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Untuned
Joined: 03 Dec 2011
Posts: 93
Location: Pooler, GA
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| Posted: Tue Dec 06, 2011 1:45 am Post subject: Newbie question about phosphor wear |
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I've been lurking here for bit. There's a projector here for sale locally that I'm interested in. Unfortunately the owner knows very little about it; he bought a few years back in a surplus sale, but never completed the home theater room and consequently never used it.
I would like to look at the phosphor wear, but I don't know where to begin. Is it necessary to remove the lenses to do so? Is it difficult/complicated to do? I'm handy but not brilliant.
Thank you
I should mention what it is: Marquee 8110+
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Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
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AnalogRocks
Forum Moderator
Joined: 08 Mar 2006
Posts: 26706
Location: Toronto, Ontario, Canada
TV/Projector: Sony 1252Q, AMPRO 4000G
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| Posted: Tue Dec 06, 2011 2:02 am Post subject: |
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I'll add, get an LED flashlight. It shows the wear better
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Untuned
Joined: 03 Dec 2011
Posts: 93
Location: Pooler, GA
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| Posted: Tue Dec 06, 2011 4:07 am Post subject: |
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Ok, thanks for your input. I'll be sure to have a led flashlight with me!
About removing the lenses, is it straightforward? Or do I need a step-by-step?
Thank you!
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jeffslife
Joined: 17 Apr 2010
Posts: 4190
Location: ohio usa
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| Posted: Tue Dec 06, 2011 8:53 pm Post subject: |
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Get a long magnetic phillips screwdriver
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HaydnG90
Joined: 22 May 2006
Posts: 1356
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| Posted: Tue Dec 06, 2011 9:23 pm Post subject: |
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| jeffslife wrote: | | Get a long magnetic phillips screwdriver |
Depends on the pj. The Sony G90 uses silly little brass philips head screws. The Barco 808 required a metric socket set with extensions to remove the lenses.
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dvh99
Joined: 25 Dec 2009
Posts: 2158
Location: nederland
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| Posted: Tue Dec 06, 2011 9:28 pm Post subject: |
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best way to determine wear imo is to project (if possible selbstverständlich) a 100ire full white field and select one color at a time.
make your raster as big as possible, this means 4:3 ratio.
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HaydnG90
Joined: 22 May 2006
Posts: 1356
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| Posted: Tue Dec 06, 2011 9:45 pm Post subject: |
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| dvh99 wrote: | best way to determine wear imo is to project (if possible selbstverständlich) a 100ire full white field and select one color at a time.
make your raster as big as possible, this means 4:3 ratio. |
True, but may not be practical if the pj is down and there is no screen to project onto. A good eyeball over the crt faces with the lenses off will tell you everything you need to know regarding phosphor wear and burn. Won't tell you if the tube is any good output wise though.
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Untuned
Joined: 03 Dec 2011
Posts: 93
Location: Pooler, GA
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| Posted: Mon Dec 12, 2011 12:01 am Post subject: |
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Thanks for all your input. Unfortunately, someone else beat me to it.
There is another pj I found locally, and I'll start another thread for that!
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draganm
Joined: 08 Mar 2006
Posts: 8990
Location: Colorado
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| Posted: Tue Dec 13, 2011 4:25 am Post subject: |
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| HaydnG90 wrote: | | Won't tell you if the tube is any good output wise though. |
yup, and 8110+ indicates a 1996 marquee with possible filament voltage problems and dead tubes.
They dropped the + designation later on. Oh and a marquee AC lens requires a 5/32's hex bit driver, not a Phillips like other PJ's.
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