10
Troubleshooting
Verify the control LEDs following the instructions in this installation guide. Use Univox®
Listener to check the sound quality and basic level of the loop. If the loop driver does not
perform satisfactory, check the following:
• Does the mains power indicator light? If not, maek sure that the transformer is
correctly connected to the power outlet and to the driver.
• Is the loop current indicator lit? This is a guarantee that the system works. If not, check
that the loop pad is not broken and correctly connected, and make sure to check all
other connections.
• Attention! If headphones are connected the loop current indicator is disabled.
• The loop current indicator lights but there is no sound in the hearing aid/headphones:
check that the M-T-O switch of the hearing aid is in T or MT mode. Also check the status
of your hearing aid batteries.
• Bad sound quality? Adjust the loop current, bass and treble controls. Bass and treble
adjustment should normally not be needed.
Make sure that Listener is turned on (red LED flashes). If not, change the batteries. Please
make sure that the batteries are inserted correctly. If the loop receiver sound is weak,
make sure that Listener is hanging/hold in vertical position. Adjust volume if necessary.
Weak signal might indicate that the loop system doesn’t comply with the international
standard IEC 60118-4.
Should the system not work after having made the product test as described above, please
contact your local distributor for further instructions.
Measuring devices
Univox® FSM Basic, Field Strength Meter
Instrument for professional measurement and
control of loop systems according to IEC 60118-4.
Univox® Listener
Loop receiver for fast and simple check of the
sound quality and basic level control of the loop.
Univox® Listener
Univox® FSM Basic
