Nokia NEM-4 Series Troubleshooting Instructions page 27

CCS Technical Documentation
Vbatt offset and Gain:
Inspect Vbatt lines and component in it.
Vchar over limits:
Inspect components which are connected Vchar line: V383, F381 and L381
Ichar over limits:
Inspect components which are connected at Vchar line. If those are OK, First change
current sense resistor (R191), if calibration is not still successful change UEM.
Calibration can be checked using ADC-readings. Known voltages, currents and resis-
tances are fed and read by ADC-readings, read values and known values can be com-
pared.
ADC-reading
Divided and scaled battery voltage, Charger voltage, Charger current, BSI and Btemp val-
ues can be read by this tool. Read values few times before you can be sure that results
are accurate.
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 phone.
Issue 1 09/2003
Company Confidential
Copyright  2003 Nokia Corporation
Company Confidential
NEM-4
BB Troubleshooting
Page 6(a)-25