Nokia 9000i, Service Manual

Page: 275 / 434

After Sales
Technical Documentation
RAE/RAK–1N
Faultfinding/Disassembly
Page 8 – 33
Original, 05/97
5.6 Toggle Phone ON/OFF
In order to generate an interrupt, toggle the CMT module ON or OFF.
NOTE: the CMT switches OFF several seconds after the power switch has been
pressed!
5.7 PMI Test Successful?
If the service software reports the PMI test to been successful, proceed to
5.8 otherwise go to 5.7.1
5.7.1 CPU pin 128 Toggling?
Check if the CPU pin 128 toggles according to the power ON/OFF switch
of the CMT. If the pin does not toggle, then proceed to 5.7.2 otherwise go
to 5.3.2.1
5.7.2 Check R130, R146
If the signal is not toggling, check the resistors.
5.7.3 Discrete Components and the Connections OK?
If the resistors and the connections to the CMT module are OK, proceed
to 5.7.3.1 otherwise go to 5.7.3.2
5.7.3.1 Check CMT
If the resistors and the connections to the CMT module are OK, then the
fault is in the CMT module.
5.7.3.2 Change the Corresponding Component
Change the bad resistor.
5.8 Phone Powered ON and OFF?
Do the test using both transitions phone OFF –> switch the phone ON,
phone ON –> switch the phone OFF. If both transitions were successful,
the PMI test can be considered to have been successful.