Table of Contents
Baseband self tests in Phoenix ............................................................................................................................ 3–5
Power and charging troubleshooting................................................................................................................. 3–7
Dead or jammed device troubleshooting...................................................................................................... 3–7
Dynamo charging troubleshooting ................................................................................................................ 3–9
Power key troubleshooting.......................................................................................................................... 3–10
General voltage checking troubleshooting ............................................................................................... 3–11
General power checking............................................................................................................................... 3–13
Charging troubleshooting ............................................................................................................................ 3–14
USB charging troubleshooting..................................................................................................................... 3–15
Battery current measuring fault troubleshooting ..................................................................................... 3–16
Interface troubleshooting ................................................................................................................................. 3–17
SIM card troubleshooting ............................................................................................................................. 3–17
MicroSD card troubleshooting...................................................................................................................... 3–18
USB troubleshooting..................................................................................................................................... 3–20
USB data interface troubleshooting....................................................................................................... 3–20
USB charging troubleshooting................................................................................................................ 3–22
User interface troubleshooting......................................................................................................................... 3–23
Keyboard and side keys troubleshooting ................................................................................................... 3–23
Keyboard LEDs troubleshooting................................................................................................................... 3–24
Touch screen troubleshooting.......................................................................................................................... 3–24
Introduction to touch screen troubleshooting .......................................................................................... 3–24
Proximity sensor troubleshooting............................................................................................................... 3–25
Resistive touch screen troubleshooting ..................................................................................................... 3–27
Display module troubleshooting ...................................................................................................................... 3–30
General instructions for display troubleshooting...................................................................................... 3–30
Display fault troubleshooting ...................................................................................................................... 3–32
Display backlight troubleshooting .............................................................................................................. 3–32
Camera module troubleshooting...................................................................................................................... 3–33
Introduction to camera troubleshooting ................................................................................................... 3–33
Camera troubleshooting............................................................................................................................... 3–34
Taking and evaluating test pictures....................................................................................................... 3–34
Camera troubleshooting.......................................................................................................................... 3–35
Camera baseband troubleshooting........................................................................................................ 3–35
Camera no recognizable viewfinder image troubleshooting.............................................................. 3–36
Camera bad image quality troubleshooting ......................................................................................... 3–37
Audio troubleshooting....................................................................................................................................... 3–39
Audio troubleshooting test instructions..................................................................................................... 3–39
Internal earpiece troubleshooting .............................................................................................................. 3–41
Internal microphone troubleshooting........................................................................................................ 3–41
Internal handsfree (IHF) troubleshooting................................................................................................... 3–43
Acoustics troubleshooting............................................................................................................................ 3–43
Introduction to acoustics troubleshooting ........................................................................................... 3–43
Earpiece troubleshooting........................................................................................................................ 3–44
IHF troubleshooting................................................................................................................................. 3–45
Microphone troubleshooting .................................................................................................................. 3–46
Vibra troubleshooting................................................................................................................................... 3–47
Baseband manual tuning guide........................................................................................................................ 3–47
Energy management calibration................................................................................................................. 3–47
RM-781
BB Troubleshooting and Manual Tuning Guide
Issue 1 COMPANY CONFIDENTIAL Page 3 – 3
Copyright © 2011 Nokia. All rights reserved.
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