User Guide

NPE-3
Baseband Trouble shooting PAMS Technical Documentation
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YES
Nothing happens when charger is connected
R103 towards C101 (VCHAR, N102) > 0.4 V
when charger is connected
NO
Check
X001, F101, L104
R102, R103
YES
N102 is faulty
Display Information: “Not charging”
YES
R121 towards C127 (BSI, N102)
≈
0.8 V
when power is connected.
BSI resistor value should be 39K (BLS-2 batt)
NO
Check
X101, R120, R122
YES
R123 towards C126 (BTEMP, N102)
≈
0.5 V
when power is connected.
BTEMP resistor value should be47 K
NO
Check
X101, R120, R122
YES
Voltage at R105 towards CHAPS (N100) and at R106
towards C105 are same as VB (VBATT)
NO
Check
R105, 106, N100
Check
N100
Check PCB
YES
Voltage at R105 towards CHAPS (N100) and at R106
rises slowly when charger is connected
NO
Check
N100
YES
32Hz (fast charger) or 1Hz (slow charger) at R171
towards CHAPS (PWM, N100) or at pin 4 + 5 (X001)
NO
YES