LG KG271 - Page 80

4. TROUBLE SHOOTING
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Connector Headset and
Turn on Radio and
tuned channel
Check LDO
Power
U304.PIN1 = High
U304.PIN4=2.8V
Check
Control Signal
R336/R337/338
Check I2C signal and 32K clock
Check
Audio Output
Of Transceiver
R329/R330
C332/C333
Check
Audio Output
Of Amplifier
R327/R331
Change PCB
Change U304
Change PCB
Change U302
Change U303
NO
NG
NG
NG
YES
OK
OK
OK
Checking Flow