Nokia NKC-1X Series Troubleshooting Instructions page 26

NKC-1X
Troubleshooting Instructions
AMPS, PL2, CH383
Visual check of TX
block
-PA
- PA and up converter
-TX SAW
- Duplex filter
- Passive components
Start syntheziser
Check LO-signal
troubleshooting
(1017.03 MHz)@up
converter
and TX VHF (361.08
MHz)@N750
OK
Check supply voltage
- VR2
- VBATTRF
- VR5
- IPA1
- TXP1
OK
Check TXi/q signals
Test points J901...J904
OK
Check Z960 input and
Check TX IF input
output power
power (180.54 MHz) @
out:-20dBm+3/-6dB
up converter
IL:2dB
IF: -20 dBm +3 /-6 dB
OK
Check TX RF (836.49
MHz) output power and
from balun T961
@ up converter
input RF:0dBm+/-6dB
RF: 0 dBm +/- 6dB
OK
Page 26
Figure 12: Fault tree. Transmitter troubleshooting
OK
NOK
troubleshooting
NOK
Check UEM and UPP
(Baseband)
Check UEM
NOK
(Baseband)
NOK
Change SAFARI
or Z960
NOK
Change up converter
Nokia Corporation
CCS Technical Documentation
Start synth
TACO
TACO
Issue 1 02/03