Time Shift Sound And Recorded Video Sound ( Dvr Board ) - LG 42PC1RR-ZL Service Manual

8. Time shift sound and Recorded video sound ( DVR BOARD )

(1) Symptom
1) SOUND doesn't come out.
(2) Check following
MUTE key on?
No
Sound cable is OK?
No
Connect speak cable
Sound is ok?
No
Yes
Turn off the mute key.
Yes
Are power cables
connected well.
No
Connect power cables
/power B/D.
Yes
Is 31pin cable ok?
Check speakers
Are they ok?
Check U13, U14, U1, U7
Check MSP(IC406),
IC404 Is it ok?
- 28 -
No
Connect 31p cable.
Yes
No
Change the speakers.
Yes
No
Change the ICs
Yes
Change B/D.
Is it ok?
No