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LG Electronics. Inc. All rights reserved.
Only for training and service purposes
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
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.
Replace JK4600
N
Check Audio AMP output
L5602,L5603,L5604,L5605
Replace L5602,L5603,L5604,L5605
N
Y
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
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.
Replace JK3201/JK3202/JK3203
N
Check Audio AMP output
L5602,L5603,L5604,L5605
Replace
L5602,L5603,L5604,L5605
N
Y
Summary of Contents for 47LY960H
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