General instructions for RX troubleshooting
Steps
1. Connect a test jig to a computer with a DAU-9S cable or to a FPS-10 flash prommer with a modular cable
(XCS-4).
Make sure that you have a PKD-1 dongle connected to the computer's parallel port.
2. Connect CU-4 with 12 V supply. The DC supply voltage is set to 3.7 V by default (in Phoenix).
3. Connect an RF cable between the RF connector of the module test jig (MJ-62) and measurement equipment
or alternatively use a 50 Ω (at least 2 W) dummy load in the module test jig RF connector, otherwise the
RF part may be damaged.
Note:
Make sure that all connections are made to the correct RF connector.
4. Set Rx on.
i
Set the phone module to the test jig and start
Phoenix service software
.
ii Initialize connection to the phone. (With the FPS-10 prommer use FPS10_USB or FPS10_TCP drivers,
depending on connection type. When using DAU-9S select FBUS).
iii From the File menu, choose product: File -> Choose Product -> xx-x* (* = type designator of the
phone, eg. RM-70), or press Ctrl + R to scan product.
iv From the toolbar, set operating mode to “Local”.
5. EGSM900/1800/1900 troubleshooting
i From the Testing menu, activate the
RF Controls
window: Testing -> GSM -> RF Controls .
ii In the
RF Controls
window:
• Select band (Default = “GSM900”).
• Set Active unit to “Rx” (Default ).
• Set Operation mode to “Burst” (Default).
• Set Rx/Tx channel (see table below).
• Apply a frequency (see table below) to the RF-connector.
Note:
Remember to compensate for cable attenuation, specific for MJ-62. You will find the
values in the Service tools section.
Apply 942.46771 MHz (channel 37 + 67.710 kHz offset), MHz (channel 700 + 67.710 kHz offset) or
MHz (channel 661 + 67.71 kHz) –90 dBm signal to the RF-connector (remember to compensate for
cable attenuation).
Band
Channel (RX and
TX)
Input frequency
(MHz)
Offset (kHz)
Power level
(dBm)
GSM900
37
942.46771
67.710
-90
RM-70
Nokia Customer Care
RF Troubleshooting and Manual Tuning Guide
Page 7 –6
COMPANY CONFIDENTIAL
Issue 1
Copyright © 2005 Nokia. All rights reserved.
