User Guide

INSTALLATION
INSTRUCTIONS
9617ARo
4–7
NHC–4
Technical Documentation
Copyright  Nokia Mobile Phones
Holder Unit (MCH–8)
The holder unit MCH–8 is used for attaching the phone to the vehicle. It pro-
vides connections to external antenna and junction box HFJ–3. Holder unit will
be attached in the vehicle by using mounting plate or swivel mount.
Junction Box (HFJ–3)
Handsfree junction box HFJ–3 provides connections between different function-
al parts of the car installation, supply feed, handset, holder unit and auxiliary
connections. It is attached to the vehicle with mounting plate MKE–1, or swivel
HHS–1.
Supply feed is coming directly from vehicle battery via power cable PCH–4.
Junction box provides supply feed for handset and handheld phone. It also in-
cludes charger for charging the battery of the phone.
Optional handset HSU–1 is connected to the 8 pin modular female connector
HANDSET/ACCESSORY located in the edge of the junction box. If the junction
box is installed far away from the handset or holder unit, extension cable
SCE–4 should be used.
The cable from holder unit is connected to the other 8 pin female connector
HOLDER next to handset connector.
Handsfree microphone and loudspeaker have male plugs, which are connected
to their female counterparts in the junction box. The diameters are 2.5 and 3.5
mm respectively. Connectors are marked MIC and SPEAKER.
Handsfree Microphone and Speaker (HFM–4 and HFS–6)
The system consist of two components, the microphone HFM–4 and loud-
speaker HFS–6.
The handsfree microphone can usually be installed on the sunvisor or A–pillar.
The main idea is to get the microphone as close to the mouth as possible, and
to attach the microphone to a surface that is mechanically quiet. The micro-
phone connects to the HFJ–3 MIC jack.
The loudspeaker should be mounted at least 3 ft/1 m away from the handsfree
mic to avoid acoustic feedback The loudspeaker connects to the HFJ–3
SPEAKER jack.