Epson 8700UB Dust Blob? - Page 2 - AVS Forum
Forum Jump: 
Reply
 
Thread Tools
post #31 of 36 Old 01-20-2012, 07:32 PM - Thread Starter
Member
 
mudsnowh2o's Avatar
 
Join Date: Jan 2011
Location: Herriman, Utah
Posts: 77
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
Well, it is not over yet. After running for a month, we turned it on tonight and the display is all red. They say that either one of the LCD panels or shutters has gone bad. I called in and they are insisting on trying out another refurb. This really sucks. Support has been top notch but the quality has left me very dissatisfied. I am extremely careful with my equipment and have never had any issues with any other audio or video equipment.
mudsnowh2o is offline  
Sponsored Links
Advertisement
 
post #32 of 36 Old 01-22-2012, 09:11 AM
Senior Member
 
calimark's Avatar
 
Join Date: Dec 2010
Posts: 340
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 11
Quote:
Originally Posted by mudsnowh2o View Post

Well, it is not over yet. After running for a month, we turned it on tonight and the display is all red. They say that either one of the LCD panels or shutters has gone bad. I called in and they are insisting on trying out another refurb. This really sucks. Support has been top notch but the quality has left me very dissatisfied. I am extremely careful with my equipment and have never had any issues with any other audio or video equipment.

Too bad lemon law doesnt apply to Pj's
calimark is offline  
post #33 of 36 Old 01-22-2012, 03:27 PM
AVS Special Member
 
FendersRule's Avatar
 
Join Date: Aug 2009
Location: Northwest
Posts: 1,695
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Liked: 12
Im astonished. Don't even know what to say.

Who did you buy it from? You may try to take this issue up with them in a detailed email.
FendersRule is offline  
post #34 of 36 Old 07-22-2013, 11:42 AM
Newbie
 
Gamelore's Avatar
 
Join Date: Nov 2007
Posts: 2
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
Bumping the thread because people might find this helpful.

I bought my Epson 8700UB less than 3 years ago and got my first "dust blob" a couple weeks ago. Despite running a living room air-filter, a giant green blur (about 6 inches across on my 110" screen) appeared right near the center. Totally visible on pure-black frames, ruining every movie I tried to watch by breaking immersion. Some people said to wait for multiple blobs before attempting surgery, but it was unacceptable to have my immersion broken consistently.

I dismantled the projector and used a vacuum cleaner in all the crevices but couldn't get close enough to the internal optics. Vacuuming had no effect.

About to give up and look into professional servicing, I tried one last thing: My electric leaf blower.

Brought the leaf blower into the living room. Inserted earplugs. Turned the leaf blower to "low" and, with my Epson 8700UB fully assembled (and turned off), I blew into the intake filter, both lens adjustment dials, the out-vent, and the lens. I turned on the projector, set it to a pure black image, and to my horror I'd spawned a second dust blob, even closer to the center! I'd made things worse!

In frustration, I left the projector on, cranked up the leaf blower to "medium" and fired directly into the intake filter. The second dust blob vanished, leaving only the initial blob! Progress! I walked around the projector, blowing into every orifice, including the out-vent (which I'd forgotten was running at the time), but nothing could affect the initial blob frown.gif Finally, with the blower on "maximum", I turned off the projector, took off the intake vent cover and vigorously blew directly onto the filter and the open video input ports for about 30 seconds. I finished by blowing, once again, into every orifice.

Turned on the projector, waited for the "EPSON" logo to come into focus, studying the area of the blob intently because I know the dust blob usually only becomes clear during the end of the warm-up phase. It was gone! With this relatively easy, low-tech solution, the image is now pure, crisp black throughout and I saved myself expense of sending it in for repair, or possibly cutting a control cable by taking off the upper control board. Thought I'd share so that other people know there is hope, and to give people the comfort of knowing that someone has braved using a dangerously powerful device on the Epson without damage.

Good luck!
Gamelore is offline  
post #35 of 36 Old 07-23-2013, 04:49 AM
AVS Special Member
 
Join Date: Apr 2000
Location: USA
Posts: 3,758
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 10 Post(s)
Liked: 18
Quote:
Originally Posted by Gamelore View Post

Vacuuming had no effect. About to give up and look into professional servicing, I tried one last thing: My electric leaf blower.
I suspect there are a lot better (and cleaner) blowers to use for this, but "whatever works" huh! wink.gif

Thanks for posting--I like to hear about dust blob solutions. My own PJ developed a few minor dust blobs and I've left them alone; as time's gone by they have receded into almost-nothingness as if they'd burned-up or something. I suspect too that many/most stubborn blobs become that way because they are "crisped" (burned) onto whatever hot surface they are attached to.

It does seem like blowing is a high risk affair re: the possibility of more blobs. BTW whenever I need a "clean room" which around our house means someplace where I can apply screen protectors to iGizmos e.g. phones and ipads and ipods etc. I take the towels and rugs out of a bathroom and work in there. The less airborne dust & dirt the better (duh) but a bathroom w/all hard surfaces is best for these kinds of efforts.
Laserfan is online now  
post #36 of 36 Old 07-24-2013, 05:51 PM
Advanced Member
 
Bohanna's Avatar
 
Join Date: May 2007
Location: Boston Area
Posts: 637
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Liked: 24
FYI,,, folks Whenever blowing air into an LCD projector start at the optical block and BLOW OUT! The last thing you want to do is blow air in from the outside. ALL you are going to do is force dust back into the optical path. The quickest way to see how dirty your optics are is to bring up a white screen and move the focus all the way in and all the way out. This will show the dust specks, blobs and every other thing that hiding in the optical path. WHATever you do NEVER use Q tips to clean the optics because they will catch on the panels and polarizers and you will have hair like lines on the screen. If you really want to clean up the panels Do a search on this board for Fuzzy sticks. It will point you in the right direction.

Better yet read from post 8

http://www.avsforum.com/t/1369211/any-way-to-diy-cleaning-of-dirty-internal-optics

Bohanna
Bohanna is offline  
Reply Digital Projectors - Under $3,000 USD MSRP

Tags
Epson Home Cinema 8700 Ub Projector

User Tag List

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page


Forum Jump: 

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off