Motorola V3 Service Manual Trouble Shooting

Motorola GmbH, CSS Center, Mobile Devices Title: Troubleshooting-Guide V3 Page: 1 / 11

Doc. No: TSG_V3 Version: 1.1 Date: 09.06.2005

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Doc. No: TSG_V3 Version: 1.1

Motorola GmbH, CSS Center, Mobile Devices

Date: 09.06.2005

Title: Troubleshooting-Guide V3 Page: 2 / 11

Table of contents

1.0 Preamble

2.0 Some basic tips

3.0 Top 10 defective parts

4.0 Most frequent failure codes and root causes

Troubleshooting

5.0 U700

5.1 U50

5.2 Keyboard Flex Assy

5.3 U900

5.4 U800

5.5 Display

5.6 J 41

5.7 J-Keyboard

Modified Date

9. June 2005 L. Heide

By

Repair Support Information

Doc. No: TSG_V3 Version: 1.1

Motorola GmbH, CSS Center, Mobile Devices

Date: 09.06.2005

Title: Troubleshooting-Guide V3 Page: 3 / 11

1.0 Preamble

This document was created to assist analyzers when fixing problems on Motorola GSM Phones. All information was collected during the repair in the Repairentitlement Group Flensburg.

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Doc. No: TSG_V3 Version: 1.1 Date: 09.06.2005

2.0 Some basic tips

2.1 Software upgrade

- always use the latest Software available for the phone (Software- bugs are excluded)

2.2 Visual inspection

- check for liquid damage (water indicator)

- check for missing, broken or unsoldered parts

- check for mechanical damage (board twisted, tracks defect etc.)

2.3 Cross check

- before beginning to replace/change parts or soldering anything try to consider the failure from all sides.

2.4 Solder process

- the soldering process of lead-free products always must be done with the aid of a bottom-heater and flux for lead-free soldering

- always cover sensitive parts with shields

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