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Only for training and service purposes
10. Pillow Speaker in Trouble Shooting guide
Check input signal format.
Is it supported?
Y
Check AC cable for damage
For damage or open conductor
Y
Check AMP(IC8602)/DC-DC(IC9502) IC Power
12V
Y
Check the input of LG1311 (IC105).
Measure waveform at C300 or C8622 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 AMP or DC-DC
N
Check Audio AMP output
L8607
Replace L8607
N
Y
N
Содержание 42LY770M
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