Section 3. Dvd & Amp Part; Electrical Troubleshooting Guide - LG SH52TH-C Service Manual

SECTION 3. DVD & AMP PART

ELECTRICAL TROUBLESHOOTING GUIDE

1. AMP PROTECTION
"PROTECTION" appears on the FLD.
After unplug power cord, connect again.
Power on.
"PROTECTION"
appears continuously on the FLD.
Yes
Is the IC101 pin64
"LOW" signal(0V)?
Yes
Is the Q703, Q704 and 705 normal?
Yes
Replace TI AMP IC(IC701~704).
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Only for training and service purposes
No
No
Replace IC101.
No
Replace the Q703, Q704 and Q705.
3-1
OK.
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