LG KP260 Service Manual page 60

CIRCUIT
SETTING : Enter the engineering mode, and set vibrator on at vibration of BB test menu
START
Is the voltage at TP1 high (0.66V)?
YES
Is the voltage at TP2 equal to VBAT?
YES
Is the voltage at TP3
high (VBAT) ?
YES
Check the soldering
of vibrator ?
Replace vibrator
Vibrator
Working well !
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Only for training and service purposes
NO
NO
If overall current is abnormal, replace Main Board
NO
NO
YES
YES
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4. TROUBLE SHOOTING
Check the U103 Output & soldering
Check the soldering
Of Q300
Check the soldering
of 311, L301, Q200
Resolder or Replace vibrator
LGE Internal Use Only