Nokia NPC-1 Series Troubleshooting Instructions page 28

NPC-1
Troubleshooting Instructions
Check TX SAW
input and output
power
IL: -3 dB
OK
Is Itot 700...800 mA?
Check PA output power
and gain.
Output power: ~28
dBm
Gain: ~30 dB
Check PWRDET N930
insertion loss
IL< 0.3 dB
OK
Check duplexer Z906 ,
diplexer Z907 and RF
connector X900
insertion loss
Dupl IL ~2.2 dB
Dipl ~0.35 dB
RF conn ~0.1 dB
Start Power control
troubleshooting
TDMA800
The transmitter chain is exactly the same as the AMPS-mode, except for the IPA current,
and thus it is important that the AMPS have no faults.
Page 28
NOK
Change TX SAW filter
NOK
Change PA N901
OK
NOK
Change PWRDET
NOK
Change Z906 or Z907
or RF connector
OK
ãNokia Corporation
PAMS Technical Documentation
Z905
N930
Issue 1 10/01