2. Connect a DC power supply to a product-specific module jig.
Note: When repairing or tuning a transmitter, use an external DC supply with at least 3 A current
capability.
Set the DC supply voltage to 3.9 V.
3. Connect an RF cable between the RF connector of the product-specific module test jig and measurement
equipment or alternatively use a 50 ohms (at least 2 W) dummy load in the module test jig RF connector;
otherwise GSM or WCDMA PA may be damaged.
Note: There are three antenna connectors in the module jig:
• one for GSM
• one for WCDMA
• one for Bluetooth and WLAN* (* = if applicable)
Make sure that all connections are made to the correct RF connector.
Normally a spectrum analyser is used as measurement equipment.
Note: The maximum input power of a spectrum analyser is +30 dBm.
To prevent any damage, it is recommended to use 10 dB attenuator on the spectrum analyzer input.
4. Set Tx on.
i Place the phone module to the test jig and start
Phoenix
service software.
ii Initialize connection to the phone (with FPS-10 use FBUS when using a DAU-9S cable and a COMBOX
driver).
iii Choose File→Open Product→xx-x* (* = type designator of the phone) or File→Scan Product. .
iv From the toolbar, set Operating mode to Local.
Alternative steps
• EGSM900/GSM1800/GSM1900 troubleshooting
i Choose Testing→GSM→RF Controls.
ii In the
RF Controls
window:
• Choose Band: GSM900 or GSM1800 or GSM1900 (Default = GSM900).
• Set Rx/Tx channel in the following way:
• GSM900: 37
• GSM1800: 700
• GSM1900: 661
• Set Active unit to Tx (Default = Rx).
• Set Operation Mode to Burst (Default = Burst).
• Set Edge to Off (Default).
• Set Tx Data Type to All 1 (Default = All 1).
• Set Tx PA Mode to High (Default).
• Set Tx Power Level in the following way:
• GSM900: 5 (Default = 19)
• GSM1800: 0 (Default = 15)
• GSM1900: 0 (Default = 15)
RM-91; RM-92
RF Troubleshooting and Manual Tuning Guide Nokia Customer Care
Issue 1 COMPANY CONFIDENTIAL Page 7 –19
Copyright © 2006 Nokia. All rights reserved.
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