Question about Mitsubishi WD-65732 65" Projection HDTV

1 Answer

Mitsubishi dlp dark in the courner

I just replaced the lamp and about a day later it became dark from the top middle to the right and also on the left top to the middle of the left side. It makes a perfect square were it is bright and color. I have picture but can't post it on here. If any one can point me in right direction.

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  • 4 more comments 
  • eugene mathis Dec 07, 2012

    the white spot in middle is of flash. i have pulled lamp out and cleaned it with air and soft rag. i also pulled back panel off and pulled out housing and used air on it all to clean. have checked mirror no cracks or blimish.

  • SD Tech
    SD Tech Dec 07, 2012

    Its a great picture! two places to look---something is partly blocking the light, in the set is what I mean. Either at the lamp housing or in front of it, could also be where the optical lens comes up near the middle of the set inside, if you did not remove anything on the rear, get that lamp out and look first where it faces---something (it looks like) square is down a bit and blocking the light itself---imagine something being held up with a light behind it partly blocking the light, almost like someone removed the front screen but since you did not it is likely right at the lamp, if nothing there I will step you thru the simple process to remove the entire screen so you can look at the optical lens and inside the screen.I think we are going to find this one!

  • eugene mathis Dec 07, 2012

    ok i pulled oout the lamp housing and its clean i removed the square glass right in front of the lamp and cleaned and checked it and tryed with out it and still got same pic. put it back in and still same picture. its not in the screen i can see it on the projecter (the black places.

  • SD Tech
    SD Tech Dec 07, 2012

    this is a typical Mitsubishi engine

  • SD Tech
    SD Tech Dec 07, 2012

    Note the round lens to the left--that is the optical unit that points up to the mirror and then is reflected onto the screen.. That lens unit is at the front and slides thru an opening --some have either a foam ridge around that or A PLATIC FLEXIBLE SHIELD ABOVE IT THAT COMES DOWN AND IS OFTEN TAPED INISIDE OR OUTSIDE THE CABINET WHERE THE MIRROR IS, THE TAPE IF THERE MAY HAVE COME LOOSE AND LET IT MOVE A TINY BIT. I will not have to drop or be out of position very much as anything between the lens and the mirror will be amplified and projected onto the screen, I have seen this before ---less than a quarter inch off and you will see it on the screen. The flexable one they use can get out of position as the engine is slide forward into place or if taped the tape can come off. It is possible you MAY be able to see from the rear of the set with cover off or you may have to remove the front screen unit---

  • eugene mathis Dec 07, 2012

    i pulled the engine out and tested it out side of the tv and the dark edges are still there so its between the color wheel and the projection unit.

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  • Mitsubishi Master
  • 14,553 Answers

To begin with remove lamp and make sure nothing happened there as if the light is partly obstructed it could cause this

You can post a photo here or contact support@fixya.com and email them the photo to forward to me.

SD TECH

I worked on a lot of these sets when they were new but do not think I have seen or heard of a issue quite like this---too odd it happened shortly after a lamp was replaced.

By the way I am sure you know or knew not to touch the face of the lamp with your fingers.

Posted on Dec 06, 2012

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ctf1800
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SOURCE: Mitsubishi WD52525 Brightness

Mitsubishi Caps cause dim Picture faulty capacitor issue in the WD-52525 does seem to be prevalent at the 3 yr mark. At the bottom of this long-winded comment is a link to another discussion forum similar to this one where we obtained the service manual, chassis replacement manual, and encouragement to attempt the repair ourselves. My husband and I are not experts by any means, but my husband did have the tools from previous electronics projects to solder. So we took a chance on looking for bad caps. And I am here to say that I’m so glad we did because there were 2 obviously swollen caps that were easy to replace. The picture is now even better than when the problem first occurred since we dusted the mirrors and screens while we were in there. NO WINDEX. Just a dry micro-fiber cloth did the trick. We'll probably do that annually going forward.

