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CD-C1H/CP-C1H
– 49 –
• Although HF waveform is normal and time
indication is normal, no sound is not output.
Check the IC2 pin 48 (EFLG).
Check the IC2 pin 37 and pin 40.
Check IC501 and POWER AMP. IC901.
Yes
Yes
No
Usually, the number of pulses of flawless disc is 100 pulses/sec
or less.
• Check the tracking system.
Data cannot be read.
Check the waveform of IC1 pin 7 (TE).
The waveform shown in Figure 49-1
appears, and no disc state appears
soon.
Yes
Check the periphery of IC1 pin 8 to
pin 15, and IC5 to CNP2.
Tracking servo is inoperative.
Check the VCO-PLL system.
Yes
Yes
Playback is possible in TEST mode.
Yes
Normal jump is
impeded, and the
program top
cannot be
reached.
Playback is impossible
although initialization
is possible.
Yes
Yes
Check the
periphery of IC1
pin 14.
Figure 49-1
3
4
5ms
1.00 V
IC1 7 TE
5 ms
5.0 V
IC1 54 DRF
• Check the spindle system
Yes
Yes
Play operation is performed without disc.
The turntable rotates a little.
The turntable fails to rotate or rotates at high speed.
The spindle driver is normal.
No
• Checking the VCO-PLL system.
Play operation is performed when disc exists.
Yes
Although the HF waveform is normal, TOC data cannot be
read.
No
Check the periphery of IC1 pin 23 to pin 27, pin 39, pin 40, IC2
pin 12, pin 13, from IC3 to CNP3.
No
Check the PDD waveform of IC2 pin 3. (Figure 49-2)
Check the IC1 pin 43, pin 44, IC2 pin 3, pin 5, pin 7, pin 10, and
pin 11.
Abnormal
Figure 49-2
2
3
0.5s
1.00 V
IC2 3 PDO
0.5s
1.00 V
IC2 16 FD
Stop -- > Play
As VCO frequency is
locked at 4.32 MHz,
voltage of PDD rises
and stabilizes.
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