Nokia NME-2A Series - PWR Button Fault

P.A.M.S.
Technical Documentation
NME–2A
Troubleshooting Instructions
Page 10
Original 08/97
PWR Button Fault
Nothing happends
N100/PSL pins
YES
NO
5,20 +6.2 V When either
YES
when PWR button
is pressed
IGNS is high
XPWRON is low or
Check N101 pin 2
+6.2 V if not OK
N100/PSL
pin 9/XPWROFF pulses
from 0 to +5 V after
power on
Check VL1, VL2, VA2, VREF
if OK then change N100
N101/pin 4
VBATT voltage
V110 gate
is 0V
Check V101
if OK change V110
D250/pin 5,42 VL1
+5 V When XPWRON
Check V106, L100
Change N100
is push high
Check D250,
D300
NO
NO
YES
YES
NO
NO
YES
Check
V102, V103,
V104, R109,
R110, R111,
R113, R133,
R134, C100
change N101
C112, C124
R143, V107
R100, R124