[andrixb]

I would need help with this module, please.
The module doesn't play any sound when in both pre and XLR mode.

V values match what is reported here: https://www.soundskulptor.com/forum/index.php?topic=25.0

I checked the tension, and I measured 16V.
Also,  I followed this thread too and around diod D2 I measure -15V / 7V (it goes 7V / -15V when I select XLR) https://www.soundskulptor.com/forum/index.php?topic=362.0
I checked all the solder joints around what is suggested, but the value around D2 measured doesn't change at all.

Thank you

[JPK]

Do you get a sound in bypass?
You must try to follow the signal on TP1, TP3, TP4, TP2, as described here.
It will tell you where the signal stops.

[andrixb]

Hi

Thanks for the suggestion.

I get a sound in bypass if it is connected to the MP573; nothing gets through otherwise.
On TP1, I get 0VAC. The board is REV2.3B, and the C8 is oriented as in the picture (negative facing the back of the launchbox)

[JPK]

Check the value and solder joints of R1...R4, C4, C5, U1, RLY1.
Check the direction of U1, RLY1.
Try swapping U1 with one that you are sure of.

[andrixb]

Thanks. 
I can get 1VAC on TP1, but now it is 0VAC on TP2. Soldier joints look fine. Could it be an issue with the U2 THAT1646?

[JPK]

Also check TP3 and TP4 (the audio goes through them before TP2).