Nokia 7230, Service Manual

Page: 137 / 166

Table of Contents
Introduction ............................................................................................................................................................ 5–5
Phone description ............................................................................................................................................. 5–5
Energy management .............................................................................................................................................. 5–8
Battery and charging ........................................................................................................................................ 5–8
Normal and extreme voltages ......................................................................................................................... 5–9
Power key and system power-up .................................................................................................................... 5–9
Modes of operation ........................................................................................................................................ 5–10
Clocking scheme ............................................................................................................................................. 5–10
Connectivity ......................................................................................................................................................... 5–10
MicroUSB interface ......................................................................................................................................... 5–10
SIM interface ................................................................................................................................................... 5–11
MicroSD card interface ................................................................................................................................... 5–11
USB interface ................................................................................................................................................... 5–11
Charger interface ............................................................................................................................................ 5–12
Bluetooth ........................................................................................................................................................ 5–13
FM radio ........................................................................................................................................................... 5–13
User interface ....................................................................................................................................................... 5–14
Display module ............................................................................................................................................... 5–14
Keyboard interface ......................................................................................................................................... 5–15
Backlight and illumination ............................................................................................................................ 5–15
Slide switch interface ..................................................................................................................................... 5–16
Camera concept ................................................................................................................................................... 5–17
Camera interface ............................................................................................................................................ 5–17
Audio concept ...................................................................................................................................................... 5–17
Audio concept ................................................................................................................................................. 5–17
Internal microphone ...................................................................................................................................... 5–18
Internal earpiece ............................................................................................................................................ 5–19
IHF speaker ..................................................................................................................................................... 5–19
External microphone ...................................................................................................................................... 5–20
External earpiece ............................................................................................................................................ 5–20
Vibra ................................................................................................................................................................ 5–21
AV connector ................................................................................................................................................... 5–22
Combo memory ................................................................................................................................................... 5–23
RF description ...................................................................................................................................................... 5–23
Block diagram ................................................................................................................................................. 5–23
Receiver (RX) ................................................................................................................................................... 5–24
Transmitter (TX) ............................................................................................................................................. 5–24
List of Tables
Table 13 Nominal voltages .................................................................................................................................... 5–9
Table 14 AV connector pins ................................................................................................................................ 5–22
List of Figures
Figure 27 Battery pin order ................................................................................................................................... 5–8
Figure 28 MicroUSB connector ........................................................................................................................... 5–10
Figure 29 SIM interface ....................................................................................................................................... 5–11
Figure 30 MicroSD card interface ....................................................................................................................... 5–11
Figure 31 USB interface ....................................................................................................................................... 5–12
RM-598; RM-604
System Module
Issue 1 COMPANY CONFIDENTIAL Page 5 –3
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