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No Power
1.
Check the ASM5D is connected to the mains with an appropriate mains lead.
2.
Check the AC outlet is switched on.
3.
Check the ASM5D is switched on.
Check the FUSE in both the mains lead and the ASM5D's IEC connector fuse holder have
not failed.
If Yes ‐ Replace with the same size and rating of fuse. If a replacement fails, investigate
4.
the reason, referring to a qualified engineer if necessary.
If No ‐ Check the blue power LED is illuminated, if illuminated check the level controls
and audio sources are set correctly.
No Sound
1.
Check the MASTER level is properly adjusted.
2.
Check the channel levels (MIC/LINE1, 2 & AUX) are properly adjusted.
Check the audio source is it switched on and working correctly.
Make sure the connecting cables are in good order and connected at both ends.
3.
Make sure the output volume (gain) of the connected device is turned up sufficiently to
drive the inputs of the ASM5D.
Poor/Distorted Sound
1.
Follow the procedures for setting the levels in the Quick Start Guide (4. Levels)
2.
Make sure all input cables are in good order.
3.
Make sure all input connections are plugged in completely and are not loose.
Noise
1.
Check all connections to the ASM5D are good
Check that none of the audio signal cables are routed near the following :‐
2.
Mains leads, Power transformer, Amplifiers or any other EMI inducing devices.
Check that there are no lighting dimmers/controllers on the same mains power circuit.
3.
If Yes, use a power filter or a different mains power circuit if available.
Hum
Turn the MASTER level down.
If the noise/hum disappears, it's coming from a connected signal source.
1.
If not, try disconnecting the connected signal cables one at a time.
If it disappears, it could be a ground loop issue, rather than a problem with the ASM5D.
2.
Use balanced connections where possible.
Where ever possible plug all audio equipment into mains power outlets which share a
3.
common ground.
4.
Try using a ground loop isolator on the affected audio signal connections.
Troubleshooting Guide
Troubleshooting
9
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