Phone Description - Nokia RM-237 Service Manual

RM-237
System module

Phone description

Introduction
This chapter describes the system module including engine, power management, interfaces, audio etc.
The baseband is based on BB5.0 with a RAPGSM main processor and Retu/Tahvo energy management. All
blocks that require high voltage process are in Tahvo and all other in Retu. The RF part is based on the ASIC
Ahne.
RM-237 is a monoblock phone, in which all electrical components are assembled into one PWB.
RM-237 operates on the GSM 900/1800/1900 bands.
Key components
Function
Energy management
Main processor
Memory
RF ASIC
Front end module
Antenna
System connector
Battery
Bluetooth
FM radio
IHF Speaker
Earpiece
Microphone
Vibra
Charger connector
Camera
HWA
Display
LED driver
RTC battery
Issue 1
Retu
Tahvo
RAPGSM
Combo: 128 Mbit SDRAM & 256 Mbit NOR flash
Ahne
Power amplifier and Antenna Switch
Antenna module assembly
RM-237: 900/1800/1900MHz
AV connector
mini USB connector
BL-5C, 3.7 V, 860 mAh
BC4-ROM
TEA5760
Donau or Aura (in antenna module assembly)
RDF-07A 32OHM 10.86x7.40.2.2
Clapton
SMD VIBRA MOTOR
2 mm Nokia charger interface
1.3Mpix Konica
STV0984N
SEID or AUO 128X160
TPS 61061 YZFR
311 size
COMPANY CONFIDENTIAL
Copyright © 2007 Nokia. All rights reserved.
Name
Nokia Customer Care
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