Step 1. General Checking; Fig 19 General Checking - Nokia RH-13 Series Troubleshooting Manual

CCS Technical Documentation

Step 1. General checking

Check signal level
at RX band filter
Z801 input
OK
Check signal level
at mix1_A input
OK
Check signal level
at IF filter Z804
input (133.2 MHz)
OK
Check signal level
at IF filter Z804
output (133.2
MHz)
OK
Check signal level
at RX I/Q J808,
J809, J818, J819
OK
Check UEM and
start baseband
troubleshooting
The fastest way to get overview of RX status is to measure RSSI (Received Signal
Strength Indicator) level. This can be done by using signal generator and Phoenix. Note
that this is useful only if the phone has been calibrated when it was OK and the mal-
function have occured after tunings.
1 Set signal generator frequency to 881.46771 MHz and level to -80 dBm.
2 Select RSSI measurement UI in Phoenix (Maintenance => GSM RSSI Meas).
3 Set Band to GSM850 and Rx/Tx channel to 189
Issue 1 11/02
Figure 19: General checking.
Not OK
Not OK
Not OK
Measure VR4 from L815
and L814 pads
Not OK
Check components
L815,
L814 etc.
Not OK
Replace IF filter
Z804
Not OK
Start synthesizer
troubleshooting
ãNokia Corporation
Check V R 4 supply
and components if
these ok => replace
Safari N801
Replace RX band
filter Z801
OK
OK
RH-13
Troubleshooting
Start synthesizer
troubleshooting
OK
Replace Safari N801
Replace Safari
N801
Page 37