2009 Mitsubishi Owners Thread (C9/737/837) - Page 366

never mind its not a hd graphics card

While trying to fix my problem as earlier stated. It appears I have dust under the lens. As I try to wipe the lens off with the TV on I can see dust particles inside the lens. Is there a way to remove the plastic piece and safely remove the dust? Thanks for any assistance.

While trying to fix my problem as earlier stated. It appears I have dust under the lens. As I try to wipe the lens off with the TV on I can see dust particles inside the lens. Is there a way to remove the plastic piece and safely remove the dust? Thanks for any assistance.

If you pull the light engine out, the lens has two screws for the lens shroud and then you disconnect the cables from the board (837 has 2 cables coming from the lens) then there are three screws that hold the lens to the chassis of the light engine. You can clean both sides of the lens from there.

If you are that far into the whole thing you might as well take the entire thing apart and clean it piece by piece and apply new thermal grease. Because, if you have dust inside the lens somewhere, your engine is probably filthy with dust.

Does anyone know of any instructions or pictures of this procedure. I have viewed the photos of blooming in the 2007 models and that is my issue also. In 2007 they state it is an internal mirror has haze on it. Has anyone had this problem with a 73c9. Thanks

There is really no way to get into that lens to the area the lens gets hazed up. The screws are adhered to the plastic masking that tutorial found on this site useless.. If you wanted to take a drill to your TV lens, sure. Better to just find a new lens. The part number is on ShopJimmy.com



I have pictures of the entire job. Which would you like pictures of?
Edited by AnthonyB - 3/18/13 at 10:53am

OK so do I need a whole new light engine. The tutorial I watched only works on the 2007 models then? Did u have a similar issue? Thanks

No, just a new lens.. On these year TVs almost everything in the light engine is replaceable. Including the color wheel. I have worked on 6 TV's and it seems that the light engines only have a tiny bit of difference, really don't know why they all have different model numbers on the engines themselves but I am sure that there is a difference.

The DMD Board is the same part number from the 837 to the 737. The bulb is the same for all models, the ballast is the same, the color wheel is the same, so I am guessing it's the lens is focused differently. The next time I have two different size TV's apart I might try the lens from one on another..

Anthony, are you saying that the problem with the halo effect on the 2007 series. Can not be fixed on the 73c9? Have you seen these problems with the 2009 models. Thanks for the help.

I am saying it can be fixed but you're going to have to take a drill and a titanium bit to the three screws that affix the lens together. They are adhered to the plastic, plus they are really really weak screws. So, once you get the screwdriver small enough for them, they'll just strip anyway because the glue holding them down.

I just looked around, $112 is about the average price. Not that bad. Better than a DMD Chip.

OK I understand now. Do u know the part number at shop jimmy I will order one now

I didn't say they were available at ShopJimmy, I said you could get the part number

491P240010

http://www.encompassparts.com/item/8008652/Mitsubishi/491P240010/Lens-projection

I was wrong about the price, but still cheaper than a DMD chip.

Thanks

Anthony, I took my light engine out to clean the lens. Picture much better but my problem now is picture has a black back across the top

Any idea? Thanks

The lens isn't on right or you didn't put the light engine in properly.. My guess is the second one.. It goes in wrong sometimes

Anthony, Would the three screws still lineup on the light engine if I installed it incorrectly? I went to the geometry screen with no luck. The screen moves upward but still wont project on the half inch black bar I have running across the top of the tv. Any idea? thanks

Yes, the screws will still line up oddly enough. It's a hit or miss thing, basically when it's in there right, you'll feel it go to a nice tight fit.. I cannot really explain it, It just feels differently and makes a different sound once it's in there. I just took my light engine out this past weekend, it was a little crooked. The best thing you can do it find a way to trip the lamp switch and play with it while it's on.

Just be very careful. That lamp doesn't like to be moved while it's on.

Thanks will try again

I have tried several times to reinstall the le with no luck. I still have approximately a half inch black line going across the top of my TV screen any other ideas? I am at a loss. When I go into the geometry menu it won't even move the screen up that high.

