[fm_xtk]

Originally Posted by EddieJones

This is most likely the crystal(s). We usually replace both when we're in there.

You should measure the +/- 18Vdc rails. They should be between 17.5-18Vdc. Attached is a picture. In this picture, the 3 test-points can be seen just under the serial number label, just to the right of the black heatsinks. They're labelled +18, GND, and -18.

The pictured board is a newer version with the regulators heatsinked, the older versions have the regulators lay flat, soldered to the board.

The crystals are custom-made by Cal Crystal Comclock. High-precision. We have some we could sell you.

That's great - thank you so much, Eddie. I will measure the voltage over the test points and take it from there. Since I am up against it working to a deadline it might be a few days until I can see to it. I will come back to this thread to update.


Thanks again!