Nokia 2110i, 2110 TRANSCEIVER 07
TRANSCEIVER
NHE–4
9622ARo
Technical Documentation
Contents of Transceiver
Transceiver NHE–4 7–2
Introduction 7–2
Functional Description 7–2
Interconnection Diagram 7–3
Exploded View of NHE–4NX 7–4
Assembly Parts of NHE–4NX 7–5
Exploded View of NHE–4NY 7–6
Assembly Parts of NHE–4NY 7–7
Exploded View of NHE–4AX 7–8
Assembly Parts of NHE–4AX 7–9
Exploded View of NHE–4BX 7–10
Assembly Parts of NHE–4BX 7–11
7–1
Copyright Nokia Mobile Phones
TRANSCEIVER
NHE–4
Transceiver NHE–4
Related Documentation
Introduction
The NHE–4 is a radio transceiver unit for the GSM network. It is GSM power
class 4 transceiver providing 11 power levels at a maximum power of 2 W.
The transceiver consists of three modules: system module, user interface module and mechanics.
9622ARo
Technical Documentation
6E 0260294 Mechanics of NHE–4NX
6E 0260494 Mechanics of NHE–4NY
6E 0260292 Mechanics of NHE–4AX
6E 0260293 Mechanics of NHE–4BX
7–2
Copyright Nokia Mobile Phones
The plug–in SIM (Subscriber Identity Module) card reader is located inside the
phone.
Functional Description
The transceiver electronics consist of radio module (system + RF blocks) and
UIF module. UIF module is connected to radio module with a connector. System blocks and RF blocks are interconnected with PCB wirings. Transceiver
can be connected to accessories with a bottom system connector, which includes charging and accessory control.
The system blocks provides MCU and DSP environments, logic control IC
(ASIC), memories, audio processing and RF control hardware (RFI). On board
power supply circuitry delivers operating voltage for both system and RF
blocks.
The micro controller unit, Hitachi H8/536, communicates with DSP, memories
and logic control IC (ASIC/D2CA) with 8 bit data bus.
RF block is designed for a handportable phone; which operates in GSM system. Purpose of the RF block is to receive and demodulate radio frequency signal from the base station and to transmit a modulated RF signal to the base
station.
TRANSCEIVER
NHE–4
9622ARo
Technical Documentation
Interconnection Diagram
SIM Display
524
2
MIC
UI – MODULE
7–3
Copyright Nokia Mobile Phones
2
EARPIECE
2
BUZZER
RADIO – MODULE
16 2+2 2
SYSTEM
CONNECTOR
30
4
BATTERY
CHARGER ANTENNA
TRANSCEIVER
NHE–4
9622ARo
Technical Documentation
Exploded View of NHE–4NX
7–4
Copyright Nokia Mobile Phones
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