Question about Optoma RPLMNT LAMP FOR EP761 / TX761 - BL-FU220C

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How do I clean dust from inside the lens on Optoma EP761 projector/

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 3 Answers

SOURCE: OPTOMA EP716

ALSO CHECK YOUR FAN. IF THE FAN OR A HEAT SINK IS NOT WORKING PROPERLY (I.E. THE FAN MAY JUST NEED TO BE CLEANED OR REPLACED, THERE SHOULD BE A SMALL HEAT SINK. IF CLOUDED W/DUST, IT WILL KEEP THE OPERATION SHORT). ALSO CHECK IF YOU HAVE SET ANY TEMPERATURE SHUTDOWN PARAMETERS. IF YOUR LAMP HEATS UP FOR SO LONG AND REACHES A TEMPERATURE THAT WILL AFFECT THE CIRCUITS, THIS OF COURSE WILL SHUT DOWN YOUR UNIT UNEXPECTEDLY. HOPE THIS HELPS...JGUAM

Posted on Apr 05, 2008

  • 1 Answer

SOURCE: EP716 Optoma Projector Fuse

There is no fuse. I took my EP 716 apart to find out why it died. I found a resistor had blown on the power board made by the Tiwan co. Quazarpower. 

Posted on Jan 03, 2009

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SOURCE: blotchy colors on optoma hd80

i had, have the same problem i also replaced the bulb then shortly after the power went out no standby light or anything. From what i've read so far it seems like a power supply issue so i ordered two power supplys from optoma 1 for lamp 1 for the unit waiting on delivery from CA they were $ 99 each if this work i'll be one happy camper. Three years no problems it's a great machine with incredible picture using 106" screen

Posted on Jan 29, 2010

  • 269 Answers

SOURCE: dust inside lens...

this can be a doozy, but if you are up to it, remove the top cover, you may have to remove the rear, front and maybe sides, i don't know, but what you are after is the cover over the top of the lens. take that off and use air to blow it out--don't touch anything, just blow. several bursts then quickly replace the cover over the lens assy. if used in a dusty environment or ceiling mounted, you may have to do this as needed.

Posted on May 24, 2010

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SOURCE: How do i clean the inside of the lens? there is

take a little paper towel make it thin and stick it in their and wiggle it arround and wiggle it around like you just dont care,. ; )

Posted on Dec 28, 2010

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1 Answer

White spots on projector


firstly make a clean for your projector DMD chips or color weel, if it still ahs whie spots, It should be dead pixels, since for the DMD chips issue. you have to replace a new DMD chips. i have DMD chips fit for Optoma EP761, it will cost USD123 with shipping

Jan 11, 2013 | Optoma EP761 DLP Projector

1 Answer

Bubbles are projected on the screen


I am assuming that the "bubbles" are most prominant when the picture is dark. If that is the case, it is most commonly referred to as dust "blobs". Dust particles get on the lens assembly inside the projector and are just out of focus so they appear as blobs or bubbles. If you can carefully remove the cover and gently blow out the lens / color wheel area with compressed air it should reduce the "bubble" effect. I would not recomend any further dissasembly as it is complex and time consuming and unless your very careful, could end in disaster. Don't forget to clean the air filters either.

Aug 03, 2011 | Optoma EP721 Projector

2 Answers

When projecting the screen has a lot of white dots as though the lens needs cleaning ,the outside of the lens is clean


This is a dlp projector and has a bad DMD chip. Most models are very similar. Here is a video of a similar repair.

Feb 06, 2011 | Optoma EP727 XGA 2200 lumens DLP...

1 Answer

How do i clean the inside of the lens? there is dust on the inside and it is causing alot a little white spots to appear on the screen.


take a little paper towel make it thin and stick it in their and wiggle it arround and wiggle it around like you just dont care,. ; )

Dec 28, 2010 | Optoma PRO250X Projector

1 Answer

There is dust inside the lens. how do I clean the dust from inside the lens?


