Speaker No Audio Output - LG FB165DAB Service Manual

2. SPEAKER NO AUDIO OUTPUT

No audio output problem occurs when you power on the unit.
2-1. Solution
Reassemble AMP IC heat-sink, replace IC101.
2-2. How to troubleshoot (Countermeasure)
1) Reassemble AMP IC heat-sink (heat-sink screw must be assembled tightly).
2) Still NG, please check CN902 Pin1(12 V), Pin 2, 3 (25 V)
3) If it is not appear Vcc, change SMPS board assembly.
4) After changing it, if Vcc is still NG, check CN901 Pin8 (P-CTRL).
5) CN901 Pin8 Vcc is not appear, change -com IC (IC101).
2-3. Service hint (Any picture / Remark)
CN902
CN901
< SMPS board top view >
IC101
< MAIN board top view >
ONE POINT REPAIR GUIDE
3-27
Heatsink
< AMP board top view >