LG KG270 Service Manual page 58

Checking Flow
R306=2.8V
R308=0.7V
Q300.PIN3=0V
R305=0V
START
Enter the engineering mode,
and set vibrator on.
Check Voltage Level of
R306/R308
OK
Check Voltage Level of
Q300.PIN3 and R305
OK
Replace Vibrator
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4. TROUBLE SHOOTING
NG
Change PCB
NG
Change Q300