Nokia 2220 Servicehandbuch
CCS Technical Documentation
System Module
RH-42
Issue 2 09/2003
Nokia Corporation Confidential
Page 11
• storage temperature range: -40 to + 85
o
C
All of the EIA/TIA-136-270A requirements are not exactly specified over the temperature
range. For example, the RX sensitivity requirement is 3dB lower over the –30 - +60
range. For example, the RX sensitivity requirement is 3dB lower over the –30 - +60
°C
range.
Engine Module
Baseband Module
The core part of the transceiver’s baseband (see the figure below) consists of two ASICs
— the UEM and UPP — and flash memory. The following sections illustrate and explain
these parts in detail.
— the UEM and UPP — and flash memory. The following sections illustrate and explain
these parts in detail.
Figure 2: System Block Diagram
UEM
UPP
EAR
MIC
BUZZER
RF Supplies
BATTERY
PA supply
LCD
CBUS/DBUS
BB Supplies
SLEEPCLOCK
32kHz
FLASH 16Mbit
MEMADDA
MEMCONT
RF IC
RFCLK
19.44MHz
BASEBAND
DCT4 System Connector
EXTERNAL AUDIO
CHARGER CONNECTION
KLIGHT/
DLIGHT
PWR ON
AUDIO
PURX
RFIC CTRL
RF RX/TX
RF RX/TX