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Author
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Topic: Is there an easy way to simulate a lamphouse diode failure?
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Justin Hamaker
Film God
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Posts: 2253
From: Lakeport, CA USA
Registered: Jan 2004
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posted 08-07-2008 02:50 AM
I'm doing a training session on Saturday with my projection people and the main focus is going to be trouble shooting and problem solving. While I would not expect any of them to be able to change a diode, I would like to show them what happens when a diode fails.
I'm going to reiterate basic trouble shooting like checking breakers, fail safes, and power buttons; but I want to get into more advanced issues. I'm going to talk about things like loose parts on a brain, exhaust fan switches, what to do if you thread the wrong movie, how to use the media film cleaner, securing a print to prevent a throw, and whatever else I can cover in 2 hours.
For what it's worth, the training will be on the level of people who are competent at threading a projector, but are otherwise new to projection. A couple of the people know how to build up movies, all but one know how to tear down, but only one has had much experience dealing with real problems beyond missed fail safes or platter decks powered off.
As I type this, I'm really thinking diodes are more advanced than I want to get into. But I still think they should see what happens so they can better relate the info to me or a tech on the phone.
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Monte L Fullmer
Film God
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Posts: 8367
From: Nampa, Idaho, USA
Registered: Nov 2004
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posted 08-07-2008 04:40 AM
quote: Justin Hamaker I'm really thinking diodes are more advanced than I want to get into
Good assumption since this area is more complicated for a beginner to get into since it's dealing with a hazardous situation being around electricity. Plus, doing diode changeout is tricky in itself due to the right diodes have to be placed in their correct positions of positive and negative.
On diode failures: a simple test to tell them is to throw a bare light on the screen with machine running. If the light has a pulsating flicker, a good assumption would be that a diode has gone out and need experienced and QUALIFIED help in this area since that qualified individual will then do a very quick test of throwing a light on the screen with open dowser and shutter blade with machine off with lens removed since the light without a spinning shutter will not experience any pulsating to conclude the test of a bad diode (or a leg in a triple contactor within the console, or a leg in a triple breaker in the panel)
I'd just stay with a 4 level area of booth training to keep things on the simple side:
1-Knowledge of the basic operation of film handling with the machine, film transports and with proper presentations.
2- Make and break with all forms of filmwork with proper operations of MUTS, benches, et.al.
3- Preventive maintenance .. wiping and cleaning down machinery and associated components.
4- (optional) knowing how to do bulb changes and lamphouse/console maintenance.
Don't give them too much responsibility for the sake that they'll be under pressure to remember it all. Plus,if a thing or things go wrong, you're the "it" guy who'll get the final results from the top end.
Plus, if you do give them a lot to remember, then they'll expect pay to match such responsibiity and that could backfire as well.
Some tips and ideas ... - Monte
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