M-AUDIO Super DAC - Manual (Page 9)

TROUBLESHOOTING
Symptom:
When power is applied, there are no LED's lit on the Super
DAC's front panel.
Solution:
Make sure the correct power supply is properly plugged into
the unit and also into a live wall source or power strip. Also make sure the
unit’s Power button is pushed (and latched) in.
Symptom:
When the digital audio source changes sample rates, or I select
a different digital input using the Format button, the audio is muted for a short
period of time.
Solution:
This is normal as it takes a small amount of time for a digital
audio receiver to lock onto a digital audio source. In order to prevent spurious
noise, the Super DAC mutes its analog outputs until it sees a valid digital
signal for 200 milliseconds.
Symptom:
When applying a digital signal to the Super DAC, the DAC's
"Data Valid" LED lights erratically or not at all.
Solution:
The digital signal being input may be invalid or the digital
cable may be faulty.
Symptom:
Valid digital data is coming into the Super DAC (the D/A
Valid LED is lit), but there is no audible analog audio output.
Solution 1:
Check your analog output connections from the Super DAC.
Solution 2:
The digital data source may be sending valid data, but the data
could be static (non-changing or DC). Verify that digital source material is
actually valid.
Solution 3:
The digital data source may be sending valid data, but the data
could represent an extremely small waveform (one with very low volume) that
you are unable to hear.
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