8mm Forum: Problem with Elmo SC-30 Lamp

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Topic: Problem with Elmo SC-30 Lamp

Robert Saraceno
Film Handler

Posts: 32
From: Endicott, NY, USA
Registered: Aug 2014

posted May 13, 2016 10:00 AM

Has anyone ever had a problem with their projector blowing bulbs?
I just purchased an an Elmo SC-30, when it arrived the bulb was burned out, I put a new EFR bulb in and it immediately blew it as soon as I hit forward. I got this bulb off Ebay so I don't know how old it is, but I just wanted to know if anyone has seen this before - any advice would be appreciated.

Thanks in advance

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Dominique De Bast
Film God

Posts: 4486
From: Brussels, Belgium
Registered: Jun 2013

posted May 13, 2016 10:09 AM

I had that problem with a 100 volts projector I plugged on the 220 volts net but as you live in the US, that cannot be the same problem as you use 110 volts there.

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Dominique

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Maurice Leakey
Film God

Posts: 5895
From: Bristol. United Kingdom
Registered: Oct 2007

posted May 13, 2016 10:17 AM

quote:
as soon as I hit forward

I assume you mean the "lamp on" position. It is possible that the new lamp was faulty.
Have you a test meter that can check for faulty connections such as anything going to earth (ground) that should not be, also you could see if 15 volts is at the lamp-holder.

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Maurice

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Barry Attwood
Phenomenal Film Handler

Posts: 1411
From: Enfield, U.K.
Registered: Aug 2003

posted May 13, 2016 11:14 AM

You could also check that no more than 12v is going to the lamp, if so it may be an electrical fault, perhaps a transistor or something similar, then you'd have to get it looked at.

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Andrew Woodcock
Film God

Posts: 7477
From: Manchester Uk
Registered: Aug 2012

posted May 13, 2016 11:19 AM

15vac as Maurice says Barry, according to this;

http://super8wiki.com/index.php/Elmo_HiVision_SC-30_Projector

And yes, please do check first that the machine is set to run safely on a 110v 60hz supply.

Lamp circuits, tend to be very simple in their make up. No transistors etc in circuit typically.

You have a lamp holder, a switch, a fuse and a transformer typically, and besides some cable and connections, not a great deal else.

You may have a faulty lamp connector that is causing a short circuit or maybe a faulty switch or power supply to the lamp.
With only this to go off, who knows for certain?

Either way, it shouldn't be difficult to diagnose with a multi meter given the very few components making up this circuit here.

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"C'mon Baggy..Get with the beat"

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Robert Saraceno
Film Handler

Posts: 32
From: Endicott, NY, USA
Registered: Aug 2014

posted May 13, 2016 02:18 PM

I left out some info earlier - the projector is from Japan, and runs at AC 100v 50 or 60 hz only, no internatonal voltage. I've run other Elmo projectors set at 100v on 110v power and not had the same problem. The motor, amp, and everything else works fine, I ran film through it already. I have to get a new volt meter, I seem to have misplaced my old one.

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