Sharp XL-30V Service Manual page 48

XL-30V
• No sound is heard.
Whilst the disc is playing, is a signal present at pins 89, 90, 91 on
IC15V? (Refer to the waveform shown in Figure 48.)
Is an audio signal present at pins 45 ~ 48 on IC14V?
Is an audio signal present at pins 1 and 3 on BI101/CNS101 ?
Is the voltage at pin 5 (MUTE) on BI101/CNS101 about 12V ?
Yes
Yes
Yes
IC15 is defective.
No
IC14 is defective.
No
Check IC11V and the peripheral parts.
No
90 pin
BLCK
89 pin
AUDATA
91 pin
LR
– 48 –
Figure 48
2µs / d