Speaker No Sound - LG SH2 Service Manual

2. SPEAKER NO SOUND

No Sound when you TURN ON the unit.
2-1. Digital AMP (IC701, IC702)
2-1-1. Solution
Replace IC701, IC702 on MAIN board.
2-1-2. How to troubleshoot (Countermeasure)
1) Please check 3.3 V of IC701, IC702 pin13.
If 3.3 V voltage doesn't come out, Replace IC602.
2) Please check 15 V of IC701, IC702 pin2, 3, 34, 35.
If 15.0 V voltage doesn't come out, Replace SMPS Circuit.
3) Please check 3.3 V of IC701, IC702 pin14, 19, 25.
If 3.3 V voltage doesn't come out, check IC101 pin B3, D8, D9.
4) Please check I2S signal of IC701, IC702 pin15, 20, 21, 22 and Replace it.
2-1-3. Service hint (Any picture / Remark)
R719
C734
R720
C701
C702
R701
R702
R703
R704
R705
R706
R713
R714
R715
R718
FB702
ONE POINT REPAIR GUIDE
C732
C731
C712
C711
C733
NO VIA, CLOS
IC701
TAS5733
< Schematic point >
IC701 IC701
< MAIN board bottom view >
C703
C760
R733
R730
R707
R732
R731
R708
R736
R735
R729
R734
IC702 IC702
3-3
C741
R724
C754
C742
C765
C730
R723
C763
R737
IC702
TAS5733
FB703