Tuner / Aux Function Check; Tuner Function Check - LG CJS45F Service Manual

ELECTRICAL TROUBLESHOOTING GUIDE

7. TUNER / AUX FUNCTION CHECK

FUNCTION CHECK
YES
Check IC202
(PCM1865) Pin27, 28,
29, 30 input.
YES
Check IC202
(PCM1865) Pin18, 19
output data.
YES
Check
IC500(MLC3730)
input data.
YES
IC500(MLC3730) output data.
YES
OK

8. TUNER FUNCTION CHECK

TUNER FUNCTION CHECK
Check tuner module(TU200)
operation.
Check IC500 Pin P7, P8, P10, P11.
Refer to function check.
NO
Check JK200,TU200.
NO
IC202 Pin8: ADC +3.3 V
Pin13,14,25: DVCC
Check IC202
NO
Pin8: ADC +3.3 V,
Pin13, 14, 25: DVCC +3.3 V.
YES
YES
YES
Check
NO
+3.3 V.
YES
NO
NO
Check tuner module voltage
NO
Check tuner module data.
3-24
Check CN102 Pin13,14: 12 VA.
Check IC202
Pin18,19:ADC, MIC_DATA SDOUT,
Pin17: BCK, Pin16: LRCK,
Pin15: MCLK.
YES
Replace IC201.
(Pin4: +3.3 V).