Nokia N900, Руководство по обслуживанию

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Table of Contents
Introduction ............................................................................................................................................................ 6–5
Phone description ............................................................................................................................................. 6–5
Functional description ...................................................................................................................................... 6–5
Main components .............................................................................................................................................. 6–5
Energy management .............................................................................................................................................. 6–7
Battery and charging ........................................................................................................................................ 6–7
Backup battery ................................................................................................................................................... 6–8
Normal and extreme voltages ......................................................................................................................... 6–8
Power key and system power-up .................................................................................................................... 6–9
Power distribution ......................................................................................................................................... 6–10
Clocking scheme ............................................................................................................................................. 6–10
Bluetooth and FM RDS radio module ................................................................................................................. 6–11
GPS module .......................................................................................................................................................... 6–12
WLAN module ...................................................................................................................................................... 6–13
FM transmitter module ....................................................................................................................................... 6–14
High-speed USB .................................................................................................................................................... 6–15
Memory card interfaces ...................................................................................................................................... 6–15
I2C buses .............................................................................................................................................................. 6–16
User interface ....................................................................................................................................................... 6–16
Display module ............................................................................................................................................... 6–16
Touch screen ................................................................................................................................................... 6–16
Keyboard ......................................................................................................................................................... 6–16
Cameras ........................................................................................................................................................... 6–17
Illumination .................................................................................................................................................... 6–17
Sensors ............................................................................................................................................................ 6–17
TV-out interface .............................................................................................................................................. 6–18
Consumer infrared transmitter (CIR) ............................................................................................................ 6–18
Audio concept ...................................................................................................................................................... 6–18
Audio HW architecture ................................................................................................................................... 6–18
Cellular RF technical description ........................................................................................................................ 6–20
RF block diagram ............................................................................................................................................ 6–20
Receiver (RX) ................................................................................................................................................... 6–22
Transmitter (TX) ............................................................................................................................................. 6–22
Frequency mappings ........................................................................................................................................... 6–23
GSM850 frequencies ....................................................................................................................................... 6–23
EGSM900 frequencies ..................................................................................................................................... 6–23
GSM1800 frequencies ..................................................................................................................................... 6–24
GSM1900 frequencies ..................................................................................................................................... 6–26
WCDMA 2100 Rx frequencies ......................................................................................................................... 6–27
WCDMA 2100 Tx frequencies ......................................................................................................................... 6–28
WCDMA IV (1700) frequencies ....................................................................................................................... 6–29
WCDMA VIII (900) frequencies ....................................................................................................................... 6–30
List of Tables
Table 14 Nominal voltages .................................................................................................................................... 6–9
Table 15 I2C bus configurations ........................................................................................................................ 6–16
List of Figures
RX-51
System Module
Issue 1 COMPANY CONFIDENTIAL Page 6 –3
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