DLP Chip Repair Possible? - AVS Forum
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post #1 of 31 Old 12-28-2012, 08:17 PM - Thread Starter
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Hey guys I have a WD-73733 DLP with about 100 white and black dots all over the screen. Ive been doing some research and was wondering if these chips just burn out over time and there is any way to repair them? Is this issue caused by heat or just being at the end of its life? Could a reflow possibly repair the chip? Thanks.
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post #2 of 31 Old 12-28-2012, 08:21 PM
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A TV that old needs to be put out of its misery. cool.gif

It's either beyond repair or not even possible to repair due to its age and lack of parts, or it just wouldn't be cost effective.

If you've really done all that much research then you should already know the answer to this as this is kind of a common problem. In fact the answer you are looking for is in a thread near the bottom of the first page in this forum.
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post #3 of 31 Old 12-28-2012, 08:40 PM - Thread Starter
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Yes I understand it is a common problem. And it looks like the only way is to purchase a new DLP Chip. But I was just wondering if a reflow would solve the problem? If i purchase a new chip is there any preventive maintenance to perform so this not happen again? Thanks..
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post #4 of 31 Old 12-29-2012, 01:17 AM
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Quote:
A TV that old needs to be put out of its misery.
A fast search tells me it is a 2007 model. Five years is old??? Yea, right.
Sorry kid, that's not old. rolleyes.gif

The first question is; do you have the Service Manual? Second question, have you searched for parts?
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post #5 of 31 Old 12-29-2012, 06:21 AM
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Quote:
Originally Posted by videobruce View Post

A fast search tells me it is a 2007 model. Five years is old??? Yea, right.
Sorry kid, that's not old. rolleyes.gif
The first question is; do you have the Service Manual? Second question, have you searched for parts?

Here you go again Bruce trying to stir the pot (Have you looked up what a Darblet is yet...? wink.gif). 5 years is very old in the RPTV world. When you consider how much a brand new version of his set would cost, plus factoring in how much it would cost to fix his old 1 if he is able to and, yea, it's time to put that OLD TV out of it's misery.

In reality that TV might be closer to 6 years old since we're closing in on the period of time in which Mits typically releases their TV's (spring time).

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post #6 of 31 Old 12-29-2012, 08:20 AM
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Why don't you leave your two bit comments to yourself. If he wanted to get rid of the set, he wouldn't of asked.

What are the replacement choices? LCD? Plasma? One is a step down (or two), the other has reflection problems that needs a light controlled room.
Your mentality is just what the CEA loves, throw something out if it is more than few years old. There is no reason these shouldn't last 10 years under normal use. Just because you think it is old, doesn't mean it is or should be considered "old". Apparently you have succumbed to the 'mobile electronic toys' mentality. Throw it out in two years.

The only one that is "stirring up the pot" is you blasting out narrow minded opinions.
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post #7 of 31 Old 12-29-2012, 10:43 AM - Thread Starter
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Im going to fix the TV either way. Im going to buy a new DLP chip unless there is any possible way to fix the current chip? I only posted on this forum to ask if anyone knows if the original chip can be repaired by a reflow? If not ill buy a replacement.
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post #8 of 31 Old 12-29-2012, 12:48 PM
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I don't see any possible way to do a "repair" on something like that. Unless it is just the associated circuity that went south. I kinda doubt it's a case of cold solder joints, but you can always try.
There is a "sticky" at the top of the sub-forums page with a ton of information through links here and elsewhere that will help you. wink.gif

Good luck and post back.
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post #9 of 31 Old 12-30-2012, 11:03 AM
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Quote:
Originally Posted by gtpimp024 View Post

Im going to fix the TV either way. Im going to buy a new DLP chip unless there is any possible way to fix the current chip? I only posted on this forum to ask if anyone knows if the original chip can be repaired by a reflow? If not ill buy a replacement.

