Is pin 35 (C2F) on IC2 "L"?
Yes
No
The HF waveform is normal and the time is displayed
normally, but no sound is produced. Or the sound
has dropouts.
(5) Others
There are too many error flags on a damaged disc which
makes error correction impossible.
Check again using a known good disc.
1. When playing at normal speed
Check the peripheral circuit at pin 37 (DOUT) on IC2 and
the waveform (Figure 40-2).
If 1. is OK.
When a disc is loaded, start play operation.
(4) PLL system check
The HF waveform is normal, but the TOC data cannot be
read.
Check the PDO waveform. (Figure 40-1)
Check around pins 1~6 on IC2.
Figure 40-1
Figure 40-2
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