LG T5100 Service Manual page 56

- Enter into Engineering mode
- Go to menu "Baseband
Trouble Shooting Procedure
- Check vibrator signal
- Check soldering of components
- Check Board-to-board connector
- Check vibrator
CN200
Vibrator Trouble
START
CN200 is
soldered well ?
Yes
Rectangular wave(0.7V)
appear s at pin3 of U204?
Yes
Signal path is OK?
Yes
Vibrator is out of order.
Change the Vibrator.
Alert Vibrator"
L200
Figure 36. Vibrator Path
Enter into Engineering Mode
and select Vibrator
No
Resolder the CN200
Change the U204.
No
U204 is broken.
No
Resolder the R218,
R219,U204,L200
- 57 -
3. BASEBAND PART TROUBLE SHOOTING
R219
U204
R218