Sound - LG S94T1-S Service Manual

ELECTRICAL TROUBLESHOOTING GUIDE
3. NO SOUND
No sound
Check sound status.
Sound cut off irregularly.
Check LED status.
LED is Red.
AMP PVDD
(RCN301 pin6 ~ 8) no output.
AMP 12 V (RIC311 pin2)
no output.
3 .3 V (RIC307 pin4)
no output.
Check module or connection.
NO
YES
NO
NO
NO
YES
Turn off the equipment that gives interference.
YES
YES
Check SMPS board.
YES
YES
5-10
interference.
Wireless reset.
Check RIC311.
Check RIC307.