According to descriptions from several people, the symptoms and degrading image due to capacitor failure can take various forms. In our case, we had a lamp blow out 2 wks before the TV died. And I do mean blow out, not burn out. We didn't get any lamp replacement warning. It flat out blew the 1-yr old bulb to shards of glass inside the casing. We replaced the bulb with a brand new one like good stewards of a DLP HDTV should do. A mere couple of weeks later we watched the image degrade over the course of an hour through various stages until the new lamp simply wouldn't light anymore and there was a solid black screen and solid red lamp light even though the lamp itself was fine. The trouble-shooting diagnostics (pressing MENU and DEVICE buttons on the front panel) gave the 3-4 code indicating a lamp abnormality. But ultimately the problem was solved by replacing the C9A37 & C9A38 caps (both are 10V 3300M-M 105C). We did not have to do any repairs on lamp or ballast components. The cost of 2 new capacitors from Digi-Key including shipping was about $14.50.

Some folks have stated that they were able to do the repair without removing the power supply chassis from the back of the TV. That was not the case for us. It was a bit intimidating at first. But we disassembled everything, labeling as we went, so we could freely inspect and access all boards on the power supply. There are some tiny, very hard-to-reach connections between the power supply and the ballast. For this reason, I also recommend disassembling those ballast components from the frame. They're simply too fragile to force in a very tight space when reconnecting.

Lastly, I am still pleased with this TV. The color and clarity can not be rivaled in my opinion. Even after having gone through this, compared to the problems reported in some of the other threads on issues with whatever other brand name or model you pick, this is a relatively easy repair that can be DIY. This was why we went DLP in the first place. And it is why we will probably remain DLP fans until they aren't made anymore. But next time, we’ll go with an extended warranty for sure!

I do wish Mitsubishi would at least acknowledge the issue. I don't even expect any reimbursement, replacement, refund or anything like that. I'd just like to know that THEY know there's a simple problem to resolve and that they're doing something about it.

http://www.avsforum.com/avs-vb/show...=418307&page=84
good luck
please mark the post with a fixya

Posted on Feb 19, 2008

  • 146 Answers

SOURCE: Mitsubishi 1080p 73'' DLP HDTV - Color distortion

You need to replace the "light engine". This is very very difficult. You need to take it to a repair shop. But this will be very expensive. Around $1,000.00

Posted on Nov 20, 2008

  • 179 Answers

SOURCE: Mitsubishi DLP wd-52725 wavy lines from top left to bottom right

the DM board is going bad and needs to be rebuilt. check out www.tv-techs.com

Posted on Jan 07, 2009

  • 41 Answers

SOURCE: Mitsu 65" DLP-picture seems washed out

Most likely cause of your trouble is dust on the small mirror inside you set. Your DLP set has 2 mirrors not including the DLP chip itself which has about 500,000 tiny mirrors. The 2 mirrors reflect the DLP chip image to the screen you view. The first is the main suspect it's about 4inches by 7inches. It's mounted on the bottom center facing backwards. This mirror faces slightly up and somtimes after time dust, smoke, dirt settles on it . The second fills the space of the entire back of the cabinet but it faces down and takes alot longer to get dirty.
The compartment is sealed but dust seems to find it's way in. If you remove the screws that secure the screen assembly from the top , sides and bottom. Make sure to have a friend available the screen assembly is delicate when it's not mounted to the cabinet. You can remove and clean the mirrors. These mirrors are glass and you can use glass cleaned. Don't use glass cleaner on the screen it's plastic. You can clean it if necessary with plastic cleaner only. Probably not needed.
Good luck.

Posted on Apr 24, 2009

  • 1039 Answers

SOURCE: Mitsubishi 57" DLP. Replaced bulb, now picture is hazy.

Cleaning th mirror and lense will remove the haze. This oldel is much older that 2 years though.

Posted on Apr 25, 2009

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