Инструкции По Обслуживанию для Nokia n-gageqd

Nokia Customer Care

6b - Baseband Troubleshooting

                                 Company Confidential

      RH-29

Issue 1  05/2004

        Copyright ©

 2004 Nokia Corporation

Page 3

Company Confidential

This document is intend to be a guide for localizing and repairing electrical faults in the 
RH-29 device. First there is a brief guide for fault localizing. Then fault repairing is 
divided into troubleshooting paths. 

Before any service operation you must be familiar with the RH-29 product and module 
level architecture. You have to also be familiar with the RH-29 specified service tools 
such as the Phoenix service software, flashing tools and software. 

•

Service tools (as listed at service tools chapter in service manual)

•

Laboratory power supply with current indicator

•

Oscilloscope

•

Digital multimeter

If the device cannot be turned on by any means, see “dead device” troubleshooting

Current consumption (missing consumption) gives an idea whether the device is able to 
start up.

Dropping supply voltage or very large current consumption indicates a short circuit

Check whether the connection with Phoenix works and what can be discovered with 
Phoenix (ADC-readings, baseband self-test, BB-calibrations etc.)

Check baseband self-tests with Phoenix if “CONTACT SERVICE” is shown on the display.

Check visually display and rocker faults.

Force phone to LOCAL mode and make keyboard test by phoenix.

Check that board-to-board connector is OK, and connectors make good contacts.

If liquid damage, stop repairing!

Flash the phone before disassembling it, if the fault is not obvious and the Phoenix con-
nection is OK.

Disassemble phone:

Try to locate failed module.