View Single Post
  #3   Report Post  
TP
 
Posts: n/a
Default

Thanks Deke. The comment you made of "check the level and
condition of the cooling liquid". Can I buy replacement cooling
liquid? I'll work on carefully getting the screen off to see
which type of mirror we have.

TP

Deke wrote:
"TP" wrote in message
...

I need some advice on cleaning and adjusting my Zenith 55 inch
rear projection TV. It’s about 5 years old and we haven’t done
anything to it, but turn it on and watch.
Cleaning seems straight forward, blow out the dust vacuum up
the mess. Are there any cleaning sprays that could be used?
Should I use non alcohol products to clean the lens?
Could I setup a mirror and adjust the image from behind?

Thanks
TP



Never, NEVER, remove the top part of the back of a projo TV. Thats where
the mirror is. DO NOT remove the top part of the back of a projo TV.
As to cleaning it, its done from the front of the set, by removing the
screen. Cleaning is best done using warm water and a bit of dishwashing
liquid, a very soft sponge wrung almost dry (NO DRIPS!), then wiping with
newspaper. A soft bristle brush is handy also, for removing
small dead bugs from awkward places. Canned air, and/or a small vacuum
cleaner will also help.
Keep in mind that some mirrors are what they call first surface mirrors,
that means that the silvering is on the side youre cleaning, not on the
back, like a regular mirror. Scratch it badly, and its toast. Also some
sets dont have a glass mirror, but instead have a sheet of tightly
stretched mylar.
If you cant figure out how to get the screen off, you shouldnt be trying to
clean it. If you do manage to get the screen off, DO NOT try to take the
screen itself apart with out some serious markings as to how to put it back
together EXACTLY. Same goes for the lenses on top of the CRTs. Cleaning
time (I do mine once a year, usually in the fall) is also a good time to
check the level and condition of the cooling liquid.
If yours hasnt been cleaned in 5 years, and you manage to clean it without
destroying it, you'll be in for a pleasant surprise. Dust, cooking smoke,
and cigarette smoke
take a terrible toll on picture quality. Good Luck!