Table of Contents
Baseband main troubleshooting..........................................................................................................................3–5
General power checking ........................................................................................................................................3–7
Backup battery troubleshooting...........................................................................................................................3–8
Dead or jammed device troubleshooting......................................................................................................... 3–10
Keyboard troubleshooting ................................................................................................................................. 3–11
Hall sensor troubleshooting............................................................................................................................... 3–13
TV- out troubleshooting ..................................................................................................................................... 3–14
General power checking troubleshooting ........................................................................................................ 3–15
USB troubleshooting ........................................................................................................................................... 3–16
SIM card troubleshooting ................................................................................................................................... 3–17
MicroSD card troubleshooting............................................................................................................................ 3–18
Combo memory troubleshooting ...................................................................................................................... 3–20
Flash programming troubleshooting................................................................................................................ 3–21
USB charging troubleshooting........................................................................................................................... 3–24
Clocking troubleshooting ................................................................................................................................... 3–25
Power key troubleshooting................................................................................................................................ 3–26
User interface troubleshooting.......................................................................................................................... 3–27
Accelerometer troubleshooting......................................................................................................................... 3–28
Magnetometer troubleshooting ........................................................................................................................ 3–30
Display Troubleshooting..................................................................................................................................... 3–33
Display Troubleshooting................................................................................................................................ 3–33
Illumination troubleshooting ....................................................................................................................... 3–35
LED driver troubleshooting ........................................................................................................................... 3–38
I/O expander troubleshooting ...................................................................................................................... 3–39
Audio Troubleshooting....................................................................................................................................... 3–39
Audio troubleshooting test instructions...................................................................................................... 3–39
External earpiece troubleshooting............................................................................................................... 3–43
DAC33 troubleshooting.................................................................................................................................. 3–44
External microphone troubleshooting ........................................................................................................ 3–45
Internal earpiece troubleshooting .............................................................................................................. 3–46
Internal handsfree speaker troubleshooting ............................................................................................. 3–47
Internal microphone troubleshooting ........................................................................................................ 3–48
Vibra troubleshooting.................................................................................................................................... 3–49
ALS Technical Description and Troubleshooting.............................................................................................. 3–50
Ambient Light Sensor..................................................................................................................................... 3–50
ALS troubleshooting....................................................................................................................................... 3–50
Re-tuning ALS.................................................................................................................................................. 3–51
Bluetooth and FM Radio Troubleshooting........................................................................................................ 3–52
Introduction to Bluetooth/FM radio troubleshooting................................................................................ 3–52
Bluetooth BER test.......................................................................................................................................... 3–55
Bluetooth and FM radio self tests in Phoenix.............................................................................................. 3–55
Bluetooth troubleshooting ........................................................................................................................... 3–57
FM radio troubleshooting.............................................................................................................................. 3–57
FM radio testing.............................................................................................................................................. 3–59
GPS Troubleshooting........................................................................................................................................... 3–59
GPS layout and basic test points................................................................................................................... 3–59
GPS Settings for Phoenix ............................................................................................................................... 3–60
GPS control................................................................................................................................................. 3–60
Quick Test window.................................................................................................................................... 3–61
GPS failure troubleshooting.......................................................................................................................... 3–63
RM-484; RM-485; RM-486
BB Troubleshooting
Issue 1 COMPANY CONFIDENTIAL Page 3 –3
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