LG GT540 - Vibrator

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4. Trouble Shooting
4.17 VIBRATOR
Linear Motor signal’s path are MSM7227 Æ Motor Driver IC(U501) Æ SUB FPCB.
U501 uses the PWM pulse.
Rebot
Work well?
Yes
No
Output of U501 OK? (TP1, TP2)
Yes
No
TP3 is 3.3V?
TP4 is high?
START
Check SW
END
Check SUB FPCB
Check an U501 SMT Status by X-ray,
Exchang it
Yes
No