Nokia NPM-2NX Troubleshooting Manual page 47

CCS Technical Documentation
AMPS, PL2, CH383
Visual check of TX
block
- PA and up converter
-TX SAW
- Duplex filter
- Passive components
Check LO-signal
(1015.53MHz)
@L979&L980
and TX VHF (358.08
MHz)@N811
Check supply voltages:
VR2,VBATTRF,
VR5, IPA1,BANDSEL,
TX_ENABLE
TX_GAIN_CONTROL
Check TXi/q signals
Test points J810...J811
Check TX IF power
(179.04 MHz) @
C931&C932
Input: -17 dBm
+3 /-6 dB
OK
Check TX RF (836.49
MHz) output power @
U/C output
RF: -5 dBm +/- 6dB
OK
Issue 1 07/02
OK
NOK
troubleshooting
OK
NOK
Check UEM and UPP
OK
NOK
OK
NOK
Change SAFARI
NOK
1) Check C904
ãNokia Corporation
Start synth
(Baseband)
Check UEM
(Baseband)
N801
2) Change
U/C N902
NPM-2NX
Troubleshooting
Page 47