User Guide

Baseband troubleshooting overview

This section is intended to be a guide for localising and repairing electrical faults.

The table below tells you what troubleshooting to go to.

Problem Troubleshooting

Abnormal current consumption 1 General power checking troubleshooting

(page 3–6)

2 Battery current measuring fault troubleshooting

(page 3–6)

Flashing does not work or the problem is not clearly

defined

1 Flash programming fault troubleshooting

(page 3–16)

2 Clocking troubleshooting (page 3–9)

3 Combo memory troubleshooting (page 3–14)

Charging does not work Charging troubleshooting (page 3–8)

Display does not work Display troubleshooting (page 3–23)

Backlights do not work 1 Backlight troubleshooting (page 3–24)

2 LED driver troubleshooting (page 3–25)

USB does not work USB troubleshooting (page 3–49)

Audio (mic, earpiece, IHF) does not work 1 Audio troubleshooting (page 3–27)

2 Acoustics troubleshooting (page 3–36)

Camera does not work Camera troubleshootoing (page 3–11)

Slide sensor detection MR sensor troubleshooting (page 3–27)

Bluetooth does not work Bluetooth troubleshooting (page 3–39)

FM radio does not work FM radio troubleshooting (page 3–18)

RM-164

BB Troubleshooting and Manual Tuning Guide

Issue 1 COMPANY CONFIDENTIAL Page 3 –5