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NSE–3
Disassembly & Troubleshooting Instructions
Charger failure
32 Hz square wave frequency at pin 7 of CHAPS (N101)
Page 20
Nothing happens when charger is connected
YES
Voltage level at pin 60 of CCONT (N100)
is higher than 0.4 V when charger is con-
nected
YES
Check N100
Display Information: Not charging
YES
Voltage level at pin 62 of CCONT (N100)
is about 0.8 V when power is connected
BSI resistor value should be 39 k
YES
Voltage level at pin 63 of CCONT (N100)
is about 0.5 V when power is connected
BTEMP resistor value should be 47 k
YES
YES
Voltage levels at pins 5 and 12 of CHAPS (N101)
are same as VB
YES
Voltage levels at pins 5 and 12 of CHAPS (N101)
rises when charger is connected
Technical Documentation
Check
NO
X100, F100, L104
R104, R103
Check
NO
X101, R120, R122
Check
NO
X101, R120, R122
NO
Check
N100
NO
Check
R131, N101
Check
NO
N101
Original, 11/97
PAMS
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