Table Of Contents - Nokia 6235 Baseband Description And Troubleshooting

6235/6235i/6236i (RM-60)
Baseband Description and Troubleshooting
Contents
Introduction ..................................................................................................................................................... 5
Power Up Sequence ....................................................................................................................................... 7
Flash Programming ........................................................................................................................................ 8
Flashing Tool ................................................................................................................................................. 8
Flashing Phoenix Interface ....................................................................................................................... 9
Audio .................................................................................................................................................................. 9
How the Audio Works ................................................................................................................................ 9
Audio Troubleshooting .............................................................................................................................10
Audio Phoenix Interface ..........................................................................................................................12
Camera............................................................................................................................................................ 12
How the Camera Works ...........................................................................................................................12
Camera Troubleshooting ..........................................................................................................................13
Camera Phoenix Interface .......................................................................................................................14
FM Radio ........................................................................................................................................................ 15
How the FM Radio Works .......................................................................................................................15
FM Radio Test .............................................................................................................................................15
FM Radio Troubleshooting ......................................................................................................................15
FM Radio Phoenix Interface ...................................................................................................................16
USB (Universal Serial Bus)......................................................................................................................... 17
How USB Interface Works .......................................................................................................................17
USB Troubleshooting ................................................................................................................................18
USB Phoenix Interface .............................................................................................................................20
Display ............................................................................................................................................................ 21
How the Display Works ............................................................................................................................21
Display Troubleshooting ..........................................................................................................................21
Display Backlight Troubleshooting .......................................................................................................22
Display Phoenix Interface .......................................................................................................................24
Keypad Backlight ......................................................................................................................................... 24
How the Keypad Backlight Works ........................................................................................................24
Keypad Backlight Troubleshooting .......................................................................................................25
Keypad Backlight Display Phoenix Interface .....................................................................................27
GPS................................................................................................................................................................... 27
How GPS Works .........................................................................................................................................27
GPS Troubleshooting ................................................................................................................................28
GPS Phoenix Interface ..............................................................................................................................31
SIM Card......................................................................................................................................................... 31
How SIM Card Works ...............................................................................................................................31
SIM Card Troubleshooting ......................................................................................................................32
Sim Card Phoenix Interface ....................................................................................................................35
Infrared ........................................................................................................................................................... 35
How Infrared Works ..................................................................................................................................35
Infrared Troubleshooting .........................................................................................................................36
Infrared Phoenix Interface ......................................................................................................................37
System Connector........................................................................................................................................ 38
Accessory Detection.................................................................................................................................... 39
Battery (Lynx) Interface Circuit ............................................................................................................... 40
PWB Overview .............................................................................................................................................. 41
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Issue 1 04/2005