Pearl 2 12v at output and no offset control
EDIT: Supply problem is fixed, but I've still got 12v on my outputs and no bias control on both channels.
Forgive me if this has been covered, but I couldn't find anything in my search.
I just finished a Pearl 2 build, along with the power supply Wayne provided an example of in the build document.
The power supply itself outputs the proper voltage when not connected to the Pearl 2 boards, but once connected it reads as approx -55v on the negative supply and approx 15v on the positive. I can also measure 12v on the outputs, the pot having no effect.
The VR on the - side does output -24v as it should, but obviously the + supply does not.
Any insight would be appreciated. Thanks.
EDIT: Supply problem is fixed, but I've still got 12v on my outputs and no bias control on both channels.
Forgive me if this has been covered, but I couldn't find anything in my search.
I just finished a Pearl 2 build, along with the power supply Wayne provided an example of in the build document.
The power supply itself outputs the proper voltage when not connected to the Pearl 2 boards, but once connected it reads as approx -55v on the negative supply and approx 15v on the positive. I can also measure 12v on the outputs, the pot having no effect.
The VR on the - side does output -24v as it should, but obviously the + supply does not.
Any insight would be appreciated. Thanks.
Last edited:
I don't know if this is related, but the PS schematics in Wayne's document had
a missing connection. Please see the added connection here:
https://i198.photobucket.com/albums/aa276/aeroplane_album/Pearl2PSU.jpg
a missing connection. Please see the added connection here:
https://i198.photobucket.com/albums/aa276/aeroplane_album/Pearl2PSU.jpg
yup. that fixed my supply issue, thanks.
still have 12v at the output and a no effect pot, though...
still have 12v at the output and a no effect pot, though...