I believe I heard from someone with connections to the TI DLP group that this defect was caused by the mirrors becoming physically stuck, by a substance inside the assembly. Normally, the electrical charges are strong enough to overcome the lubricant, but they changed to something that ended up getting too sticky in the long run. Notice how this problem only began to happen in a particular generation of DLP chips. I just wonder if they realized the defect and corrected the problem. Still, $200 isn't too bad to get back to a good looking pic.

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post #10 of 31 Old 01-08-2013, 08:18 AM - Thread Starter
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So I installed my new DLP chip and shes back in great working order. What do you think the life expectancy of the new chip is? Thanks!
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post #11 of 31 Old 01-08-2013, 08:25 AM
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I suppose you didn't document the process (photos), so others could benefit?
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post #12 of 31 Old 01-08-2013, 12:53 PM
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Isn't the 73733 one of the covered models that Mitsu is replacing the DMD chip on - free parts, you pay labor (anywhere from free to $200)?
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post #13 of 31 Old 01-08-2013, 04:42 PM
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The bad DMD chips were produced by TI. They got into both Mitsubishi and Samsung DLP TVs. It seems 2007 was the model year most affected. It's not like all DLP's will have this problem, especially not the newer ones. It's similar to the capacitor problem recently, when a bunch of manufacturers got a hold of some bad capacitors from a supplier. You can read about that all over this forum is as well.
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post #14 of 31 Old 01-08-2013, 04:53 PM
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Quote:
Originally Posted by pacofortacos View Post

Isn't the 73733 one of the covered models that Mitsu is replacing the DMD chip on - free parts, you pay labor (anywhere from free to $200)?

Yes
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Mitsubishi is replacing these DMD IC chips nationwide under an unannounced kind of recall for model #’s WD60C9, WD73733, WD57734, WDY657, WD73734, WD65735, WD60735, WD65C9, WD73840, WD65833, WD65733, WD73735, WD73833, WD57733, WD65734 and others. Call them @ 800-332-2119 and give them your model, serial # and date of purchase, tell them you have the white spots, they will set up a workorder with a local Mitsubishi servicer to come to your home and replace the DMD chip. Mitsubishi will supply the part (part # 276P595010) for free, but you must pay $200 in labor. BUT…if you ask for Shantell Hebert when you call Mitsubishi, and really push the issue, she may also pay half of the $200 labor fee.
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post #15 of 31 Old 01-11-2013, 01:19 PM - Thread Starter
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I bought the chip from this website and watched the tutorial offered by them as well. While I was in there I used a can of compressed air to blow all the dust out..

http://www.shopjimmy.com/samsung-mitsubishi-toshiba-4719-001997-dlp-chip-2.htm

Also used code SJGC1311 to get an additional 15% off.. Cost me $132 total out the door with free 2 day shipping..
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post #16 of 31 Old 01-12-2013, 05:59 AM
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I see the video even tells you to take pictures. Did you? Especially since you already started a thread on it and would post back.
You cover your tracks that way. Also, if you ever had to do it again you have your own documentation.

I can't believe they wasted time showing the unscrewing of every screw. rolleyes.gif

Link added to my repair thread.

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post #17 of 31 Old 01-14-2013, 06:35 AM
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My remaining concern is the life expectancy of the replacement chips offered for repair. When you buy used, what is the source for these and how much use do they have already? If you pay for Mits to supply the chip, is the new replacement a new version that will not have this defect again in the future? I've asked people who have had their tv's repaired to document part numbers, but so far I've seen no feedback.

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post #18 of 31 Old 01-14-2013, 06:52 AM
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Are these actually used, or are they new?
Is it clearly stated either way?
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post #19 of 31 Old 01-15-2013, 05:59 AM
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My impression of shopjimmy was that he is sort of a salvage yard of used tv parts. I may be wrong though.

But I'd still like to know if Mits is replacing with a new, identical part, or if there is actually a new revision of the DMD device being used.

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post #20 of 31 Old 07-11-2013, 09:32 AM
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I have the 73" dlp tv. I appreciate all of the information on the dmd chip replacement. Contacted Mitsubishi and gave all the information to them like you said. I don't know the cost yet, they have to find a authorized service dealer in my area. They are sending the replacement chip to the dealer and are going to schedule an appointment. Thanks for all of the information and guidance.cool.gif
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post #21 of 31 Old 07-11-2013, 03:09 PM
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Quote:
Originally Posted by garciab View Post

My impression of shopjimmy was that he is sort of a salvage yard of used tv parts. I may be wrong though.

