Service Manuals, User Guides, Schematic Diagrams or docs for : NOKIA Mobile Phone 3100-3120 06-rh19-rh50-bb-troublesht
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Nokia Customer Care
RH-19/RH-50 Series Cellular Phones
6 - Baseband Description and
Troubleshooting
Issue 3 05/2004 2004 Nokia Corporation. Page 1
Company Confidential
RH-19/RH-50 Company Confidential
6 - Baseband Description and Troubleshooting Nokia Customer Care
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Page 2 2004 Nokia Corporation. Issue 3 05/2004
Company Confidential RH-19/RH-50
Nokia Customer Care 6 - Baseband Description and Troubleshooting
Table of Contents
Page No
Baseband Top-Level Description .......................................................................................................... 5
Baseband block diagram .................................................................................................................... 5
RH-19/RH-50 baseband feature list ............................................................................................... 6
Environmental specifications ............................................................................................................ 6
Normal and extreme voltages......................................................................................................... 6
Temperature conditions .................................................................................................................... 6
Humidity................................................................................................................................................ 7
Frequencies in baseband .................................................................................................................... 7
Printed wire board (PWB) ................................................................................................................... 7
Baseband Architecture............................................................................................................................ 8
Baseband core ....................................................................................................................................... 8
Universal Phone Processor (UPP).................................................................................................... 8
Universal Energy Management (UEMK) ....................................................................................... 8
External flash and external SRAM................................................................................................. 9
Energy management ............................................................................................................................ 9
Power supply modes .......................................................................................................................... 9
Battery BL-5C/BR-5C.......................................................................................................................13
Power distribution ............................................................................................................................13
DC characteristics ..............................................................................................................................16
Charging ................................................................................................................................................17
Audio circuitry .....................................................................................................................................17
Audio block diagram ........................................................................................................................18
Earpiece ...............................................................................................................................................18
Microphones.......................................................................................................................................18
Integrated hands-free (IHF) ...........................................................................................................19
Audio accessory receive path ........................................................................................................19
Audio control signals .......................................................................................................................19
Acoustics ...............................................................................................................................................20
Earpiece acoustic ..............................................................................................................................20
IHF speaker acoustics ......................................................................................................................20
Microphone acoustics .....................................................................................................................21
Vibra motor.........................................................................................................................................21
Audio modes ........................................................................................................................................22
Hand portable mode ........................................................................................................................22
Integrated hands-free audio mode..............................................................................................23
Headset audio mode ........................................................................................................................23
Loop set audio mode........................................................................................................................23
External hands-free audio mode..................................................................................................24
User Interface ..........................................................................................................................................25
LCD module ..........................................................................................................................................25
Baseband-LCD interface .................................................................................................................25
DC characteristics.............................................................................................................................25
Current consumption.......................................................................................................................27
Maximum ratings..............................................................................................................................27
AC characteristics.............................................................................................................................27
Reset timing .......................................................................................................................................29
Display power on/off sequence.....................................................................................................29
Issue 3 05/2004 2004 Nokia Corporation. Page 3
RH-19/RH-50 Company Confidential
6 - Baseband Description and Troubleshooting Nokia Customer Care
LED power supply ...............................................................................................................................30
Keypad ...................................................................................................................................................30
SIM Interface ...........................................................................................................................................32
BB-RF Interface.......................................................................................................................................33
Digital signals between BB and RF ................................................................................................33
Analog signals between BB and RF ...............................................................................................35
Voltage regulators in BB for RF ......................................................................................................37
System Connector Interface ................................................................................................................40
System connector ...............................................................................................................................40
Accessory control interface (ACI) ..................................................................................................41
Signal flow on ACI line - ACI-ASIC accessory inserted .........................................................42
Signal flow on ACI line - Non ACI-ASIC accessory inserted ................................................43
FBUS .....................................................................................................................................................44
VOUT (Accessory Voltage Regulator)...........................................................................................44
HookInt ..................................................................................................................................................45
Charging ................................................................................................................................................46
DC-plug................................................................................................................................................46
VCHAR pins of system connector.................................................................................................46
Voltages and currents .......................................................................................................................47
Baseband Calibration.............................................................................................................................48
Energy management calibration ....................................................................................................48
Calibration method with JBV-1....................................................................................................48
Calibration method without JBV-1 .............................................................................................49
LCD contrast tuning ...........................................................................................................................50
Baseband Testpoints ..............................................................................................................................52
List and description ............................................................................................................................52
Testpoints on bottom side ...............................................................................................................54
Testpoints on top side .......................................................................................................................55
Baseband Troubleshooting...................................................................................................................56
Top level flowchart ............................................................................................................................57
Phone is dead ......................................................................................................................................59
Flash faults ...........................................................................................................................................61
Phone is jammed ................................................................................................................................63
Charger ..................................................................................................................................................66
SIM card error .....................................................................................................................................67
Audio faults ..........................................................................................................................................68
Earpiece fault .......................................................................................................................................72
Display fault .........................................................................................................................................73
Keypad fault .........................................................................................................................................75
Selftest failure .....................................................................................................................................77
Active cover interface .......................................................................................................................78
Page 4 2004 Nokia Corporation. Issue 3 05/2004
Company Confidential RH-19/RH-50
Nokia Customer Care 6 - Baseband Description and Troubleshooting
Baseband Top-Level Description
THe RH-19/RH-50 product is a hand portable GSM850 (RH-50), EGSM900 (RH-19)
GSM1800 (RH-19/RH-50), GSM1900 (RH-19/RH-50) DCT-4 generation phone for the
expression segment, with optional active covers available.
The RH-19/RH-50 baseband consists of the DCT4 common baseband chipset having
some product specific blocks of its own, such as PopPortTM system connector, IHF and a
color display.
The baseband engine consists basically of two major ASIC's.
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