SECTION 5
MECHANICAL ADJUSTMENTS
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.
oscilloscope
GNDSENS (CH1)
TESTTEST (CH2)
SENS
GND
MAIN board
TP501
3. While pressing the CLEAR and PLUS ONE buttons at the same time and turn ON the power.
CHECK button
CLEAR button
POWER switch
? button
PLUS ONE button
 button
4. The fluorescent indicator tube shows as follows, and the mechanism section adjustment mode is set.
Rotation time
DISC No.
PLUS ONE
DISCSEC
3.851
**
Blinks
5. The disc table rotates in the clockwise direction. The disc table rotation time is displaring point.yed with �OPLUS ONE� slit as a measu
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.
N 22 N |
ACEC
