Sharp XL-DV60 Service Manual page 54

XL-DV60
(4) Others.
When toc can read out and play normal, but no sound, please check as the following steps:
Is the waveform correct?
(Waveform drawing Figure 6)
Is U1 output L/R and sub woofer normally?
Is J1 connect correctly?
Check CNP904 if connect well.
Figure 6
Yes
Yes
Yes
Check U9.
No
Change U1.
No
Connect J1 well.
No
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