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Author Topic: Eumig 938
Stuart Fyvie
Film Handler

Posts: 90
From: Amersham
Registered: Jun 2003


 - posted June 15, 2003 04:35 AM      Profile for Stuart Fyvie   Email Stuart Fyvie   Send New Private Message       Edit/Delete Post 
A friend of mine has had problems with his eumig 938 blowing lamps.
I sugested puting the transformer tap onto 230 volts as it was on 240. Has anyone had problems with this? Another theory was the ceramic bulb holder
is corroded and this drops the current to the pins. W didn't have any spare lamps to try. Can anyone also recomend a cheap supply in the UK of 15v 150 w lamps? Good to see the forum back also.

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Paul Adsett
Film God

Posts: 4789
From: USA
Registered: Jun 2003


 - posted June 15, 2003 10:20 AM      Profile for Paul Adsett     Send New Private Message       Edit/Delete Post 
Hi Stuart,
I have a Eumig S938 and have had no problems with blown lamps. The pin or socket corrosion may be the problem. Lamp pin or projector socket corosion would increase the resistance in the lamp circuit and would lower the current in the lamp. This should INCREASE lamp life. But if you have lamp pin or projector socket corrosion, the contact between the socket and the lamp can be so poor that the lamp will not light up at the 3 volt warm up setting which is applied when you first turn on the projector. But it may still light up when you put the projector into the forward-with-lamp position. This 3 volt warm up is essential to preserving lamp life, without it the lamp sees the full shock of 12 volts applied in a cold condition, and this will blow lamps really fast. So the first thing to do is to make sure the lamp glows when you just turn on the projector. If it does'nt you have poor contact, in which case sand the lamp pins with emery cloth and wipe the contacts with a very slight amount of vaseline to help prevent corrosion. Probably though you will have to replace the lamp socket. I have found you can get halogen lamp sockets at Home Depot, or if you can't find one you may have to buy a cheap halogen track light and strip out the socket. These halogen lamp sockets all corrode, and have to be replaced every few years.
Finally, to extend lamp life, you need to set the transformer to a higher voltage setting NOT a lower voltage setting, say 240 or 240 volts in the UK, instead of 230v.

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Trevor Adams
Jedi Master Film Handler

Posts: 749
From: Auckland,New Zealand
Registered: Jun 2003


 - posted June 15, 2003 06:51 PM      Profile for Trevor Adams   Author's Homepage   Email Trevor Adams   Send New Private Message       Edit/Delete Post 
I had a Model 940 and it kept blowing lamps.I assumed it was giving more than 15volts to the lamps so dumped it(the projector cost less than a couple of lamps!)It would be a good idea to get the voltage checked.Trev

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Trevor

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