Author
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Topic: Elmo st 800 sound problem
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Bradford A Moore
Master Film Handler
Posts: 272
From: Provincetown, Ma
Registered: Jul 2005
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posted October 18, 2009 11:01 AM
Hey Guys,
I had already tried all that you mentioned, and still no sound. I have never had stay off this long. The last time it was on, it sounded fine. Over the last couple of days, it would go off between reels, but if I waited a little bit it come back on. John Black suggested the electronic cleaner, but still no sound. I was amazed how dirty the heads were, I'm usually very good about all that. I hope this isn't something more serious, because I have just started my winter film series on Thursday nights.
Brad
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Steve Klare
Film Guy
Posts: 7016
From: Long Island, NY, USA
Registered: Jun 2003
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posted October 18, 2009 11:59 AM
There is a possibility here:
I lost sound completely on my own ST-800 about a year ago, and it just wouldn't come back whatever I tried. I don't have schematics to troubleshoot down to components, so fixing this had to come down to replacing entire assemblies. I happened to find a projector that had basically brand new guts, but the frame was damaged so that it couldn't run. One Saturday I sat down and transferred all these wonderful, mint condition parts onto my good frame, and basically built myself a brand-new Elmo ST-800.
The interesting part of the story (for you) is when I removed my old sound head assembly I found that a wire from the head had become detatched. There is a tiny circuit board right under the framing knob that these wires are attached to by a surface solder joint, which had let loose from the board and disconnected the signal out to the sound board. Had I seen this first, I probably would have been able to fix the projector without transplant surgery (-not that I mind having a brand new set of heads, boards and guides anyway...)
See if you can find this little board and gently prod the wires to see if one is dangling loose: this could be it.
-------------------- All I ask is a wide screen and a projector to light her by...
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