Audio Speaker (25 V / 30 V) - LG HT806TGW Service Manual

2. NO AUDIO SPEAKER (25 V / 30 V)
No power problem occurs when you power on the unit.
2-1. Solution
Replace D955, IC901, PC902, IC953 and Q900, PC901 on SMPS board.
2-2. How to troubleshoot (Countermeasure)
1) 25 V/ 30 V Abnormal: Check CN901 pin1, 2, 3 of SMPS board.
2) D955, IC901, PC902, IC953 and around components --> Replace these.
3) Another case if there is no VC supply for IC901, please replace Q900, PC901.
2-3. Service hint (Any picture / Remark)
PC901
Q900
ONE POINT REPAIR GUIDE
CAUTION:
Danger if fuse is incorrectly replaced.
Replace only with the type identical to fuse rating
and(or) model name described in main label.
< SMPS board top view >
2-27
Warning
Parts that are shaded are critical with
respect to risk of fire or electrical shock.
CN901
D955
IC953
PC902
IC901