1

EQ573 Equaliser / Re: EQ573-II doesn't play sound

« on: February 21, 2026, 01:43:23 PM »

Checked. On TP3 is 0.9VAC and TP4 0.8VAC

2

EQ573 Equaliser / Re: EQ573-II doesn't play sound

« on: February 19, 2026, 01:02:07 PM »

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?

3

EQ573 Equaliser / Re: EQ573-II doesn't play sound

« on: February 18, 2026, 11:45:53 AM »

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)

4

EQ573 Equaliser / EQ573-II doesn't play sound

« on: February 15, 2026, 02:40:08 PM »

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