Audio DCHLD3 Operation manual
Home Loop
DCHLD3 Hearing Loop Driver
Installation &
User Guide
May 2017
Contents
Product Overview
Components
Recommended Tools
Installation Instructions
Connections
Hearing Loop Driver Front Panel
Hearing Loop Driver Rear Panel
Using the System
Maintenance
Troubleshooting
3
3
4
4
6
7
8
9
9
10
Contacta has a policy of continuous product development, therefore small specication changes
may not be reected in this manual. Images, labels, packaging, accessories and product colours
are subject to change without notice.
3
Product Overview
Our Home Loop is a sleek and powerful hearing loop driver that
connects to televisions, music systems, and other audio devices.
It enables hearing device wearers to listen wirelessly and directly
from a sound source. Integrated clear audio processing gives the user
outstanding sound quality, enhancing speech and music clarity.
Components
1. Hearing Loop Pad
2. Installation & User Guide
3. Rubber Feet x 4
4. HLD3 Hearing Loop Driver
5. Reel of Cable
6.
7.
8.
9.
10.
Power Supply
Boundary Microphone
IEC Lead
Optical Cable
Auxiliary Cable
1
2
34
5
6
7
8
9 10
4
Recommended Tools
Installation Instructions
• Suitable cable xings such as gaer tape or cable clips.
• 3mm at head screwdriver for adjusting high frequency
compensation.
Installing the Hearing Loop Pad
The hearing loop pad should be installed on the seat used most
frequently by the hearing device user.
Installation:
1. Place the hearing loop pad underneath the seat that the hearing
device user will sit in. Ideally, it should be positioned under the
chair cushion, xed underneath the chair, or placed on the oor.
2. Route the wire to the hearing loop driver and x it around the edge
of the room.
Use suitable xings such as gaer tape or cable clips to ensure
the wire does not act as a trip hazard.
3. See page 6 for information on how to connect the hearing loop
pad cable to the hearing loop driver.
Hearing loop pad placed underneath
the cushion of the chair.
Hearing loop pad xed underneath the
chair or placed on the oor.
!
5
Installing the Hearing Loop Cable
Hearing loop cable around the base of the sofa/chair to form a loop.
Hearing loop cable shaped around the perimeter of the room.
If there is more than one person using the hearing loop, or you wish to
use the hearing loop in multiple locations within the room, the hearing
loop cable will be more suitable as it creates a larger magnetic eld.
The hearing loop cable can be installed either around the room or
around certain pieces of furniture.
Installation:
1. Lay the hearing loop cable around either the perimeter of the room
or around the sofa/chair.
2. Ensure both ends of the cable reach the hearing loop driver and
can be connected easily.
3. Fix down the hearing loop cable, ideally under the carpet.
Use suitable xings such as gaer tape or cable clips to ensure
the hearing loop cable does not act as a trip hazard.
4. See page 6 for information on how to connect the hearing loop
cable to the hearing loop driver.
!
6
Connections
Connect both ends of the wire to the loop terminals on the driver as in
the diagram below. Either wire can be connected to either terminal.
Hearing Loop Pad Cable
Hearing Loop Cable
7
There are 3 LED indicators on the front panel.
1 2 3
1. Power
The Power indicator will light up when the hearing loop driver has
been switched on and has power connected to it
When there is no input signal, the indicator will ash once every
minute.
2. Input
This indicator will light up when audio is coming through the loop
from an audio source such as a television or music system.
3. Output
When there is audio being driven through the loop, the output
indicator will light up.
The indicator will either ash or remain constant, depending on the
level.
The output indicator will ash continuously when a loop is not
connected.
Hearing Loop Driver Front Panel
8
1. Power
2. Hearing Loop Connection
3. Optical/Digital In
4. High Frequency Compensation
Optical Cable
If your television/sound source has an optical output available, use the
optical cable to connect it to the driver’s Optical/Digital In (3 in the
diagram above). The Line Out jack (5 in the diagram above) is driven
only from the optical cable input. The HLD3 accepts PCM digital audio.
