Nokia NPM-2NX Troubleshooting Manual page 50

NPM-2NX
Troubleshooting
TDMA1900, PL2, CH1000
GSM1900, PL0, CH661
Is TDMA800 mode
OK?
Check LO-signal
(TDMA 2094.06 GSM
2093.2MHz)@L979&L98
0 and TX VHF
(TDMA 428.16
GSM 426.4 MHz)@N811
OK
Check supply voltages:
VR2,VBATTRF,
VR6, IPA2,BANDSEL,
TX_ENABLE
TX_GAIN_CONTROL
OK
Check TX IF input
power (TDMA 214.08
GSM 213.2 MHz) @
C931&C932
IF: -12 dBm +6/-6 dB
OK
Check TX RF (TDMA
1879.98 GSM 1880
MHz) U/C output power
@ Z961 input
TDMA +4 dBm +/- 6dB
GSM +8 dBm +/- 6dB
OK
Check Z961 input and
output power
IL: -3dB
OK
Page 50
NOK
troubleshooting
OK
NOK
troubleshooting
NOK
Check UEM and UPP
NOK
Change SAFARI N801
NOK 1) Check Z960 input
and output power
2) Change U/C N902
NOK
Change Z961
ãNokia Corporation
CCS Technical Documentation
Start AMPS
Start synth
(Baseband)
or Z901
IL: -3dB
Issue 1 07/02