LG 47LH90 Service Manual page 48

LA92B-LH40/LH55 Trouble shooting guide – AV/Component/RGB-PC
Check JK1206, JK1202, JK1205
Can you see the normal waveform?
YES
Check the input (PinAA3,Y1,AE1,AF3,AE3,AE2,AA1
AB1,AB2,AC2,AB3,AC3) of LGE3159(IC100).
Can you see the normal waveform?
YES
Check the Output (Pin Audio_MASTER_CLK ,MS_LRCK
MS_SCK,MS_LRCH) of LGE3159(IC100).
Can you see the normal waveform?
YES
Check IC600(NTP-3100L) L606/L607
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Only for training and service purposes
NO
JK701, JK707, JK700, JK702, JK703 may have problem. Replace this Jack.
NO
After checking audio signal line, you should decide to replace item or not.
NO
After checking audio signal line, you should decide to replace item or not.
NO
After checking audio signal line, you should decide to replace item or not.
Audio(In)
LGE Internal Use Only