LG CU920 - Headset Microphone Path Troubleshooting

- 133 -
4. TROUBLE SHOOTING
4.22 Vibrator
Vibrator is operate when PMIC’s VIB_DRV_N going down to below 0.8v.
LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Start
+VPWR (L800) is
above 3.28V
?
Operate th e Vibrator
check battery
NO
NO
YES
Change vibra tor
MOTOR_PWR-
(L801)
is conn ected
ground ?
Change the
PMIC/Mainbo ard
YES
L801 L800
[ CU920 MAIN Bottom
(
near Vibrator connector
)
]
MAIN Bottom (near Vibrator connector)