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CD-MPX100E
(1) Focus-HF system check.
Although a CD is inserted and the cover is closed, "NO DISC" is
displayed.
Press the Tray1 CD Eject Button without inserting a disc, and try
starting the playback operation.
1. Does the pickup move to the PICKUP-IN Switch (SW4) posi-
tion ?
2. Does the focus (lens) move up and down ?
(Waveform drawing Figure 1)
3. Is the laser lit ?
4. Is the turntable rotating ?
When a disc is loaded, start playback operation.
1. Is focus servo activated ?
(Waveform drawing Figure 2)
3. Is the HF waveform normal ?
(Waveform drawing Figure 3)
Figure 2
Yes
Yes
Yes
Yes
No
Sled motor (M2).
No
Check the focus peripheral circuit.
No
Check the laser diode driver Q1 peripheral circuit.
No
Spindle motor (M1).
No
Pins 5~8, 14, 18 and 19 on IC1
Check the laser diode driver Q1 peripheral circuit.
No
If the level is not normal.
7 – 2
Figure 1
Vp-p=1.0 V~1.3 V
0.5 mV/div,0.5 µsec/div
Figure 3
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