LG 42LG30 - Page 22

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Only for training and service purposes
LGE Internal Use Only
All Source Audio
Make sure you can’t hear any audio
Check Output Signal
L503, L504
Replace NTP or check output line.
Y
N
Check IC501 Power 16V, 3.3V, 1.8V
Check power supply regulator & line.
Y
N
Check Connector & P500
Y
Check Mstar I2S Output
R1048, R1050, R1051
Y
Check signal line. Or replace IC100
N
Replace connector if found to be
damaged
N
Check speaker resistance and cone for
damage.
Y
Replace speaker
Y
Digital TV Audio
Check video output
Follow procedure All source audio trouble
shooting guide
Y
Follow procedure digital TV video
trouble shooting guide.
N
N
Replace Mstar IC