LG 47LH90 Service Manual page 49

LA92B-LH40/LH55 Trouble shooting guide – HDMI
Check input connect JK500,JK501,JK502,JK503
Can you see the normal waveform?
YES
Check DDC communication lines
(IC502)
YES
Check HDCP communication lines(IC105)
YES
Check the output of TDA9996HL(IC502)
_HDMI1,2,3 or HDMI4. .
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
JK500,JK501,JK502,JK503 may have problem. Replace this Jack.
NO
After checking the Power of this chip, you should decide to replace this or not.
NO
After checking the Power of this chip, you should decide to replace this or not.
NO
After checking the Power & Select Pin & Etc of this chip, you should decide to replace this or not.
NO
After checking the Power & Select Pin & Etc of this chip, you should decide to replace this or not.
NO
After checking the Power & Select Pin & Etc of this chip, you should decide to replace this or not.
Audio(In)
LGE Internal Use Only