User Guide

CCS Technical Documentation 7 - Troubleshooting Instructions
RH-26
Issue 1 02/04 ©Nokia Corporation Page 41
Vibra
Vibra motor M100 is soldered directly to the PWB and it is controlled by a PWM signal
(UEM UIDRV (1) line). The other vibra pad is connected straight to VBat. If the vibra does
not work, the possible fault is located in the vibra motor itself or in the UEM circuitry.
Figure 23: Location of vibra motor
Real time clock battery
Regulator for charging back-up battery G300 is inside the UEM. Charging starts when
the main battery is connected and power is on.
The battery type is cell capacitor and it is soldered directly to the PWB. Typical voltage
for a fully charged battery is 3.2V, but backup circuitry can operate between 2-3.3V. If
RTC does not work, the possible fault is in the RTC battery itself or in the UEM circuitry.
Figure 24: Location of RTC battery
Flip position recognition
The flip position, open or close, is detected by the hall sensor N301. The hall sensor
detects the magnet, which is integrated into the flip mechanics.