You must have something wrong with the way you put the lens or lens shroud on.

The only thing I noticed is on the clear plastic piece that covers the lens. One side is smooth the other side has a raised piece in the middle. The lens cover fits in either way. Are u aware if that clear piece matters which way it is put on?

The black plastic piece that covers the lens with the three small black screws can only go on one way correct? Thanks

Oh you messed with that? I don't know. But, the lens shroud is the piece that goes around the lens that you had to tear the foam to get off might not be aligned right

Is their a proper way to align it? Or just trial and error. Thanks for all our help.

I have never messed with that lens cover. Did you take pictures? Here is what it should look like..

Hello again!

I'm surprised this thread is still active.

But since it is, I think I'll share my 737 experience.

I originally had one problem, excessive blue in the picture. Turned out I was viewing from too low an angle. Surprised Mits couldn't have told me that when I complained. Anyway...

I had the light engine start to go last year with the white pixel issue. I got a new engine and a new bulb at a very reasonable price. If you have ever changed the cpu in a PC, you should be able to do a light engine.

The firmware hack came to my attention just recently (it's why I'm here). It's easy to do and will turn on (or off) features that you may want (or not). You can use it to disable the iris (since it sucks). The process is fairly simple. I have flashed mine several times now trying to get it just right.

It's 2013 and I have spent an additional $300 on my unit since I purchased it. It may not be as bright as the 55" 2012 Visio LED I have upstairs, but the color is much better.
Oh, and it's bigger too.

Still happy after all these years.


PS. If you are an expert on the firmware, drop me a line. I have a couple of questions.

There's a firmware hack? Unconsecrated and warranty voiding, I imagine?

Yes, the instructions were here somewhere but I can't find them now. It's pretty simple though.

Extract the firmware build from Mits. http://www.mitsubishi-tv.com/support
Extract the TVapps.tar file.
Edit the xml file, I used Word.
Rebuild the TVapps.tar file. I Used 7zip, it's free.
Copy your modified build to a USB stick.
Apply firmware using the instructions you will find on the same page as the firmware. Follow the instructions!

I have flashed mine several times trying to get it the way I want it and there haven't been any problems. But I make no guarantees.

And yes, I'm sure it would void your warranty.

Here are the items listed in the xml. Set the value to 1 to turn on, 0 to turn off.

TAG_Support_System5>0System5>
TAG_Support_WiredIrCtrl>0WiredIrCtrl>
TAG_Support_OpenCable>0OpenCable>
TAG_Support_HDMI4>1HDMI4>
TAG_Support_HomeRetail>0HomeRetail>
TAG_Support_TVGuide>1
TAG_Support_MediaPlayer>1MediaPlayer>
TAG_Support_MLink>1MLink>
TAG_Support_ISP>1ISP>
TAG_Support_ISP_Calib_Mic>1ISP_Calib_Mic>
TAG_Support_Smooth120>1
TAG_Support_SmoothFilmMotion>1
TAG_Support_PerfecTint>1
TAG_Support_3DGame>1
TAG_Support_SharpEdge>1
TAG_Support_DeepFieldImager>1
TAG_Support_BackLight>0
TAG_Support_BlueGlow>1BlueGlow>
TAG_Support_ChannelEditRename>1
TAG_Support_ChannelFavorite>1
TAG_Support_ChannelLock>1
TAG_Support_SoundMode_Music>1
TAG_Support_PictureMode_ADV2>1
TAG_Support_PictureMode_Cinema>1
TAG_Support_ColorTemp_Medium>1
TAG_Support_Shutter>1


If you turn something on and your tv just isn't capable, it might lock up on you. Mine did on Backlight, I think. Just reboot the tv to fix it. Then reset that feature to 0 in another flash. If something just doesn't work, your tv isn't capable of that feature.

One other thing, it's possible to turn on more features than your menu screen can display properly. It may push an icon off to the right. But it still works.

My 65C9 in the last month twice I turned it on and got the blinking red light. Anyone know whats causing this? I had to pull plug for 30 seconds and tv worked again.