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4. To perform the measurement, click Start.

Transmitter troubleshooting

General instructions for Tx troubleshooting

Context

• Tx troubleshooting requires Tx operation.

• Do not transmit on frequencies that are in use!

• Transmitter can be controlled in the local mode for diagnostic purposes.

• The most useful Phoenix tool for GSM transmitter testing is "RF Controls"; in WCDMA transmitter testing

the best tool is "Tx Control".

• 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. The first section

is for the GSM800/EGSM900/GSM1800/GSM1900 bands and the latter for WCDMA.

Caution: Never activate the GSM or WCDMA 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 or WCDMA PA may be damaged.

Steps

1. Connect a test jig to a computer with a DAU-9S cable or to a FPS-8 flash prommer with a modular cable.

Make sure that you have a PKD-1 dongle connected to the computer's parallel port.

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 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 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

Make sure that all connections are made to the correct RF connector.

RM-10;RM-24

RF Troubleshooting and Manual Tuning Guide Nokia Customer Care

Issue 1 COMPANY CONFIDENTIAL Page 7 –15