Modular Structure - Nokia 9000i Service Manual

After Sales
Technical Documentation

Modular Structure

The transceiver consists of the following modules:
GE8/GE9 – Transceiver modules for PCN and GSM
GP1 – Personal Digital Assistant module
GK2 – Combined User interface module (CMT/PDA)
GEM1 – SIM and audio module (CMT)
In addition, the CMT baseband contains multichip modules (MCM) that
are in fact submodules but should be considered as components for the
CMT unit.
The LCD module(GK2) consists of a CMT U/I module and a graphic LCD
module for the PDA. GK2 contains an insert for an antenna; this Antenna
is by default a helix with a joint but can be replaced with a whip type.
The CMT and PDA modules are assembled inside the same covers and
connected via a board to board connector. The LCD module and antenna
are installed in the lid part which is in turn connected to the main part with
a hinge; the LCD module being connected to the PDA module through the
hinge with a flexible flat cable. The antenna is connected to the CMT
module via coax cable.
The SIM flex module contains the SIM card holder, the buzzer, and the
standard handset acoustic components, i.e., microphone and earpiece, on
a flex carrier. Handsfree audio components, i.e., microphone and
speaker, are assembled in cavities in a magnesium chassis and
connected on the PDA via a pair of cables.
In addition the NOKIA 9000 has a dedicated attachable Li Ion battery and
contains 2 cells with 730 mAh capacity (1Q/96) plus necessary protection
circuitry with external connector.
The CMT module is covered by EMC/EMI shields, i.e., magnesium
chassis and metallized plastic shield, of which the chassis is also
extended to cover critical parts of the PDA module, e.g., switched mode
power supply (SMPS) and infra–red (IR) transceiver circuit. A simplified
functional diagram of the modular structure is illustrated below. The
figure also includes the unit's external interfaces.
Original, 08/96
RAE/RAK–1N
Overview
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