Table of Contents
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RM-272; RM-273
BB Troubleshooting and Manual Tuning 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.
Abnormal current consumption
Flashing does not work or the problem is not clearly
defined
Charging does not work
Display does not work
Backlights do not work
USB does not work
Audio (mic, earpiece, IHF) does not work
Camera does not work
Bluetooth does not work
FM radio does not work
MicroSD card does not work
Issue 1
Problem
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Troubleshooting
1
General power checking (page 3–6)
2
Battery current measuring fault (page 3–6)
1
Flashing (page 3–15)
2
Clocking (page 3–9)
3
Combo memory (page 3–14)
Charging (page 3–8)
Display fault (page )
1
Backlight (page 3–23)
2
LED driver (page 3–8)
USB (page 3–42)
1
Audio (page 3–25)
2
Acoustics (page 3–25)
1
Camera baseband hardware (page 3–11)
2
Camera viewfinder (page 3–12)
3
Bad image quality (page 3–13)
Bluetooth (BT) (page 3–36)
FM radio (page 3–17)
MicroSD card (page )
Page 3 –5
- Quick Links:
- Display and Keypad Features
- Hardware Features
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Troubleshooting
