Nokia NPM-2NX Troubleshooting Manual page 30

NPM-2NX
Troubleshooting
Step 1. General checking
Check signal level
at RX band filter
Z801 input
Check signal level
at mix1_A input, L809
Check signal level
at IF filter Z803
input (134.04
MHz), R801
Check signal level at
IF filter Z803 output
(134.04 MHz), R802
OK
Check signal level at
RX I/Q J808, J809,
J818, J819
OK
Check UEM and
start baseband
troubleshooting
Page 30
Not OK
OK
Not OK
OK
Not OK Measure VR4 from
L812 and
L811pads
OK
Check components
L811 etc.
Not OK Replace IF filter
Z803
Start synthesizer
Not OK
Troubleshooting
(RX VF`HF)
ãNokia Corporation
CCS Technical Documentation
Check VR4 supply
and components if
these ok => replace
Safari N801
Replace RX band
filter Z801
OK
Not OK
L812,
OK
Start synthesizer
Troubleshooting
(UHF VCO)
OK
Replace Safari N801
Replace Safari N801
Issue 1 07/02