UM30, UM60, UM90 User Manual
Troubleshooting
No power LED on control panel
Ensure IEC lead, mains switch and inlet fuse
If 24Vdc power input is being used, check battery is charged
Power LED is on but no other LEDs
and no output
Check input signals and condition of input connection leads
Check MASTER, MIC, LINE IN or MEDIA controls are turned up
Power light and output LEDs lighting
but no output
Check speaker output terminals are connected correctly
Check speakers are working (test on another amp if available)
Bluetooth cannot connect
Ensure that the sending device is within Bluetooth range (5-10m)
Check that the connected device is the correct ID
No audio from connected Bluetooth
device
Ensure that volume controls are not turned down on sending device
Check volume and Play/Pause buttons in case Bluetooth is muted
USB player will not play audio from
media
Press PLAY on transport controls
Check memory device is connected properly (remove and re-insert)
Check file types
–
standard compressed digital audio files required
Check memory device works on a PC or Mac for standard playback
Output is very loud or distorted
Check level of input signal is not too high
Reduce MIC, LINE IN, MEDIA and/or MASTER level
Ensure Hi-Z line level input(s) not connected via MIC input
Output is working but at very low
level
Check input audio source level is not too low
Increase MIC, LINE IN, MEDIA and/or MASTER level
Check for quiet recording of media files on USB
Feedback from microphone
Face microphone away from speakers and monitors
Turn down MIC and/or MASTER level
Amplifier overheating or cutting out
Check that
8Ω speakers are not connected to 100V terminals
Ensure total 100V speaker wattage is lower than amplifier rating
Ensure that 100V
and 8Ω speakers are not both connected
Disposal:
The “Crossed Wheelie Bin” symbol on the product means
that the product is classed as Electrical or
Electronic equipment and should not be disposed with other household or commercial waste
at the end of its useful life. The goods must be disposed of according to your local council guidelines.
Hereby, AVSL Group Ltd. declares that the radio equipment type 953.173UK, 953.176UK and 953.179UK are in
The full text of the EU declaration of conformity for 953.173UK is available at the following internet address:
http://www.avsl.com/assets/exportdoc/9/5/953173UK%20CE.pdf
The full text of the EU declaration of conformity for 953.176UK is available at the following internet address:
http://www.avsl.com/assets/exportdoc/9/5/953176UK%20CE.pdf
The full text of the EU declaration of conformity for 953.179UK is available at the following internet address:
http://www.avsl.com/assets/exportdoc/9/5/953179UK%20CE.pdf
Errors and omissions excepted. Copyright© 2021.
AVSL Group Ltd. Unit 2-4 Bridgewater Park, Taylor Rd. Manchester. M41 7JQ
AVSL (EUROPE) Ltd, Unit 3D North Point House, North Point Business Park, New Mallow Road, Cork, Ireland
