Crumar DP-30 schematics

[vertamps]

Currently found only one supplier who wants $25 for a digital download.

If anyone has the Crumar DP-30 schematics or know where i can get them cheaper please let me know. -William

[Enzo]

You are not far from me.

I MIGHT have a couple Crumar prints, I'll look, but no promises.

What issues are you servicing?

[vertamps]

Currently the filter sensitivity control is not doing anything to the sound. The Knob is fine, it sends a negative voltage to a PNP transistor that is attached to a CA3080 transconductance IC that i believe has something to do with a filter depending on how hard you hit the keys. One circuit board was a mess as all the 10uf caps leaked all over, so far i have replaced all of the electrolytics (minus the main power board) which brought this thing back to life. There are a few dead keys which i suspect are not the frequency divider chips, i will take care of that when i look at the key*-board.

[vertamps]

I emailed the company and asked for a lower price of $15, they agreed on it and stated the service manual is not of the greatest scan. So i will see when they send me the download link. *paypal

[vertamps]

Horrible scans indeed...