Nokia 6020b Service Manual
RM-31
Nokia Customer Care
7 - System Module
10
COMPANY CONFIDENTIAL
Issue 1 03/2005
Copyright © 2005 Nokia. All Rights Reserved.
Baseband
The RM-31 product is a DCT4.5 Classic Value segment phone. There are two variants: A
GSM850/1800/1900 phone and an EU variant, RM-30, with EGSM900/GSM1800/GSM1900.
GSM850/1800/1900 phone and an EU variant, RM-30, with EGSM900/GSM1800/GSM1900.
The HW has the following features:
• GPRS and HSCSD with EDGE in up to (2RX + 2TX) (MCS5), without EDGE also
in (3RX + 1TX) (MCS6)
in (3RX + 1TX) (MCS6)
• DCT4 with AMR and 16 MIDI tones
• 128/16 Mbit Combo memory
• Amazon Active display with 64k colours
• Battery BL-5B
• PopPort
TM
interface
• 5-way navigation key with select
• VGA Camera
• Vibra
• IHF
The RM-31 BB is based on the DCT4/4.5 engine and is compatible to the PopPort
TM
accesso-
ries. The DCT4/4.5 engine consists basically of two ASICs. The UEMEK (Universal Energy
Management IC including voltage regulators, charge control and audio circuits, audio IFH am-
plifier from DCT4.5) and the UPP (Universal Phone Processor including MCU, DSP and RAM
from DCT4).
Management IC including voltage regulators, charge control and audio circuits, audio IFH am-
plifier from DCT4.5) and the UPP (Universal Phone Processor including MCU, DSP and RAM
from DCT4).