8mm Forum: eumig 810D sound problem

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Topic: eumig 810D sound problem

Gary Crawford
Jedi Master Film Handler

Posts: 979
From: Manassas, VA. USA
Registered: Jun 2003

posted November 27, 2006 02:02 PM

The main problem is ....no sound. I opened it up and found one of the fuses blown. Replaced it...powered it up....I hear a sound through speaker for a half second...then dead again. Another blown fuse. Three times. Motor, lamp and all work fine. something is open in that circuit somewhere, I suppose. Any ideas? thanks so much .

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Brian Hendel
Jedi Master Film Handler

Posts: 902
From: New York, New York
Registered: Jun 2003

posted November 27, 2006 03:39 PM

Gary - Sorry but I don't have an answer for your problem... but I'm having a problem with the sound on my 810D. There is an incredibly loud hum that is worse on the regular 8mm setting. I hear that that is a common problem that occurs and was wondering if anyone found anyway to improve it. Thanks...

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Steve Klare
Film Guy

Posts: 7016
From: Long Island, NY, USA
Registered: Jun 2003

posted November 27, 2006 03:58 PM

I have a Bolex branded variant of the 810D which is pretty hummy too. I've fiddled with it quite a bit and reached the conclusion that the way to deal with it is pipe the sound through filtering and then an external amp and speaker.

Gary, it sounds like some component within your sound circuit is failing and headed towards being a short circuit. It's probably overheating, so you may be able to identify it by discoloration of the body or leads.

If having a schematic for the sound board would help either of you, I have it scanned in and would be happy to e-mail it.

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All I ask is a wide screen and a projector to light her by...

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Kevin Faulkner
Film God

Posts: 4071
From: Essex UK
Registered: Jun 2003

posted November 27, 2006 05:13 PM

Why not get it put in the Manuals section. Steve, if you want to email it to me I'll get Brad to post it up for us. PM me via the forum here.

The hum can be reduced on these machine by adjusting the hum buck coil behind the control panel. If you remove the control knobs etc and then the panel itself you will see a coil on a piece of brass strip behind the panel near the rear of the vol control. Turn the motor on as well as the lamp and increase the vol control to max. Using a plastic object such as a ball point pen move the coil about for least hum. Thats all there is to it.

Kev.

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GS1200 Xenon with Elmo 1.0...great combo along with a 16-CL Xenon for that super bright white light.

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Steve Klare
Film Guy

Posts: 7016
From: Long Island, NY, USA
Registered: Jun 2003

posted November 27, 2006 06:34 PM

Hi Kevin,

Done! Please check your e-mail.

Tried the hum-buck coil thing. It helped a bit.

The thing I find with it is it doesn't sound too bad through the internal speaker, but if I put on a larger external speaker (ie: better bass response), the hum becomes annoying.

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All I ask is a wide screen and a projector to light her by...

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