Copyright ⓒ 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
12. Component / RGB / AV Audio Trouble Shooting
Y
Check Jack JK700/JK703/JK704
N
Y
Check Signal
CXA2069 #9, #11 Pin (Comp1)
CXA2069 #16, #18 Pin (Comp2)
CXA2069 #29, #31 Pin (RGB)
CXA2069 #2, #4 Pin (AV1)
CXA2069 #23, #25 Pin (AV2)
N
Replace Jack
Check Video Output
Replace one of
C1143/R1156/C1142/R1155
C1141/R1154/C1140/R1153
C1152/R1176/C1151/R1175
C1126/R1140/C1127/R1141
C1154/R1182/C1155/R1183
& Recheck
N
Follow procedure external input
video trouble shooting
Y
Check Signal
CXA2069(IC1102) #52, #54 Pin
N
Y
Check Signal
C204, C205
N
Replace one of
Q1100/Q1102/R202/C204/
R203/C205& Recheck
Checl IC1102 Power Level 9V
at L1110
N
Replace It
Y
Replace IC1102 & Recheck
Y
Follow procedure All source audio
trouble shooting
N
Maybe BCM3556 audio block has
problems. Replace It
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