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Customer Care Europe, Middle East & Africa
SCCE Training Group
Low standby/operation mode time
First of all check current consumption in different operation modes:
Function mode
Off state
Sleep mode
Call mode GSM 900
Call mode GSM 1800
* : lowest TX-power level, lights off
**: highest TX-power level, lights on
Off state current fail
The first you should do in case of this fault is to lift L513 with a soldering iron, then check current consumption again.
If current is still too high, usually the power amplifier N502 is defect but it is also possible that one of the capacitors
C563/564 or C570-572 is defect – lift them one by one to find the fault.
If current is ok after removing L513, resolder this part and lift L201. If current is too high now, check capacitors C233,
C527, C575 and C597.
If current consumption is ok after lifting L201, you have to check capacitors in VB-line (eg C200/201, C226-228, C247...) or
change N200/201/400, which all can be responsible for the fault. But it is most likely that CCONT N201 is defect.
Sleep mode current fail
Check resistance of output voltage lines of CCONT N201 to ground.
Resistance of lines should not decrease 40 k? except VSYN1 (~ 4.7 k? ). If resistance of any line is not ok, check/change parts
of this line.
If resistance of all lines is ok, change CCONT N201.
If both offstate current and sleep mode current are ok but the standby-/operation mode time is not acceptable, check the
charging circuit and run energy management calibration to ensure that the fault does not result of an insufficient charged
battery.
If also the charging circuit is ok but fault persists, it can be necessary to calibrate RX/TX values of the phone.
If calibration is not possible continue with section "No Service".
© NMP 2002
CONFIDENTIAL
NHM—2/5/6
3410
Date 20.11.2002
Minimum current in mA
0.1
0.6
130*
100*
Checked by:
Customer Care E&A
Repairhints
Version 4.0 Approved
Maximum current in mA
0.6
4
550**
530**
Approved by:
SCCE Training Group
24 (44)
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