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CCS Technical Documentation
AMPS
Fault finding chart
Apply signal to ext .
antenna connector
f= 881.4 MHz ch 380)
mod.= 1004
dev .= 8 kHz
level= -116 dBm
Connect audio box
from the bottom
connector to audio
Analyzer
SINAD < 12 dB
Apply signal to ext .
antenna connector
f=881.4091125MHz
( ch 380)
unmodulate
level= -50 dBm
Check signal level
at diplexer Z908
input
Check signal level
at duplex filter
Z906 input
Check signal level
at LNA_a input
coil pad (L802)
Issue 1 07/02
SINAD > 12 dB
Not OK
OK
Not OK
OK
Not OK
OK
ãNokia Corporation
Troubleshooting
AMPS RX is OK
Replace external
antenna connector
X900
Replace diplexer
Z908
If coil L802 is ok
replace duplex
filter Z906
NPM-2NX
Page 29
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Table of Contents
Troubleshooting
