Nokia 6620 서비스 매뉴얼
NHL-12
Nokia Customer Care
6- Baseband
74
COMPANY CONFIDENTIAL
Issue 3 05/2005
Copyright © 2005 Nokia. All Rights Reserved.
Figure 26:ADC Reading window
NOTE: IF Vbatt Scaled and Divided unit results are different default calibration values are used.
In this case perform EM-calibration to get full performance of the phone.
In this case perform EM-calibration to get full performance of the phone.
Backup battery
If there is a backup battery fault, one of the symptoms is Real Time Clock losing the correct
time during short main battery removal.
time during short main battery removal.
The same symptom may also occur when the backup battery is empty. About 5 hours is needed
to fully charge the backup battery.
to fully charge the backup battery.
NOTE: Backup battery is only charged at the same time as the main battery or when the device
is in either LOCAL or TEST mode.
is in either LOCAL or TEST mode.
Table 27: Maximum reading tolerances
Reading
Check point
Tolerance
Vbatt SCAL
4.2V
± 25mV
Vchar
8.4V
± 40mV
Ichar
500mA
± 20mA
BSI
75k
± 1.3kohm
Btemp
273K(47k)
± 5K