This is topic Has this ever happened to you? Bulb! in forum 8mm Forum at 8mm Forum.


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Posted by Tom Photiou (Member # 130) on September 15, 2015, 03:04 PM:
 
Tonight i was watching a film on my Elmo 1200HD. Some of you may be aware of my lens fungus question not too long ago.
Well, that's been sorted, i put a poor contrast down to that problem without giving any thought at all to the bulb simply because the one that's in there is only a few months old.
However, during a cartoon tonight the picture got dimmer and dimmer until the bulb went out.
Upon removal i was well annoyed to see that one of the pins had broken off and was lodged in the bulb holder.Luckily with the aid of a pair of good long tweezers i got it out. Nothing appeared to be wrong with the contacts so i cleaned them up anyway with a little emery cloth and some electrical cleaner. Obviously i put an old cloth under to stop any bits going into the machine or film path then cleaned out the entire machine using compressed air.
Popped in a new bulb and is well and my films are brighter than i can remember, almost like a new lens has been put in.
Is this something any of you have encountered before? its a first for me but looking at how shiny and clean the pin still on the bulb is compared to the burnt out broken one.
I've checked to ensure there is no arcing or sparking in the contacts & it all seems OK. [Confused]
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Posted by Paul Mason (Member # 4015) on September 15, 2015, 03:25 PM:
 
Hi Tom,
Never happened to me but I can imagine how puzzling and annoying it was. Obviously the lamp pin got hotter and hotter before it eventually failed with the volts applied to the filament dropping progressively leading it getting dimmer before the circuit was broken. Either the lamp holder and pin made a poor contact but this is unlikely as I would expect to see blackening on the lamp holder or it was a manufacturing fault inside the lamp where the pin connects to the filament. I would say this was the most likely from your pictures. Your new lamp should be OK if the holder is all right. Run a long film and check all is well after an hour's operation. Good luck and let us know how it goes.
 
Posted by Andrew Woodcock (Member # 3260) on September 15, 2015, 05:36 PM:
 
Its a simple fix. See past solutions, very well documented on here by myself and many many many others.... No Drama with this one!!

Oh for the power of research!!!!
 
Posted by Steve Klare (Member # 12) on September 15, 2015, 05:50 PM:
 
Those Awful Elmo Sockets

The epilogue to this is you need to buy a decent replacement socket: I bought a cheapy and it died and took a lamp with it in about 6 months. After that I bought one recommended by the guy I buy my lamps from. Based on the experience I actually bought a couple of spares too.

While you are at it, make sure to clean the rear element of your lens as often as the front. I was astounded the difference this made.
 
Posted by Winbert Hutahaean (Member # 58) on September 15, 2015, 06:55 PM:
 
That is exactly my experience Tom. Read here:

Strange problem, bulb lose one pin after several time uses

Cheers
 
Posted by Paul Adsett (Member # 25) on September 15, 2015, 07:49 PM:
 
http://8mmforum.film-tech.com/cgi-bin/ubb/ultimatebb.cgi?ubb=get_topic;f=1;t=007492
 
Posted by Tom Photiou (Member # 130) on September 16, 2015, 08:07 AM:
 
Ideal, thanks everyone. [Wink]
 
Posted by Jerome Sutter (Member # 2346) on September 16, 2015, 12:57 PM:
 
I had a similar problem, but not with the pin. My bulb turned into various colors: yellow, blue, black and burned out. I believed that somehow air got into the bulb, and blew.
 
Posted by Tom Photiou (Member # 130) on September 16, 2015, 02:54 PM:
 
Does anyone know where you can get the complete socket with metal bracket so i can avoid having to do any modifications?
 
Posted by Maurice Leakey (Member # 916) on September 16, 2015, 03:05 PM:
 
I believe that Classic Home Cinema may have some Elmo spares.
 


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