LG CJS98F - No Audio Check

3-30
ELECTRICAL TROUBLESHOOTING GUIDE
USB play
Replace IC303.
NO
IC303
USB power USB_5 V
OK?
YES
A
A
When insert USB,
IC501 pin U7, U8, A7, A8
USB_D signal OK?
NO
YES
YES
YES
YES
AUX
Check audio cable.
Replace IC200.
Check IC501.
NO
NO
NO
IC200
pin 3, 4 AUX input signal
OK?
IC200
pin18 ADC_data output signal
OK?
IC200
pin15, 16, 17 I2S input signal
OK?
NO AUDIO CHECK