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Nokia Customer Care
6 - Baseband Description
and Troubleshooting
Issue 1 12/04
COMPANY CONFIDENTIAL
Copyright © 2004 Nokia. All Rights Reserved.
RAE-6/RA-4
6 - Baseband Description and Troubleshooting
Nokia Customer Care
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Issue 1 12/04
COMPANY CONFIDENTIAL
Copyright © 2004 Nokia. All Rights Reserved.
2
RAE-6/RA-4
6 - Baseband Description and Troubleshooting
Nokia Customer Care
Abbreviations ...................................................................................................... 7
Baseband Top-Level Description ...................................................................... 9
Operating conditions ........................................................................................ 10
Absolute maximum ratings ............................................................................ 10
DC characteristics .......................................................................................... 11
Temperature conditions ................................................................................. 11
ESD immunity ................................................................................................ 11
Functional Description of CMT ........................................................................ 12
Interfaces between CMT and APE................................................................... 13
XBUS ............................................................................................................. 13
XABUS ........................................................................................................... 13
Functional Description of APE ........................................................................ 14
Audio................................................................................................................ 14
Audio control signals........................................................................................ 15
Audio modes .................................................................................................... 15
HP call ............................................................................................................ 15
IHF call ........................................................................................................... 15
Accessory call ................................................................................................ 15
APE audio ...................................................................................................... 16
Internal interfaces ............................................................................................ 16
McBSP interfaces .......................................................................................... 16
MCSI interfaces ............................................................................................. 16
UART interfaces ............................................................................................. 16
µWire interface ............................................................................................... 16
I2C ................................................................................................................. 16
ARMIO ........................................................................................................... 17
GPIO .............................................................................................................. 17
External interfaces ........................................................................................... 17
Back cover switch .......................................................................................... 17
Lid hall switch ................................................................................................. 17
MMC .............................................................................................................. 17
USB ................................................................................................................ 17
UI interfaces..................................................................................................... 17
Displays ......................................................................................................... 17
Keyboards ...................................................................................................... 18
Bluetooth ........................................................................................................ 18
IrDA ................................................................................................................ 18
Energy Management ......................................................................................... 19
CMT EM........................................................................................................... 20
APE EM ........................................................................................................... 20
Battery.............................................................................................................. 21
Charging .......................................................................................................... 22
Backup battery and RTC.................................................................................. 22
Issue 1 12/04
COMPANY CONFIDENTIAL
Copyright © 2004 Nokia. All Rights Reserved.
3
RAE-6/RA-4
Nokia Customer Care
6 - Baseband Description and Troubleshooting
Display and keypad illumination....................................................................... 22
Power up and system states ............................................................................ 22
Operating modes ........................................................................................... 23
Power up sequence ....................................................................................... 23
System Connector ............................................................................................ 24
Universal Serial Bus (USB) .............................................................................. 25
Accessory Control Interface (ACI) ................................................................... 25
VOUT (Accessory Voltage Regulator) ........................................................... 26
HookInt............................................................................................................. 26
DC-plug .......................................................................................................... 26
VCHAR pins of system connector .................................................................. 26
After Sales Interface ......................................................................................... 27
User Interface .................................................................................................... 28
Component placement and FPWB outline of 1BD ........................................... 29
Hinge connector............................................................................................... 30
PDA display ..................................................................................................... 31
Interface ......................................................................................................... 31
CMT display ..................................................................................................... 33
Interface ......................................................................................................... 33
CMT keypad..................................................................................................... 35
Description of operation ................................................................................. 35
Illumination and drivers .................................................................................. 35
PDA keypad ..................................................................................................... 36
Hall-sensor ..................................................................................................... 36
Baseband Troubleshooting.............................................................................. 38
Top level flowchart ........................................................................................... 39
Phone is dead troubleshooting ........................................................................ 41
IR troubleshooting............................................................................................ 42
Illumination troubleshooting ............................................................................. 43
SIM troubleshooting ......................................................................................... 44
UI troubleshooting............................................................................................ 45
PDA LCD troubleshooting .............................................................................. 46
CBA keys troubleshooting .............................................................................. 47
QWERTY troubleshooting .............................................................................. 48
Charging troubleshooting................................................................................. 49
USB troubleshooting ........................................................................................ 50
Accessory troubleshooting............................................................................... 51
MMC troubleshooting....................................................................................... 52
Audio troubleshooting ...................................................................................... 53
MDOC troubleshooting .................................................................................... 55
SDRAM troubleshooting .................................................................................. 56
Flash troubleshooting....................................................................................... 57
APE clock and reset troubleshooting ............................................................... 58
4
COMPANY CONFIDENTIAL
Copyright © 2004 Nokia. All Rights Reserved.
Issue 1 12/04
RAE-6/RA-4
6 - Baseband Description and Troubleshooting
Nokia Customer Care
CMT troubleshooting........................................................................................ 59
EM troubleshooting (APE) ............................................................................... 60
Bluetooth troubleshooting ................................................................................ 61
Issue 1 12/04
COMPANY CONFIDENTIAL
Copyright © 2004 Nokia. All Rights Reserved.
5
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