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Discussion Starter · #1 ·
I have a Barco Data 800 with a dead power suuply board (we hope).


The new board will be here on Monday and I just wanted to see if there was anything else I needed to check or do before I put this new board in there....


I would hate to blow something else up or blow the power supply again...


Thanks!


Scott
 

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Discussion Starter · #3 ·
Excellent advice....


Ok, if there is nothing else to consider... the part is on the Fed Ex truck now to be delivered... I'll be trying it when I get home.


Does the cover has to be on for the unit to turn on?


I was going to blow out the projector with compressed air... is this recommended?


The lenses look great but I figured while they were off, I could give them a good cleaning... What should I use to clean them and should I take them apart and clean the insides?


Thanks!


Scott
 

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Does the cover has to be on for the unit to turn on?


Nope.

I was going to blow out the projector with compressed air... is this recommended?


Usually not. Could do more harm then good unless you really know what you're doing. Some types of compressed air in cans tend to also have some liquid in them so that they spit a bit when you spray. Not good. Others shoot out immensely cold air that could freeze/crack parts if you're not careful.

The lenses look great but I figured while they were off, I could give them a good cleaning... What should I use to clean them and should I take them apart and clean the insides?


Do not take the lenses apart!! If you really think innermost lens element needs cleaning then something used to clean telescopes mirrors/lenses would be ok. Do not use anything like windex or paper towels (very scratchy).


Again, best to not bother unless you really have a lot of grime on them.


Kal
 

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Discussion Starter · #5 ·
Windex is scratchy... I would have never thought.


I will stop at the camera store on the way home and pick up some cleaning supplies exclusively for lenses.


I will just wipe down the outsides of the lenses.


So, just put the board in and go...


Why does this feel like it is too easy?


Scott
 

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Quote:
Originally posted by djmm
Windex is scratchy... I would have never thought.


I will stop at the camera store on the way home and pick up some cleaning supplies exclusively for lenses.


I will just wipe down the outsides of the lenses.


So, just put the board in and go...


Why does this feel like it is too easy?


Scott
Actually it's the paper towels that are scratchy. I don't know if Windex is bad, but I assume it probably is since it most likely contains ammonia that may break down anti-reflective coatings that may be used on lenses. Anything with alcohol is probably bad too.


Best bet is it simply not clean them at all usually. Any dust or marks on the outside of the lenses (the sides that face the screen) will never be seen on screen as the outside lenses are very far from the focal point of the lens. When in doubt, don't do anything... you're more likely to do permanent damage instead of improving the image by "cleaning" the dust.


I did a search for "LENS CLEANING" in this forum and came up with a bunch of info...


Here's one the best posts:


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Dry air blown across the lens. If that isn't enough, William Phelps described his cleaning solution....


1 drop dishwashing detergent (not soap!)

(or Kodak Photoflo if you have it)

1/3 cup 99% Isopropyl alcohol

1 2/3 cup distilled water


It works very well indeed and does not harm the lens coatings. It's dirt cheap to make to boot. Cheap enough to use on your car windows. You won't believe what using an optical cleaner on a car window will achieve. Windex is residue city by comparison and should NOT be used on your projection lenses for fear of the ammonia dissolving the anti-reflection coating.


Don't get overzealous about cleaning. Every time you clean the lens, you will create some minor scratches. In other words, clean when cleaning does more good than harm.


The above solution can be misted on and wiped off with a soft lint-free cleaning cloth. Use each portion of the cloth only one pass. Start at the center and work outword. You will need to lightly buff until dry or else there will be visible residue.


Another cleaning product I very much like is Formula MC-1. I was turned onto this by Steve Smith. It leaves absolutely the cleanest lens surface I have ever seen. Use as a last step. Just a few drops do the job. The lens will appear to fog over as this dries. Buff the "fog" off and the lens will be cleaner than it ever has.


In either case, never never grind dirt back into the lens. Remove as much dust as possible with dry, compressed air. Very very lightly dust with a CLEAN soft brush. It is so easy to scratch the lens with a slightly soiled brush. Don't wipe a dirty lens while it is dry. Use a cleaning solution to loosen and lift the debris onto a clean soft lens cloth.


Be enthusiastic in throwing out multiple cleaning cloths. You're trying to preserve the lens, not the cloths.

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Full thread here: http://www.avsforum.com/avs-vb/showt...leaning+lenses


Kal
 
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