Phone Is Totally Dead - Nokia NSW-6 Series Disassembly & Troubleshooting Instructions

PAMS Technical Documentation

Phone is totally dead

This means that phone doesn't take current at all when the power switch
is pressed or when the watchdog disable pin (X101 pin 11 or J150) is
grounded. Used battery voltage must be higher than 3.0 V. Otherwise the
hardware of CCONT (N150) prevents totally switching power on. Here the
VBat is set to 3.6V
Phone is
totally dead
YES
VBat=3.6V at R153
YES
Voltage at J150 of CCONT
(N150) = 3.6V
YES
C166 (VBB) = 2.8V
C158 (VR1) = 2.8V
when PWR switch pressed or
watchdog disable pin
grounded
YES
See section: Power does not
stay on
Issue 1 12/99
Failure in VBat line,
NO
check X100
NO
Faulty circuit N150
CCONT(N150) J150 = 0V
NO
when PWR switch pressed
or watchdog disable pin
(X101 pin 11) grounded
YES
Faulty circuit N160
E Nokia Mobile Phones Ltd.
Disassembly & Troubleshooting
NO
Check R160, PWR switch,
connector X300
Check watchdog disable
line X101
NSW-6
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