LG M237WD Service Manual page 22

Make sure yo u can t hear any audi o
and Device sup port the au di o sig nal
Check Speaker and it s w ire
con nectio n (P500)
An d the resistance
Check 15V From Po wer board
(P700, Pin #1,2)
An d Check Aud io Amp Pow er 12V
(IC501, Pin#2, 3, 3 4, 35, 40, 41, 44, 45)
Check Sig nal from IC501
L502, L503, L504, L505
Check Sig nal from IC101
(R130, R131, R1021, R1022)
2009
Copyright LG Electronics. Inc. All right reserved.
C
Only for training and service purposes
8. All Source Audio Trouble Shooting
norm ally .
Y
Y
Y
Y
N
Replace co nnector or Speaker
N
Replace P ower Board or Check
N
N
- 22 -
L511
Replace IC 500
Replace IC 101
LGE Internal Use Only