Transmitter Troubleshooting; General Instructions For Tx Troubleshooting - Nokia RH-41 Series Troubleshooting Instructions

RH-41
Troubleshooting Instructions
Y
Check RF level at
MIX1_B input
Y
Check RF level at RX
IF filter input at
135.54MHz
Y
Continue
troubleshooting like
LB

Transmitter Troubleshooting

General instructions for TX troubleshooting

Always use an RF cable connected from an external RF connector to the analyzer via (rf-
power) attennuator. This is important to protect the analyzer against excessive RF power
and not to allow leakage of undesired RF power into the cellular frequencies.
1 Start the Phoenix software and select the TX mode under Testing (AMPS,
DAMPS).
2 It is useful to select the mid channel (383 for AMPS/DAMPS) and the power
level 2.
Note: After any component change, tune the phone with the Phoenix autotune SW .
Page 26
Change RX1900 band
N
Check RF level at
J751 and J752 at
N
2095.56MHz
Change Taco (N801)
Figure 11: Fault tree: TDMA 1900 troubleshooting
Nokia Corporation
CCS Technical Documentation
filter
N
Y
Taco
Confidential
Start synthesizer
troubleshooting
Note! Check all
discrete
components and
voltages around
Taco.
Issue 2 09/2003