Mic Function Check - LG OM5541 Service Manual

ELECTRICAL TROUBLESHOOTIHG GUIDE

9. MIC FUNCTION CHECK

MIC FUNCTION
CHECK
YES
Check
IC420(S4308) pin3
input.
YES
Check
IC420(S4308) pin4
data output.
YES
Check
IC203(AK5358) pin1, 2
data input.
YES
IC501(MLC3730) data output.
YES
OK
NO
Check JK421, JK422.
NO
Check IC420
pin6: +5 V
YES
Check
NO
IC203 pin5: +5 V
pin5: +3.3 V
YES
3-22
Check CN501 pin7, 8: +5.6 V.
NO
NO
Check IC423
pin1: +5 V.
YES
Replace IC201.
NO
Check IC203
NO
PIN9: SCLK PIN10: MLCK
PIN11: LRCK
PIN12: ADC_DATA
YES