Table of Contents
Introduction to BB troubleshooting.................................................................................................................... 3–5
Baseband self self-test in Care Suite.................................................................................................................... 3–7
Power and charging troubleshooting................................................................................................................. 3–9
Dead or jammed device troubleshooting...................................................................................................... 3–9
General power checking............................................................................................................................... 3–10
Charging troubleshooting ............................................................................................................................ 3–12
Clocking troubleshooting ............................................................................................................................. 3–13
Power-on key troubleshooting.................................................................................................................... 3–15
Interface troubleshooting ................................................................................................................................. 3–17
Flash programming troubleshooting.......................................................................................................... 3–17
Memory troubleshooting.............................................................................................................................. 3–17
Memory card troubleshooting ..................................................................................................................... 3–18
SIM cards troubleshooting ........................................................................................................................... 3–19
Dual SIM troubleshooting............................................................................................................................. 3–22
USB interface troubleshooting..................................................................................................................... 3–24
User interface troubleshooting......................................................................................................................... 3–25
Keypad troubleshooting............................................................................................................................... 3–25
Keypad illumination troubleshooting......................................................................................................... 3–26
Display module troubleshooting................................................................................................................. 3–28
General instructions for display troubleshooting................................................................................. 3–28
Display module troubleshooting............................................................................................................ 3–29
Camera interface troubleshooting ................................................................................................................... 3–29
Camera troubleshooting instructions ......................................................................................................... 3–29
No valid data from Camera .......................................................................................................................... 3–31
Audio troubleshooting....................................................................................................................................... 3–31
Audio troubleshooting test instructions..................................................................................................... 3–31
Internal earpiece troubleshooting .............................................................................................................. 3–33
Internal handsfree (IHF) troubleshooting................................................................................................... 3–33
Internal microphone troubleshooting........................................................................................................ 3–34
External earpiece troubleshooting.............................................................................................................. 3–35
External microphone troubleshooting........................................................................................................ 3–36
Vibrator troubleshooting ............................................................................................................................. 3–38
Baseband manual tuning guide........................................................................................................................ 3–39
Energy management calibration................................................................................................................. 3–39
PIT function instruction................................................................................................................................ 3–42
PIT function overview.............................................................................................................................. 3–42
Certificate restore..................................................................................................................................... 3–43
Product code change ............................................................................................................................... 3–45
List of Tables
Table 1 Display module troubleshooting cases............................................................................................... 3–28
Table 2 Pixel defects .......................................................................................................................................... 3–28
Table 3 All test items for audio......................................................................................................................... 3–32
List of Figures
Figure 8 Test pads ................................................................................................................................................. 3–6
Figure 9 Camera interface signals (Blue is clk red data) ................................................................................ 3–30
Figure 10 Camera interface IC troubleshooting guide ................................................................................... 3–31
RM-839; RM-840; RM-841
BB Troubleshooting and Manual Tuning Guide
Issue 1 NOKIA INTERNAL USE ONLY Page 3 – 3
Copyright © 2013 Nokia. All rights reserved.
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