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 switch.
Check green LED 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
Loop Volume control too high. Turn volume down.
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 stops when the loop amplifier is turned off there may be a fault in the
system or microphone lead or noise is being picked up by the microphone.
If in doubt please contact your dealer for assistance.
SECTION ‘D’ - Specification
Power Supply
230 V AC 20VA Max via Fig 8 mains lead.
Controls
Rotary
VOLUME
control to vary the output level.
Rotary
TONE
control to vary the output tone.
ON/OFF
push button switch.
Input connections
2 microphone inputs
A/B.
3.5mm mono jack plug. DC powered for electret
microphones.
Aux In Left/Right
line input. Phono/RCA sockets. 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 0.5 and 1.5 Ohms.
Loop output
2.85A 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
Single turn loop cable. Standard system supplied with 37m(120ft) 24/0.2
(0.75mm²) single core PVC insulated cable and cable clips. Minimum cable
length 11m = 0.5 Ohms.
Indicators
Green Light Emitting Diode (LED) 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
is a mark of Sarabec Ltd.
Sarabec Ltd
134-x1x.002 0304 LA110.doc
®
Home Loop System/Loop Pad System
Model LA110
Owner’s Manual
Introduction
The Sarabec LA110 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.
LA110 Loop Amplifier.
2.
Mains lead with fitted plug.
3.
Microphone with Velcro™ pads
4.
SCART to Phono direct connection lead
5.
37m(120ft) Loop Cable and pack of 50 cable clips
or
Loop Pad with 5m(15ft) connecting cable
6.
Guarantee Card
7.
Owners manual
Sarabec Limited 15 High Force Road Middlesbrough TS2 1RH UK
Telephone (01642) 247789 Fax (01642) 230827 Text (01642) 251310