But I'd still like to know if Mits is replacing with a new, identical part, or if there is actually a new revision of the DMD device being used.

ShopJimmy sells new DMD chips for DLP rear projection TVs.
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post #22 of 31 Old 07-12-2013, 05:50 AM
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Originally Posted by Ron Jones View Post

ShopJimmy sells new DMD chips for DLP rear projection TVs.

This is good to know. For those buying from them, I'd suggest asking them to send you one with the most recent date code possible. Just to increase the chances that you get one with all the improvements/fixes.
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post #23 of 31 Old 07-31-2013, 06:20 PM
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I bought my chip from ShopJimmys for my WD65C9 at $180. and did the install myself. TV works as new.
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post #24 of 31 Old 08-01-2013, 07:19 AM
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Quote:
Originally Posted by finallyabigtv View Post

I bought my chip from ShopJimmys for my WD65C9 at $180. and did the install myself. TV works as new.

I posted this question in another thread but will try here also. Can anyone tell me if there is a clear protective plastic or something over the mirror on the replacement chips that needs to be removed prior
to swap? I replaced the chip on my 73735 yesterday and my white/black dots are gone but now I have what I will call a "screen door" effect across the whole screen that I did not have prior to replacement.
This is real noticeable on light or white background. I thought I looked at the replacement chip and don't remember seeing anything on the mirror side of the chip. If no protective shield does anyone have
any idea as to why I might be getting this now?
Thanks, Gerry
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post #25 of 31 Old 08-01-2013, 07:38 PM
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The DMD replacement is a piece of cake, but I replace/install processors in computers enough to be comfortable with it. The most critical part is keeping dust off the main lens and keeping it dust-free while replacing the DMD. The DMD motherboard has to be removed to release the DMD from its socket. There is a small gap between the DMD board and the metal tray it goes into. I put pieces of masking tape over he gap on each side and cut the tape with an Exacto knife. Doing this makes getting the board aligned correctly much easier when it is re-installed. A geometry adjustment tweak in the service menu might still be needed since there is probably a bit of socket tolerance chip-to-chip.

ggw2000. Take the back cover off again and make sure the light engine is mounted correctly. Mine caught on a plastic tab when I put it back in and I had to lift up on it a bit to get it to slide back in and catch the alignment screws. Make sure no wires, etc. got caught between the light engine and place it goes into.
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post #26 of 31 Old 08-02-2013, 11:49 AM
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Thanks for the hint! Will pull it back apart and check alignment. Gerry
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post #27 of 31 Old 11-14-2013, 02:20 PM
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Thank you for your help. I just called Mitsubishi and got my repair for Wd 73733 year 2007 for $200 repairs only. I am very pleased and I thank you for the post which allowed me to get my repairs done with free genuine Mitsubishi parts. I am glad to pay the $200 because this is a really big T.V. with lots of weight to it. I am glad someone else will do the work.

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post #28 of 31 Old 02-28-2014, 11:52 AM
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Just wanted to put my two cents worth in... Had same Spots.... Got the replacement chip from Shopjimmy.com and watched the tutorial and everything is back to working condition...  Very easy... no big deal... just take pictures and don't get in a hurry....

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post #29 of 31 Old 03-21-2014, 04:01 PM
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Anyone Have Picture Problems after Mitsubishi DMD Chip Replacement? 

 

See this thread. http://www.avsforum.com/t/1523680/anyone-have-picture-problems-after-mitsubishi-dmd-chip-replacement

 

I apologize for cross-posting, but I need to find others with new chips.


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post #30 of 31 Old 05-03-2014, 11:24 AM
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I have replaced approximately 20 DMD chips in Mitsubishi DLP TV's. When there is a display problem after the new chip is replaced it is normally because the chip isn't seated correctly.
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