SECTION ‘C’ - Problems and Cures
Symptom
Possible cause and remedy
No sound.
•
Re-check all connections. Check diagrams.
•
Amplifier not switched on. Switch on at mains socket. Press mains rocker
switch. Check green light is on.
•
Microphone not plugged in or other audio source not connected.
•
Hearing aid not on “T/MT” or “T” facility not working.
Low sound.
•
Microphone too far from sound.
•
Loop cable wired incorrectly. Check diagrams.
•
Volume control set too low. Turn up volume on amplifier.
•
Radio or TV volume set too low. Turn up volume on Radio or TV.
Distorted sound
•
Volume control set too high. Turn down volume on amplifier.
•
Radio or TV volume set too high. Turn down volume on Radio or TV.
•
Move microphone away from loud speaker.
•
Microphone plug/lead damaged.
Background noise
(hum or buzz)
•
If noise remains when loop amplifier is turned off but hearing aid is still on “T”,
this is interference caused by other equipment such as TV, fluorescent lights or
dimmer switches. With the loop amplifier turned off and the hearing aid still on
“T” turn items off in turn until the noise goes away.
•
If noise goes when the loop amplifier is turned off it may be a fault in the
system, a damaged microphone lead or noise being picked up by the
microphone.
If in doubt please contact your dealer for assistance.
SECTION ‘D’ - Specification
Power Supply
•
220-240 V AC 20VA Max via integral mains lead.
Controls
•
Rotary
VOLUME
control to vary the output level.
•
POWER ON/OFF
rocker switch.
Input connections
•
2 microphone inputs
.
3.5mm mono jack plug. DC powered for electret
microphones, located on front of the amplifier.
•
Aux In
DIN
socket located on the rear of the amplifier, socket wired for signals
in on pins 3 & 5 and ground on pin 2. This for direct connection to a TV sound
output or other audio source via SCART or other suitable socket.
Output connections
•
Push grip connectors for loop cable or loop pad (Labelled:
Loop Cable
). Loop
will give full output with loop resistance between 1.0 and 2.5 Ohms.
Loop output
•
1.4A output current @ 100-5kHz. Sufficient to meet BS6083 pt4 (IEC118-4) in
a loop not exceeding 6.25m(20ft) in width for most domestic situations.
Loop cable
•
Two turn loop cable. Standard system supplied with 37m(120ft) 12/0.2
(0.4mm²) two core PVC insulated cable and cable clips. Minimum cable length
11m = 1.0 Ohms.
Indicators
•
Illuminated
“GREEN ROCKER SWITCH” for Power On
indication.
Product conforms to the provisions of the following European Union Directives :
•
73/23 Low Voltage Directive
•
89/336 & 92/31 Electro Magnetic Compatibility Directives
•
93/68 CE Marking Directive
is a mark of Sarabec Ltd.
©
Sarabec Ltd 12x-xxx.002 1098 LA2c .doc
®
Home Loop System/Loop Pad System
Model LA2c
Owner’s Manual
Introduction
The Sarabec LA2c Home Loop System provides a practical solution for hearing aid users to
listen more easily to their TV or Audio equipment via the “T” or “MT” facility of their aid.
With no direct connection between the user and the TV the user is able to move freely within
the looped area and listen comfortably to the TV or other equipment.
The Home Loop System is used in conjunction with a hearing aid with a switch position
marked "T" or "MT", this is found on most 'behind the ear' hearing aids. The system picks
up the sound from the TV via a microphone and feeds it to the amplifier. The amplifier
passes the sound to a loop of wire around the listening area, which in turn transmits the
sound inductively, “magnetic sound waves”, to the hearing aid. The user may then adjust the
loop volume to suit their own hearing preference without affecting other people.
The Home Loop System is supplied with Loop Cable to be placed around a room that you
want to listen in. The Loop Pad System is an alternative to the standard Home Loop System
creating either a portable loop system or a localised system where adjacent loop systems
could interfere with each other.
The Home Loop System is supplied ready for use with the following items.
1.
LA2c Loop Amplifier.
2.
Mains lead with fitted plug.
3.
Microphone with Velcro™ pads
4.
37m(120ft) Loop Cable and pack of 50 cable clips
or
Loop Pad with 5m(15ft) connecting cable
5.
Guarantee Card
6.
Owners manual
Sarabec Limited 15 High Force Road Middlesbrough TS2 1RH UK
Telephone (01642) 247789 Fax (01642) 230827 Text (01642) 251310
