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LGE Internal Use Only
Copyright ©
LG Electronics. Inc. All rights reserved.
Only for training and service purposes
5. AV/Component Trouble Shooting guide
6. HDMI Video Trouble Shooting guide
Y
Check input signal is supported format
Check JK3400
Can you see the normal waveform?
Check AC cable for damage or open
conductor
Check the input of Main IC(IC101).
Measure waveform at C3403
because it’s more easy to check.
Can you see the normal waveform?
JK3400 may have problem.
Replace this Jack.
This board has big problem because
Main chip (M14+) have some troubles.
After checking thoroughly all path once
again, You should decide to replace
M14+ or not.
Y
Y
N
N
Y
Check input signal format.
Is it supported?
Check JK3200/JK3202
Can you see the normal waveform?
Check AC cable for damage
For damage or open conductor
This board has big problem because
Main chip (M14+) have some troubles.
After checking thoroughly all path once
again, You should decide to replace
M14+ or not.
JK3200/JK3202 may have problem.
Replace this Jack.
Y
Y
N
Summary of Contents for 32LX770M
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