Nokia RH-41 Series Troubleshooting Instructions page 30

RH-41
Troubleshooting Instructions
TDMA800
The transmitter chain is exactly the same as the AMPS mode, except for the IPA current.
TDMA 1900 (dual band)
TDMA 1900 mode and DAMPS mode have a common RF modulator and thus it is impor-
tant that the DAMPS mode have no faults.
TDMA 1900, PL2, CH1000
Is TDMA800 mode
Check LO signal
(2079.78MHz)@T775
(363.6MHz)@N750
Check supply voltage
Check TX IF input
(181.80MHz)@Z960
IF: -20dBm+3/-6dB
(1879.98MHz) output
power @T960 input
RF: 0dBm+/-6dB
Check Z961 input and
Page 30
NOK
OK?
OK
NOK
and TX VHF
OK
-VR2
-VBATTRF
NOK
-VR6
-IPA2
-TXP2
OK
power
NOK
OK
Check TX RF
NOK
OK
output power
NOK
IL:-3dB
OK
Nokia Corporation
CCS Technical Documentation
Start AMPS
troubleshooting
Start synthesizer
troubleshooting
Check UEM and UPP
(baseband)
Change Taco or Z960
Taco
Change Taco
Taco
Change Z961
Confidential Issue 2 09/2003