NSW-5
Disassembly and Troubleshooting Instructions
PAMS Technical Documentation
Page 42
Issue 1 10/00
Nokia Mobile Phones Ltd.
TDMA1900 TX
TDMA1900 mode and DAMPS mode have common IF section and anten-
na circuit and thus it is important that DAMPS mode have no faults.
Is TDMA800 mode
?
Start TDMA800
troubleshooting
Are LO signals
Start synth
troubleshooting
Check current
consumption
I: > 350mA(rms)
Check antenna circuit
and Duplex–filter
Chort circuit in PA?
N
Y
N
Y
Y
Note!
Check VHF and UHF locals including
LO–buffer, measuring point for UHF is
N980 pin5.
Make press down test
for PA. Inreasing
current consumption ?
Resolder or change
PA.
Note!
The PA ground slug
might be poorly soldered
or there is delamination
on chip.
Y
N
N
OK
OK
?
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