Film-Tech Forum ARCHIVE: Crest 3500s?

This is topic Crest 3500s? in forum Film Handlers' Forum at Film-Tech Forum ARCHIVE.

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Posted by Matt Zeiner (Member # 1914) on 01-16-2004, 04:10 PM:

Anybody got a schematic for a Crest 3500s power amp?

mzeiner@netheatre.com

Thanks..

Posted by Daryl C. W. O'Shea (Member # 1303) on 01-17-2004, 06:39 PM:

What series is it from?

Posted by Matt Zeiner (Member # 1914) on 01-17-2004, 08:35 PM:

Not too sure, Darryl - I am unfamiliar with this model. The power modules have a date printed on them - 1983. I found the problem on this particular one, though. I ended up ripping the power module apart (all of the semis had to come out to see the traces on the reverse of the board - not fun) and figuring out the phase inverter circuit. Open resistor in one of the feedback circuits. No longer need the schematic. Thanks, tho.

Matt