Audio Function Mode - LG XA66 Service Manual

ELECTRICAL TROUBLESHOOTING GUIDE

4. AUDIO FUNCTION MODE

Portable
Check the input signal
of U503 pin7, 8
YES
Check the output signal of U503 pin19, 23
CD / USB
Check the input signal
of U503 pin3, 4
YES
Check the output signal of U503 pin19, 23
Tuner
Check the input signal
of U503 pin1, 2
YES
Check the output signal of U503 pin19, 23
NO
Check the input signal of CON541
NO
Check the output signal of U502 pin55, 57
and refer to CD trobleshooting
NO
Check the output signal of TU101 pin1, 2
3-5