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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.
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. Measure the waveform of the oscilloscope when the disc table is rotating.
oscilloscope
SENS (CH1)
TEST (CH2)
GND
SENS
GND
TEST
AUDIO board
TP501
POWER switch
PLUS ONE button
CHECK button
CLEAR button
±
button
≠
button
1
1
1
1
1
3 . 6
ALL DISCS
DISC
SEC
CD1
* *
Rotation time
Lit according to rotational direction
DISC No.
PLUS ONE
