LG 65UX970H Service Manual page 30
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Also See for 65UX970H:
- Owner's manual (74 pages) ,
- Easy setup manual (8 pages) ,
- Owner's manual (25 pages)
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5. AV/Component Trouble Shooting guide
Check input signal is supported format
Y
Check AC cable for damage or open conductor
Y
Check JK4600
Can you see the normal waveform?
Y
Check the input of Main IC(IC101).
Measure waveform at C629, C617
because it's more easy to check.
Can you see the normal waveform?
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Only for training and service purposes
N
JK4600 may have problem.
Replace this Jack.
This board has big problem
Y
because Main chip (LM15U) have some troubles.
After checking thoroughly all path once again,
You should decide to replace LM15U or not.
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