Nokia 9000i Service Manual page 274

RAE/RAK–1N
Faultfinding/Disassembly
5.1 Start the PMI Test
Start the PMI test by choosing the PMI test in the service software. Give a
reasonable timeout value within which the interrupt is likely to occur.
5.2 Toggle Cover
In order to generate an interrupt, toggle the cover open or close.
5.3 PMI Test Successful?
If the service software reports the PMI test to been successful, proceed to
5.4 otherwise go to 5.3.1
5.3.1 LIDOPEN Connected to CMT?
In order to isolate the fault to the PDA module check if the LIDOPEN
signal is connected to the CMT module. If the signal is connected go to
5.3.1.1 otherwise continue to 5.3.2
5.3.1.1 Disconnect LIDOPEN from the CMT Module
In order to isolate the fault to the PDA module, disconnect the CMT
module. Proceed back to 7.1.
5.3.2 CPU pin 127 Toggling?
Check if the CPU pin 127 toggles according to the lid switch. The toggling
can be checked by moving a magnet on the S170, or just by short
circuiting it. If the pin does not toggle, then proceed to 5.3.3 otherwise go
to 5.3.2.1
5.3.2.1 CPU Fault
If the CPU pin 127 (PMI0) or pin 128 (PMI1) is toggling while the PMI test
is armed, and the PCLocals reports the test to have been unsuccessful,
then it is likely that the CPU is not working correctly.
5.3.3 Check S170, R149, R150, R151, C139
If the signal is not toggling, change the faulty component.
5.4 Cover Opened and Closed?
Repeat the test switching the cover to the opposite position, i.e opened –>
close and closed –> open. Goto 5.5
5.5 Start the PMI Test
Start the PMI test by choosing the PMI test in the service software. Give a
reasonable time–out value within which the interrupt is likely to occur.
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Original, 05/97