NSW-5
Disassembly and Troubleshooting Instructions
PAMS Technical Documentation
Page 23
Issue 1 10/00
Nokia Mobile Phones Ltd.
6. Charging Failure
YES
Nothing happens when charger is connected
Voltage level at C171 is higher than 0.17 V
when charger is connected
NO
Check
X100, R155, R169,
F150, L150
YES
Check N150
Display Information: Not charging
YES
Voltage level at C173 is about 0.8 V when
power is connected BSI resistor value
should be 39 k
NO
Check
R152, R163
YES
Voltage level at C174 is about 0.5 V when
power is connected BTEMP resistor value
should be 47 k
NO
Check
R163, R161
YES
32 Hz square wave frequency at R150 if ACP–9U
charger is connected, 1 Hz square wave frequency if
ACP–7U is connected
NO
Check
N150
Faulty
N151
YES
Voltage levels at R153 are same as VBAT (C180)
NO
Check
R153, N151
YES
Voltage levels at R153 rises when
charger is connected
NO
Figure 5. Troubleshooting diagram for charging failure