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Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
4. TROUBLE SHOOTING
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
NO
Is the voltage at TP2 equal to VBAT?
YES
Is the voltage at TP3
high (VBAT) ?
YES
Check the soldering
of vibrator ?
YES
Replace vibrator
YES
Vibrator
Working well !
Check the U103 Output & soldering
NO
Check the soldering
Of Q300
If overall current is abnormal, replace Main Board
NO
Check the soldering
of R314, D300
Resolder or Replace vibrator
NO
CHECKING FLOW
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