User Guide

After Sales
Technical Documentation
Compact Handsfree Unit PHF–2
Page 5Original, 11/94
Introduction
The PHF–2 Compact Handsfree Unit forms a major part of the Compact
Handsfree Car Kit; the kit provides a simple–to–install, low cost handsfree
facility for in–car use.
The BABT approved version of PHF–2 is known as PHF–2X. Since both
units are technically identical, all references to PHF–2 equally apply to
PHF–2X.
Technical Summary
PHF–2 allows both handsfree (hf) and normal handset (hs) use of the
phone. Handset use is possible with the curly system cable which
includes an antenna cable. Detection of hf and hs operation is achieved
by a reed–switch located in the PHF–2 plug which detects the presence of
a magnet inside the MBH–9 holder.
The phone is connected to the unit via a system connector (fitted to the
end of the curly system cable). There are also connectors for an external
power source, for a standard hf–microphone and for an external antenna
which must be used with this configuration.
The Compact Handsfree Unit consists of speaker and microphone
amplifiers, power on/off –logic, hf–speaker muting and a constant current
switching regulator for charging the phone battery. The unit has an inbuilt
hf–speaker and an external hf–microphone but the actual handsfree
function is generated in the phone.
The
MPHF2 mechanics comprise the front and rear covers, speaker
clamp, the holder cover, screws, type label, and system cable with
rf–cable.
PHF–2 is installed inside the vehicle using a separate mounting plate
(MKE–1). Depending upon the version of car kit being installed, the
PHF–2 unit is supplied with/without the MBH–9 holder already fitted to the
front of the PHF–2 unit.
List of Modules
Table 1. List of Modules
NAME OF MODULE TYPE
CODE
MATERIAL
CODE
NOTES
HF Speaker Module DH3N 0200599
Assembly Parts
PHF–2
MPHF2 0260340
Installation Kit PHF–1/M 0260254