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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 MAIN board.
3. While pressing the
[CLEAR] and [PLUSONE] 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
73** .
ALL DISCS
DISC
CD1
SEC
DISC No.
Lit according to rotational direction
Blinks
PLUS ONE