Nokia 3555, Service Manual

Page: 135 / 158

Table of Contents
Introduction ............................................................................................................................................................ 5–5
Phone description ............................................................................................................................................. 5–5
Energy management .............................................................................................................................................. 5–9
Battery interface ................................................................................................................................................ 5–9
Normal and extreme voltages ...................................................................................................................... 5–10
Power key and system power-up ................................................................................................................. 5–10
Modes of operation ........................................................................................................................................ 5–10
Clocking scheme ............................................................................................................................................. 5–11
USB, SIM, µSD ........................................................................................................................................................ 5–11
USB ................................................................................................................................................................... 5–11
SIM interface ................................................................................................................................................... 5–12
µSD card interface .......................................................................................................................................... 5–13
Camera .................................................................................................................................................................. 5–13
User interface ....................................................................................................................................................... 5–13
Display module ............................................................................................................................................... 5–13
Keyboard and other keys ............................................................................................................................... 5–13
Backlight and illumination ............................................................................................................................ 5–15
Fold switch ...................................................................................................................................................... 5–15
Audio concept ...................................................................................................................................................... 5–15
Audio concept ................................................................................................................................................. 5–15
UHJ/AV connector ........................................................................................................................................... 5–16
Bluetooth ............................................................................................................................................................. 5–17
GPS interface (RM-257 only) ............................................................................................................................... 5–17
RF description ...................................................................................................................................................... 5–18
Receiver (RX) ................................................................................................................................................... 5–18
Transmitter (TX) ............................................................................................................................................. 5–19
List of Tables
Table 9 Nominal voltages ................................................................................................................................... 5–10
List of Figures
Figure 22 Battery pin order ................................................................................................................................... 5–9
Figure 23 Small (left) and wide (right) charger plugs ........................................................................................ 5–9
Figure 24 SIM interface ....................................................................................................................................... 5–12
Figure 25 Keyboard layout ................................................................................................................................. 5–14
Figure 26 Side keys .............................................................................................................................................. 5–14
Figure 27 Audio block diagram .......................................................................................................................... 5–16
Figure 28 Bluetooth interface ............................................................................................................................ 5–17
Figure 29 Block diagram of the GPS system ..................................................................................................... 5–18
RM-257; RM-270; RM-277
System Module
Issue 1 COMPANY CONFIDENTIAL Page 5 –3
Copyright © 2007 Nokia. All rights reserved.