Trouble-Shooting; The Unit Is Not Working; Hum; Noise - ASR Mini-Basis MK II Manual

ASR Audio Systems Friedrich Schaefer, D- 35 745 Herborn +49 (27 72) 42 905
4.0

Trouble-shooting

4.1

The unit is not working

Please check if the two Leds inside the main unit are shining.
If not please check if the power cable is connected correctly to the Mini Basis and the power outlet.
Also you may check the fuse in the little drawer at the power cable connector at the Mini Basis.
When the Leds are shining please check the cables and your cartridge.
4.2

Hum

To avoid hum the ASR Mini-Basis should not be placed near power supplies, televisions, video
equipment, AM/FM-receivers, cordless phones, computers etc. Also do not route the input or
output cables parallel to the power cord. Hum can occur because of a ground loops caused by
multiple grounding of the cartridge/tone arm/ amplifiers. Please try to reverse the plug of the
power cord. That may interrupt the ground loop. Also try different ways of grounding.
4.3

Noise

If noise occurs while playing an LP, you should lower the gain. The noise at the cartridge's
internal resistance of a very low output MC cartridge might be already higher, than the noise
of the input stage of the ASR Mini Basis!
4.4 Different channel volumes during phono playback
Please check if all DIP switches are set in the same way for both channels and are positioned
into their places properly.
4.5

Just in case: repair

If all the help we provided in this trouble-shooting-section of the manual did not help to make
the ASR Mini-Basis operate properly, please contact your authorized ASR dealer.
Please pack the units into the original ASR boxes and with the original ASR packing accessories.
Your authorized ASR dealer will take care of your unit and will repair it properly.
Phono-Pre-Amplifier ASR Mini-Basis MK II Page 5