Question about Mitsubishi WD-73640 73-Inch 1080p Projection TV

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I have a 72 inch Mitsubishi 3D DLP Home Cinema Model # WD-73640. It makes a loud humming noise and the color is distorted (purple to green). Is the color wheel defective?

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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premtech
  • 934 Answers

SOURCE: mitsubishi wd-62825 dlp

The WD62825 has a Digital Module located on the left side of the chassis looking at it from the rear of the set. It's housed in a metal box that can slide out of its holder after removing the trim screws.
The module has its own power supply board and there are a group of 16v/1000uf caps on that board which commonly fail causing the constant flashing standby light. Further back on the module is a small board about the size of a matchbook called the E2P module. Its SMT (Surface Mount Technology) caps also commonly fail which can cause the same symptoms. Techs can tell whether the E2P has failed by simply removing it, hooking the DM back up and trying to power the set. If it powers on the picture won't be much good - but at least you can tell what's keeping it down...
Back to the caps on the pwr board. If they've failed they usually will buldge visibly on top. And ESR is almost not necessary. In any event that's the nuts and bolts on this model.
Is it a job for a layman? Yes and no - you might strongly consider a tech if you don't feel comfortable removing all the connections that the DM has with the signal board. There are about six - multi-pin - wired connections to unplug and then sliding the DM out of the unit and carefully removing the screws and latching to take the DM top cover off...
Hope this helps.
Bill

Posted on Nov 10, 2007

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  • 1153 Answers

SOURCE: Mitsubishi DLP 62" WD-62725- Clear Picture w/ Purple Screen

Sounds like one of your colors are missing. make sure all colors are lit, Blue, Red, Green

Posted on Dec 27, 2007

Slinteriors
  • 8617 Answers

SOURCE: i have a 62 inch mitsubishi dlp model#wd-62525 serial#125902 , tv will not power up it has a flashing green lite below the timer button that flashes,i have try the reset button but it just starts blin

if the light just constantly blicks green and doesnt stop. You will need the" V26 DM repair kit " which will usually repair that issue. You can get the repair kit at the following link which includes the replacement capacitor and instructions
http://servicemanuals.vstore.ca/

Posted on Sep 26, 2008

  • 58 Answers

SOURCE: Mitsubishi WD-52525 52-inch DLP HDTV ywllow warning lamp light

that means your lamp it is getting to the end of its life.
sometimes even if the lamp still good the TV will send you that message because that timer is closed to 5000 hours

What you can do is open the lamp door, closed again and the tv will ask you if you replaced it the lamp, and just say yes and that sign will go away

or just simple replace the lamp. 915P020010

Posted on Apr 18, 2009

gopakumarg43
  • 74198 Answers

SOURCE: TV is 73" DLP Mitsubishi.

Hello
There are tow reaons for this fault. The first one is with the colour whell as you mentioned here. The second and most importan one is with its bulb itsef. Colour wheel won't cost too much. Just replace it first and see whether it helps you. If not, bulb may have to be replaced.OL

Posted on Jul 31, 2011

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1 Answer

After about 30-60 minutes TV starts to hum and picture gets distorted, could this be the color wheel...???


Sounds like a sync problem due to color wheel speed. clean and lubricate color wheel motor with tiny amount of Z-Max lubricant (liquid Buckey balls, available at Wal-Mart), on each bearing. make sure wheel is free-wheeling and turns easily. Should cure problem. If the color wheel is in good shape, there is a power supply problem, which may be due to dried out electrolytic capacitors or a regulator that's failing. Troubleshooting or controller board replacement may be needed. Regards.

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1 Answer

Looking what i can do to fix. Have a Mitsubishi TV 3D DLP WD-73640, Replaced bulb, and still have the red LED flashing 6 times to the Yellow led flashing 1.


These blinks [flashes] are fault indication (Error Codes). From the number of blinks occur at one time switch ON, you can get an idea about the faulty circuit section inside it. This will make repair easy. These are called blinking codes. Make sure about the exact number of blinking of the standby/power LED, by switching On & OFF the set, for at least two times. Count it carefully. If you wish to get some details, check the site linked here. It has details about blinking codes, and fault locating procedure, to many popular brand TVs and other devices. http://electronicshelponline.blogspot.com/
Blinking codes details to many popular brand TVs are given. Surf the site with patience.
Check the lamp ballast too.

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Sounds like a main board fault. It will be best to contact the authorized service centre for Sony; in this case. If you wish to get some details; check the site linked here. Viewing it in "Mosaic" will make surf easy Pull up older posts. Surf the site with patience.
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