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Mitsubishi WD-73727 Flickering/color displacement

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Old 01-25-2014, 12:07 AM   #61
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I have a WD65C10. I just ordered a light sensor for it (and thank you for all the great info from everyone in this thread) but I was wondering if there is a cheaper alterntive to the 938P179010 fan? The one shaped like a blower rather than a typical computer fan. When I look for that specific one by part number its usually $25-30.
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Old 04-08-2014, 09:07 PM   #62
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Quote:
Originally Posted by brentburrows1 View Post
So, I bought this WD-73727 Mitsubishi 73 inch DLP off of some guy on Craigslist that was moving out of state for $375. He wanted $700 for it, but when I showed up and plugged it in it did not work. The l.e.d. on the front of the TV indicated it had a bad bulb. I ended up talking him down to $375 since I had to buy a bulb, and we made the deal. He told me that he had owned it for two years, and had no problems with it other than having to replace the lamp once. He said he really liked the TV, but could not take it with him, so he had to sell it.

I got the TV home thinking I had just made a slammer deal. I was going to purchase a bulb, and was going to watch the Super bowl on a 73 inch TV!! I purchased a new bulb ($200) in town, and installed it. I powered the set up; bulb seems to be working great...... but minor problem, the whole TV flickers! It seems to only have blue and green colors coming and going on random parts of the screen while it appears the screen is split down the middle, while independently jumbling, glitching, and flickering. I can still see media on all inputs, the tv just acts like its getting a scrambled signal. If I dissconnect all inputs....the same thing.

I can bring up all of the menu options, and see them, but it is difficult to look at the screen because of it flickering so much, almost like a strobe light in certain places. I hooked up all inputs with the same results. everything played, but the screen flickers with the color all screwed up.

I found nothing in the owner's manual that would help, so got on the net and started researching. I downloaded the service manual. I went through all of the troubleshooting procedures in the service and owners manuals, and nothing. Another interesting fact, is if I leave the tv on long enough it will just shut down on its own. When attempting to get an error code from the tv when this happens, it just flashes #12, (nothing wrong). So, what's next?

After reading multiple posts in multiple forums, I have tried everything. I have re-seated the dvi cable going to the light (optical) engine with no good results. I have done manual hard resets on the TV. I have reset all possible options to factory default. I have made sure that all cooling fans were operating. At this point the problem is looking more and more like a light engine problem. Unfortunately, I cannot find anywhere on the net that has the part # 938P019010 in stock. I have no problem fixing this myself, but need access to the part. Do you know where I could get one? Do you think something else on the TV may be at fault? after the new bulb, I now have a $575 paperweight, and am starting to think I took a bad gamble trying to fix this thing. I have no problem putting some money into the set, but man....I'm getting closer and closer to the cost of a brand new 73" DLP.

Do you think I have a shot at getting Mitsubishi to repair it for free since they lengthened the warranty on the sets for defective light engines? The manufacture date on the TV was Oct. 2006. So I am hoping it was not purchased till early to mid 2007. However, since I purchased it second hand I do not have a receipt. Would this be a problem? I have written the guy I purchased it from to get the receipt, and he is trying to find it with no luck yet.

Please help.......any suggestions? Am I on the right track? Is this a lost cause? Will my dreams of having a 73" TV in my living room die? Please help.

Brent
I've seen this problem before, I've replaced the color wheel , it's about $100 , and it took care of it.
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Old 08-21-2015, 10:03 AM   #63
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rapid share now gone - any way to get your diy fix
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Old 01-10-2016, 10:05 PM   #64
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This is the first post that shows up when searching for this issue so I thought I'd share my fix here.

I recently picked up a WD-73638 for $100 that had the color wheel issue.

While some use the Sharp GS2P40 photo sensor, mine used the GP2S70 which is the replacement for the former. The difference between the 2 is the new one is a surface mount part vs the thru hole design of the older one and is not easily replaced. Digikey etc have the 70, you have to get the 40 from China via eBay.

However my TV would work fine for about 1 minute before the colors would shift and flicker. I did purchase a used color wheel off ebay, however that one would work for about 30mins before it would go bad as well, luckily the seller refunded me so I wasn't out any money there.

Since I now had a spare color wheel and knew it was a heat issue I decided to play around with the issue While I tried to find someone who could replace the SMT Photo Sensor.

So I took the sensor board off the color wheel and used some Arctic Silver 3 thermal compound that I use on heatsinks and some Super Glue and experimented. I put the super glue around the outside edges of the sensor to insulate the exposed contacts since the thermal compound is conductive.

After that dried I put a decent sized ball of thermal compound on the side of the sensor closest to the large indexing hole, I then trailed the compound over to the holes. I then reattached the sensor to the color wheel. I also put it on the feet of the color wheel where it attached to the light engine.

I did all of this with the color wheel that would only work for a minute and I'm happy to say that it's been running strong all weekend.. So far it's been on and problem free for the past 10 hours today alone.

Be careful not to get any on the top of the sensor tho or you'll just end up blocking the leds and ruining it.
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Old 04-19-2016, 01:25 PM   #65
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Default Mitsubishi WD-73732 - How to remove the color wheel?!?!?!

Quote:
Originally Posted by liberator21 View Post
Brent,
I had the same problem with a WD-73732.
After about 45 minutes to an hour, the picture would flicker, and skin tones would be purple/blue. The problem is the color wheel. More specifically, an optical sensor on the side of the color wheel. All the heat inside the housing causes the sensor to fail. I changed out the sensor, and my set works great. Next step is to modify color wheel cover for better cooling. I can give you more details how to test this, but it is a bit of work.
*** I see that you were able to get inside and clean your color wheel or replace the sensor. I have tried to remove the light engine and clean the color wheel, but there is something holding it in near the back left of the light engine... I can't get this thing out to save my life. If I could do that, I could follow the steps to clean it and re-install it.... I really believe this is the fix I need... I just need assistance with how to remove the light engine.

I see it's been a while since this was posted... I hope you respond.

Thanks in advance!

Desperately seeking help
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Old 06-29-2016, 07:59 PM   #66
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Quote:
Originally Posted by Le143 View Post
*** I see that you were able to get inside and clean your color wheel or replace the sensor. I have tried to remove the light engine and clean the color wheel, but there is something holding it in near the back left of the light engine... I can't get this thing out to save my life. If I could do that, I could follow the steps to clean it and re-install it.... I really believe this is the fix I need... I just need assistance with how to remove the light engine.

I see it's been a while since this was posted... I hope you respond.

Thanks in advance!

Desperately seeking help
Take pics of yours and I'll see if it's the same as mine. I can get my 73738 apart easily.

Not sure how to fix mine yet though. Think I need a new wheel but not certain. Squawks a bit and goes bad (colors wrong flickering) after a few minutes. I tried cleaning silver/black area of wheel but didn't seem to do anything.
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Old 11-15-2016, 12:56 AM   #67
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Default Can I get a copy of the diy guide just replaced lamp and now having a same flickering

I can't get rapid share to let me see this guide u made
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Old 11-15-2016, 12:59 AM   #68
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I am so broke after this whole tv situation now I'm having the same problem off colors and flickering no turning off yet but hot in back of the TV by the bulb any help will be greatly appreciated
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