User Guide

Table of Contents
Baseband main troubleshooting..........................................................................................................................3–5
General power checking ........................................................................................................................................3–6
Backup battery troubleshooting...........................................................................................................................3–7
Dead or jammed device troubleshooting............................................................................................................3–9
USB troubleshooting ........................................................................................................................................... 3–10
SIM card troubleshooting ................................................................................................................................... 3–11
MicroSD card troubleshooting............................................................................................................................ 3–13
TV out troubleshooting....................................................................................................................................... 3–15
Combo memory troubleshooting ...................................................................................................................... 3–16
Flash programming troubleshooting................................................................................................................ 3–17
Charging troubleshooting .................................................................................................................................. 3–20
Clocking troubleshooting ................................................................................................................................... 3–21
Power key troubleshooting................................................................................................................................ 3–22
Naviscroll troubleshooting................................................................................................................................. 3–23
Keyboard troubleshooting ................................................................................................................................. 3–24
Display Technical Description and Troubleshooting........................................................................................ 3–24
Display ............................................................................................................................................................. 3–24
Display troubleshooting ................................................................................................................................ 3–25
Display backlight and illumination troubleshooting.................................................................................. 3–28
LED driver troubleshooting ........................................................................................................................... 3–29
Audio Troubleshooting....................................................................................................................................... 3–30
External earpiece troubleshooting 1 and 2................................................................................................. 3–30
External microphone troubleshooting ........................................................................................................ 3–31
Internal earpiece troubleshooting .............................................................................................................. 3–32
Internal handsfree speaker troubleshooting ............................................................................................. 3–34
Internal microphone troubleshooting......................................................................................................... 3–35
ALS Technical Description and Troubleshooting.............................................................................................. 3–36
Ambient Light Sensor..................................................................................................................................... 3–36
ALS troubleshooting....................................................................................................................................... 3–36
Re-tuning ALS.................................................................................................................................................. 3–37
Bluetooth and FM Radio Troubleshooting........................................................................................................ 3–39
Introduction to Bluetooth/FM radio troubleshooting................................................................................ 3–39
Bluetooth BER test.......................................................................................................................................... 3–42
Bluetooth and FM radio self tests in Phoenix.............................................................................................. 3–43
FM radio testing.............................................................................................................................................. 3–43
Bluetooth troubleshooting ........................................................................................................................... 3–45
FM radio troubleshooting.............................................................................................................................. 3–45
GPS Troubleshooting........................................................................................................................................... 3–47
GPS layout and basic test points................................................................................................................... 3–47
GPS Settings for Phoenix ............................................................................................................................... 3–47
GPS control................................................................................................................................................. 3–47
Quick Test window.................................................................................................................................... 3–48
GPS failure troubleshooting.......................................................................................................................... 3–50
WLAN Troubleshooting....................................................................................................................................... 3–51
WLAN component layout and test points.................................................................................................... 3–51
WLAN selftest and coexistence test in Phoenix........................................................................................... 3–51
WLAN functional tests.................................................................................................................................... 3–53
WLAN failure troubleshooting ...................................................................................................................... 3–56
RM-348; RM-349; RM-350
Baseband Troubleshooting
Issue 2 COMPANY CONFIDENTIAL Page 3 –3
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