Section 13: Turn-on Procedure
At this point we should be finished – we have two working power supplies – Perform the following checks:
Make sure that the Digital Power Supply is connected correctly to the Digital Board.
At this point we can try the turn on – we should see the 3 LED‟s on the Digital Board Light up – If they do not then I would
suggest rechecking the inter-wiring to the digital board and the power supply and or measuring the voltages again.
If all of the LED‟s are on, we should try putting a digital source into the DAC.
We have provided you with an audio test CD with one track on it generating a 1Khz sin wave that should allow you to get
a solid AC voltage measurement at the output of the DAC – 1V RMS (AC measurement!).
Plug in the digital source using a 75-ohm RCA cable (or any spare RCA cable for now) into the DAC. You will probably
hear the relay chatter when you first connect or the digital board receives a digital signal. If the chattering continues then
power down the DAC and power on again in a few seconds – all should be well.
Connect the analog outputs to a line level pre-amplifier or an integrated amplifier and check to hear the sound!
The M2 Power supply can take up to 45 seconds to turn on so be patient when you are waiting for the music to play.
Congratulations if you have a working DAC3.1 Kit. Feel free to contact us to share your excitement or if you are having
any problems on the debugging front!
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