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SENSOR SECTION
Disc Sensor Level Adjustment
Procedure:
1.
Connect an oscilloscope to TP (DISC SENSOR) and TP (GND)
on the MAIN board.
2.
Turn the power on.
3.
In the no disc status, adjust RV301 on the MAIN board so that
the waveform of oscilloscope becomes as below. And check
the peak to peak level is more than 4 Vp-p.
Waveform when no disc
NG
4.
Insert a disc into the disc slot No. 58.
5.
Check that the waveform of oscilloscope as below. And adjust
RV301 on the MAIN board so that the peak to peak level
becomes less than 0.5 Vp-p besides becomes as little as possible.
Waveform when disc in
TE
L 13942296513
6.
Check that the waveform and peak to peak level satisfy
specification of step 4. If it is wrong, repeat from step 4 until
satisfy.
Adjustment Location:
[MAIN BOARD] (CONDUCTOR SIDE)
RV301
Disc Sensor Level
Adjustment
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turn the RV301
more than 4 Vp-p
OK
less than 0.5 Vp-p
TP (GND)
TP (DISC SENSOR)
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