HLD3 TV/Sound
Source
5 6
4
3
2
1
Auxiliary Cable
If your television/sound source doesn’t have an optical output
available, use the auxiliary cable to connect it to the driver’s Line In (6
in the diagram above).
HLD3 TV/Sound
Source
High Frequency Compensation
Metal loss occurs when a large amount of metal in the surrounding
area aects your hearing loop’s higher audio tones. To adjust for this,
turn the HF Comp adjuster (4 in the diagram above) clockwise until the
higher pitched sounds are at a suitable strength.
5. Line Out (only follows signal
from the Optical/Digital In)
6. Line In
7. Microphone
7
Hearing Loop Driver Rear Panel
9
Using the System
1. To turn on the HLD3, turn the volume control knob (on the right of
the front panel) clockwise until the power indicator lights up.
2. Move to the position of the hearing loop. If using a hearing loop
pad, sit on the chair with the pad installed underneath.
3. Switch the hearing device to the “T” position or turn on the loop
listener, then turn on the audio source.
4. Audio is picked up by the telecoil in the hearing device.
5. Adjust the volume on the hearing loop driver as necessary. The
audio source volume control will not change the volume heard by
the hearing device.
There’s nothing more you need to do!
7. Turn the volume control knob anti-clockwise until it clicks to power
o when the Home Loop is not being used.
Maintenance
To keep the system at its peak performance, the following procedures
should be carried out on a regular basis:
• Ensure all connectors are rmly inserted into their sockets.
• Do not stretch cables.
• Clean the driver and the microphone with a dry soft cloth/
cleansing wipes. Do not use solvent based cleaners.
• Do not allow cleaning uids to enter the driver or back ports/vents
of the microphone.
10
Symptom Possible Fault Action
No power
detected in the
hearing loop driver
/ power indicator
isn’t illuminated.
1) Power cable not plugged in or
faulty.
2) Faulty power supply unit.
3) Plug fuse has blown.
4) Driver has a fault.
1) Check power cable is rmly
plugged in.
2) Change the power supply unit.
3) Change the plug fuse. If
it blows again, contact your
dealer.
4) Contact your local dealer.
Input light isn’t
illuminated.
1) Sound source isn’t powered
on.
2) Input disconnected.
3) Driver has a fault.
1) Make sure the television or
sound source is switched on.
2) Ensure either the optical out
or line out is connected to the
HLD3 from the audio source.
3) Contact your local dealer.
Output light isn’t
illuminated.
1) Volume is too low.
3) Hearing loop pad or
cable incorrectly installed or
disconnected.
3) Driver has a fault.
1) Turn up the volume on the
driver.
3) See page 4 and ensure all
installation instructions have
been followed carefully.
3) Contact your local dealer.
No audio is heard
through the
hearing loop.
1) Volume is too low.
2) If using a hearing loop pad,
the hearing device user isn’t
seated above the hearing loop
pad.
3) Hearing loop pad or
cable incorrectly installed or
disconnected.
4) Driver has a fault.
1) Adjust the volume on the
driver and on the hearing device.
2) Make sure the hearing device
wearer is seated where the
hearing loop pad is located.
3) See page 4 and ensure all
installation instructions have
been followed carefully.
4) Contact your local dealer.
Troubleshooting
11
Symptom Possible Fault Action
Interference
(buzzing/
whistling/hissing)
is heard through
the hearing loop.
1) Incorrect power supply is
being used.
2) Unscreened or poorly earthed
third party equipment is being
used in close proximity.
1) Ensure that the supplied
grounded power supply is being
used.
2) Switch o any third party
equipment to identify the source
of interference.
No sound when
using headphones.
1) The optical input isn’t being
used.
2) Driver has a fault.
1) This function is only available
when using the optical input.
2) Contact your local dealer.
If you are still experiencing problems, please contact your local dealer.
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