Sharp CD-M4000W Service Manual page 44

When a disc is loaded, start play operation.
I
The HF waveform is normal, but the TOC data cannot be
read.
Check the PDO waveform. (Figure 44-l)
Check around pins 73-78 on ICl.
The HF waveform is normal and the time is displayed
normally, but no sound is produced. Or the sound
has dropouts.
1. When playing at normal speed.
Check the peripheral circuit at pin 39 (DOUT) on ICl and
the waveform (Figure 44-2).
No
makes error correction impossible.
Figure 44-1