Film-Tech Forum ARCHIVE: FP20 PCB

This is topic FP20 PCB in forum Film Handlers' Forum at Film-Tech Forum ARCHIVE.

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Posted by Steve McAndrew (Member # 8865) on 09-25-2016, 02:01 PM:

Hi
The FP20 I am currently working on had the card pictured below installed. It controls the lens turret and aperture plate changeover. As all the cables were cut I wonder if anyone has any connection info. The only label on the card says 'REVOLVER'.

Thanks

Posted by Pete Naples (Member # 761) on 09-27-2016, 03:15 PM:

I've had a look, I've nothing on the older turret.

What I can tell you is the pot adjusts how long the motors run for, the idea was you tweaked it to run just long enough to change both lens and plate.

Good luck!

Posted by Ian Griggs (Member # 9542) on 10-01-2016, 12:41 AM:

Steve I have this board as well.
Mine is all connected up and working if you'd like me to trace the wiring. But this should all be in the manual.
Of course there's always the "armstrong" method IE changing by hand, unless you want to run this off the film.

Posted by Steve McAndrew (Member # 8865) on 10-01-2016, 03:46 AM:

Hi Ian

Thanks for the reply. I think I am getting somewhere with it. Does your board control both the lens turret and the aperture plates? I am just wondering why I have the extra relays on the small board?

Thanks

Posted by Pete Naples (Member # 761) on 10-01-2016, 11:07 AM:

The board does control both plate and turret.

I suspect the extra board with relays may have been used to control masking simultaneously.