Your projector needs little maintenance. The only thing you need to do on a regular basis is

to keep the lens clean.

Never remove any parts of the projector except the lamp. Contact your dealer if other parts

need replacing.


Cleaning the lens

Clean the lens whenever you notice dirt or dust on the surface.

• Use a canister of compressed air to remove dust.

• If there is dirt or smears, use lens-cleaning paper or moisten a soft cloth with lens cleaner

and gently wipe the lens surface.

Never rub the lens with abrasive materials.

Nov 27, 2010 | BenQ MP623 DLP Projector

1 Answer

I just put in a new lamp bulb for the second time and it seems that when i use my projector for about 15 minutes it seems to change colors on me like it will freak out and just change colors.. why is this...


Its not the lamp. I had the exact same problem. You need to clean the inside of the optoma from dust. Especially clean the colorwheel and the sensor next to it. Search on google for more on this.

Oct 29, 2010 | Optoma HD70 DLP Projector

1 Answer

Blured picture on thomson projector tv


If cocusing teh projector is not working, try cleaning the lens. Sometimes dust is dislodged when replacing a lamp and coats the optics.

Jun 27, 2010 | Optoma UHP 120W Replacement Lamp Projector...

1 Answer

Dust inside lens


this can be a doozy, but if you are up to it, remove the top cover, you may have to remove the rear, front and maybe sides, i don't know, but what you are after is the cover over the top of the lens. take that off and use air to blow it out--don't touch anything, just blow. several bursts then quickly replace the cover over the lens assy. if used in a dusty environment or ceiling mounted, you may have to do this as needed.

May 20, 2010 | Optoma HD65 DLP Projector

1 Answer

DV10 optoma movie time is suddenly not recognizing DVD disks. It has been working fine for nearly two years. The projector works fine when connected to the TV box. The disk player spins but will not read...


there are dvd cleaning disks that work ok. you can get them at best buy or radio shack. they'll just lightly brush the dust off of the lens on the optical pickup. if the unit is is humid conditions, you'll need to use a lint free microfiber lens cloth and gently brush the dirt off of the lens. if there is stuff stuck to it, you'll need denatured alcohol with a scratch free fiber swab to wash off the lens (don't use a lot of alcohol). blow it dry and test it out.

Aug 28, 2009 | Optoma MovieTime DV10 Multimedia Projector

1 Answer

My projector Benq pb6200 needs cleaning from the inside how???


I have an Optoma EzPro 737 DLP projector that accumulated dust inside the lens and for ages I couldn't figure out how to get rid of it. It cast shadows onto the picture and scattered light outside the edges of the picture. I thought I'd have to dismantle the whole lens assembly (then realised that this is virtually impossible without being an expert). I then stumbled upon a little black rubbery plastic panel on the side of the light path, which unclips. I then realised that the dust had built up on the lens that sits in front of the DMD chip (the thing that makes the picture).

Here's what I did, with the case open and having vaccuumed out all the dusty parts of the projector to avoid making the situation worse:
- Took off the little rubbery panel,
- Removed the lamp from the projector and placed a flashlight inside, shining into the light path (or a mirror directing light from a table lamp above)
- Looking directly into the lens from close up, you should be able to see the particles of dust stuck to the inner lens (with a nice magnified view)
- First tried blowing air into the gap on the side of the light path (I used a balloon pump).
- Next, I poked a piece of thick nylon fishing line into the hole so that it could touch the surface of the inner lens.
- While looking into the lens, I could see the tip of the nylon, then directed it to the largest dust particles and used it to scrape them off (nylon is much softer than glass, so won't scratch the lens).
- This was quite time consuming but I got rid of the most obvious bits.

I'm not sure how different this would be for another model of projector - but I hope it helps!

Dec 16, 2007 | BenQ (200NSH-LAMP) Projector Lamp for...

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