Hey,

I am working on an Audiosource Amp Three and it is not outputting any sound. It is amplifying on the power amp board and sending the signal to the speaker output board but it's not getting though.

I took the board out and put a sine wave through it and checked the speaker connections and nothing. I engaged the relays one by one with 12VDC and the output started working.

I am trying to figure out what is causing the relays not to engage and was hoping someone could read the schematic and help me out.

DC is less than 50mV on L and R connectors on power amp board.

Here is the schematic for the speaker board:

• http://i.imgur.com/zlynYFy.png

Here is the schematic for the entire amp:

• http://www.audiosource.net/wp-content/themes/passion/ftp/webmanuals/Amplifiers/AMP3.pdf

Many thanks!