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• Tx IQ tuning and Tx power tuning can be also used in some cases.

• Remember that retuning is not a fix! Phones are tuned correctly in production.

The first set of steps instructs how to assemble the test setup. This setup is general for all Tx troubleshooting

tasks.

Alternative steps provide specific troubleshooting instructions for

Phoenix

service software.

Caution: Never activate the GSM transmitter without a proper antenna load. There should be always

50 ohm load connected to the RF connector (antenna, RF-measurement equipment or at least 2

watts dummy load), otherwise GSM PA may be damaged.

Steps

1. Connect a test jig to a computer with a DKU-2 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 a DC power supply to a module jig (MJ-69).

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 12V and set the jumper connector on the test jig's reg.pass switch to

“ON” position.

3. Connect an RF cable between the RF connector of the module test jig (MJ-69) and measurement equipment

or alternatively use a 50 ohms (at least 2 W) dummy load in the module test jig RF connector, otherwise

GSM may be damaged.

Note: There are two antenna connectors in the module jig:

• one for GSM

• one for Bluetooth

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 Set the phone module to the test jig and start

Phoenix service software

ii Initialize connection to the phone. (With FPS-10 use FBUS driver when using DAU-9S and COMBOX

driver).

iii From the File menu, choose product: File -> Choose Product -> xx-x* (* = type designator of the

phone).

iv From the toolbar, set operating mode to “Local”.

5. EGSM900, GSM850/1800/1900 troubleshooting

i From the Testing menu, activate the

RF Controls

window: Testing -> GSM -> RF Controls .

RM-170; RM-171

Nokia Customer Care RF Troubleshooting and Manual Tuning Guide

Page 7 –14 COMPANY CONFIDENTIAL Issue 1