Motorola Moto X Pure Edition Troubleshooting Manuals page 64

Vibrator Circuit
The rotary vibrator is used for both haptic and vibration alert function.
If the Vibrator is not functioning ...
- Inspect physical placement of the rotary vibrator and its related components on main PCB board.
(See schematic on the previous slide)
- Check vibrator driver IC VDD at C4602 or C4603. The VDD voltage level should be 5V when the
phone powered on. (This power should be always turned on)
- Check vibrator part DC armature resistance on test points VIBP and VIBN (see image below) to verify
the solder connection between vibrator and PCB and PCB traces. The DC armature resistance
should be about 11 ~ 19 ohms.
- The voltage difference between VIBP and VIBN when the vibrator is operating is about
2.5 V~4.5 V.
MOTOROLA CONFIDENTIAL
Moto X Pure Edition/Moto X Style
Baseband TROUBLESHOOTING GUIDES