LG -T300 Service Manual page 78

CHECKING FLOW
SETTING : Enter the engineering mode, and set vibrator on at vibration of BB test menu
START
Check the soldering
of vibrator ?
YES
Check the TP307.
Is PWM Signal OK?
Is the voltage at VB301
(+) high?
Replace vibrator
Vibrator
Working well !
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Only for training and service purposes
NO
NO
YES
NO
YES
YES
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4. TROUBLE SHOOTING
4. TROUBLE SHOOTING
Resolder the Pad.
Replace U102
Replace U302
LGE Internal Use Only