinks
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.

MECHANICAL ADJUSTMENTS

SENS (CH1)
GND
TEST (CH2)
TEST
SENS
GND
CHECK button
PLUS ONE button
SEC
51
SECTION 5
oscilloscope
≠ button
PLUS ONE
— 22 —
CLEAR button
± button