Contacts Description - Nokia NSE-6 SERIES Service Manual

NSE–6
System Module

Contacts Description

The transceiver electronics consist of the Radio Module ie. RF + System
blocks, the keyboard PCB, the display module and audio components.
The keypad and the display module are connected to the Radio Module
with connectors. System blocks and RF blocks are interconnected with
PCB wiring. The Transceiver is connected to accessories via charger con-
nector (includes jack and plates), headset connector and IR–link.
The System blocks provide the MCU, DSP and Logic control functions in
MAD ASIC, external memories, audio processing and RF control hard-
ware in COBBA ASIC. Power supply circuitry CCONT ASIC delivers oper-
ating voltages both for the System and the RF blocks.
The RF block is designed for a handportable phone which operates in the
GSM system. The purpose of the RF block is to receive and demodulate
the radio frequency signal from the base station and to transmit a modu-
lated RF signal to the base station. The SUMMA ASIC is used for VHF
and PLL functions. The CRFU ASIC is used at the front end.
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PAMS
Technical Documentation
Original 08/98