LG LH-T3520X Service Manual page 20

6. AMP Protection
"PROTECTION" appears on the FLD.
After unplug power cord, connect again.
Power on.
"PROTECTION"
appears continuously on the FLD.
Is the IC101 pin54
"LOW" signal(0 V)?
Is the Q701 and Q702 normal?
Replace ST AMP IC(IC702 and IC703)
YES
YES
YES
YES
YES
YES
NO
NO
NO
Replace the Q701 and Q702.
2-11
OK.
Replace IC101.