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8. AV Audio in Trouble Shooting guide
Check input signal format.
Is it supported?
Y
Check AC cable for damage
For damage or open conductor
Y
Check JK4600
Can you see the normal waveform?
Y
Check the input of LG1311(IC101).
Measure waveform at C314, C315 because it's more easy to check.
Can you see the normal waveform?
Y
Check Audio AMP output
L5602,L5603,L5604,L5605
Y
This board has big problem because Main chip (LG1311, IC101) have some troubles.
After checking thoroughly all path once again, You should decide to replace Main IC or not.
9. HDMI Audio in Trouble Shooting guide
Check input signal format.
Is it supported?
Y
Check AC cable for damage
For damage or open conductor
Y
Check JK3201/JK3202/JK3203
Can you see the normal waveform?
Y
Check Audio AMP output
L5602,L5603,L5604,L5605
Y
This board has big problem because Main chip (LG1311, IC101) have some troubles.
After checking thoroughly all path once again, You should decide to replace Main IC or not.
Copyright ©
LG Electronics. Inc. All rights reserved.
Only for training and service purposes
N
Replace JK4600
N
Replace L5602,L5603,L5604,L5605
N
Replace JK3201/JK3202/JK3203
N
Replace
L5602,L5603,L5604,L5605
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LGE Internal Use Only
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