LG CM9530 - Page 50

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ELECTRICAL TROUBLESHOOTING GUIDE
USB play
Check IC501.
Replace IC352.
IC501
Pin16, 18 USB_HUB_D output
signal OK?
NO
NO
IC352
USB power +5 VU
OK?
YES
A
A
When insert
USB, IC504 Pin1, 2, 3, 4 USB_D
signal OK?
NO
YES
YES
YES
YES
YES
AUX
Check audio cable.
Replace IC202.
Check IC501.
NO
NO
NO
IC202
Pin23,24 AUX input signal
OK?
IC202
Pin41 ADC data output signal
OK?
IC202
Pin42,43,44 I2S input signal
OK?