Amp Protection - LG HB954TB Service Manual

ELECTRICAL TROUBLESHOOTING GUIDE

2. AMP PROTECTION

"PROTECTION" appears on the FLD.
YES
After unplug power cord, connect again.
YES
Power on.
YES
"PROTECTION"
appears continuously
on the FLD.
YES
Is the IC101 pin27
"LOW" signal(0V)?
YES
Is the Q701, Q702*
and Q703 normal?
YES
Replace TI AMP IC
(IC701, IC702, IC703*, IC704*)
* 5.1Ch Option
NO
NO
Replace IC101.
NO
Replace the Q701, Q702* and Q703.
2-31
OK.