LG 47LH90 Service Manual page 50
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Also See for 47LH90:
- Owner's manual (140 pages) ,
- Specifications (2 pages) ,
- Manual de usuario (128 pages)
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LA92B-LH40/LH55 Trouble shooting guide – Speaker
Check the output (Pin A8,B7,C7,D8) of LGE3159(IC100).
Measure waveform at R160,R161,R162,R163 because it's more easy to check.
Can you see the normal signal?
YES
Check the input (Pin 7,17,18,19) of NTP3100((IC600).
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
YES
Check the connector & Speaker
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Only for training and service purposes
NO
This board has big problem because Main chip(BCM3553) have some troubles.
After checking thoroughly all path once again, You should decide to replace BCM3553 or not.
NO
After checking audio signal line, you should decide to replace item or not.
NO
After checking the Power & I2C & Reset of this chip, you should decide to replace this or not.
NO
After checking audio signal line, you should decide to replace item or not.
Audio(Out)
LGE Internal Use Only
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