Spectral DMC-12 - need adjustment info

[GKTAUDIO]

I recently did some minor repairs to a fine condition Spectral DMC-12, but have been unable to find a service manual, schematic, or even a user manual.

There are trim pots for gain, and others which are for bias of the output MOSFETs, I assume. There are also dip switches for all of the inputs except the phono section, which appears to have solder pads for loading resistors.

Does anyone have a schematic or manual for the DMC-12, or have knowledge of how to adjust these units?

Thanks!

 

[GKTAUDIO]

Anyone have knowledge of the Spectral DMC-12?

 

[GKTAUDIO]

OK, I opened it up again, and see there are markings for the dip switches, so now I'm just looking for info on measurement/adjustment of the various trimmers, if anyone can help.
Thank you.

 

[GKTAUDIO]

Anyone have experience with these?
Cheers,
Greg