I my TV's got a wierd bending thing happening at the bottom and towards the top. It's more viewable when credits roll on a movie or there's a long shot where the screen might pan in a direction. Either way, it looks as if the image moves towards the screen and then slopes back. They aren't HUGE bends but they're obvious in the situations mentioned above. I've looked at the sreen (inside and out) and I recently had the service guy come out to look over the TV.
Other than the guns being dusty, he said it looked fine. He also adjused the convergence and it looks much better. I mentioned the bendy and he didn't seem to know what it would be. I had asked if maybe the speakers to the stereo might effect it and he said it wasn't likely. Mirror looked good. He also mentioned that sometimes on news stations, the ticker at the bottem may dip down or bend off. He said he could adust it to fix that but it would throw all the other channels of and had mentioned that he sees that commonly in most Big Screen TVs.
So, I'm wondering about what else could cause the bend...the main one mentioned above. I'd like to get this cured as I'm probably going to try to sell it and get a smaller TV.
Any ideas?
The bend could be caused by many different factors, but one of the most common causes is due to a power supply deficiency. Try reducing the television's contrast control and see if the bend becomes less noticable.
Another question... how old is the TV? Is it a digital or widescreen model?
65" widscreen about 5 years old...HD ready...not digital.
Yesterday I PMed someone that had a similar problem with the same brand of TV, but he was told it was due to something overheating
Hmmm... I suppose it's possible. Is the problem is apparent when you first turn on the set?
no, as I mentioed before it's more obvious when movie credits are rolling from bottom to top...or when a show has some sort of panning motion across a landscape for example
It's a widescreen TV. What format mode are you using to expand the picture to fill the screen?
Do you have access to a DVD with video test patterns?
I think I use stretched when watching regular TV and the TV reformats when I watch HD channels.
No test pattern DVDs, unfortunately.
I'm curious if the bending goes away if you use the "full" format mode or "expand".
I'll check it carefully. will report back on that thought
Update:
I started checking the format on the screen...then I thought I'd check the contrast....turns out the contrast was all the way up. so I zeroed it out, set it back to IRIS (we like IRIS) and then started looking at the other formats.
I normally use FULL format depending on the show..but I set it to the squashed format (vertical letterbox -best way to describe it) and immediately noticed that there was no bends when I foudn some movie credits rolling...I tried the standard setting...expanded, zoomed...anamorph and took at a look at some HD channels....
The result....all is well on my TV again.
So, good tip there, Matt. I appreciate it. My wife does too...since I'm not whining about it anymore. heh.
UPDATE:
Well, I may have been hasty...the bend is still there...when I went to mess with it, I set the format for the 4:3 ratio and as I recall the image looked fine...no bending or anything. I'm thinking that this has to do with using the full screen modes. Is this possible?
Additionally, I've had that problem with the some of the news channels wher the ticker is half off the bottom of the screen rendering it unreadale. The Tech guy from Tweeter said that he sees that with a lot of big screen TVs (which may be possible...or at least he's NOTICED it) and that adjusting for that channel would make that channel look right, but would make all the others. So, I'm not sure if he just didn't know how to do it or didn't want to...I mean the service call was free anyway so I should be able to get them back again, but still. I'm a bit bugged by this TV now.
And this warped look is only really obvious on shows where there's a slow movement...aerial shot of something or top to bottom rolling credits.
Any thoughts?
I have a Silver Series and it too has the "bends" It started earlier this year but went away after a little warm time. It has become progressive in nature and I may have to have someone in to look at it.
How have you made out with yours?
I have a Silver Series and it too has the "bends" It started earlier this year but went away after a little warm time. It has become progressive in nature and I may have to have someone in to look at it.
How have you made out with yours?
well, I read on another forum that this problem is common with the Mitsubish RPTVs...has to do with the convergence chip or something. When I got my TV, we got a service plan with it so I'm gong to check tomorrow to see if it covers actual repairs that would otherwise cost money...this repair would be in the 200 - 300 range...which I'm okay with...I just want it fixed....
I'd actually like to get the access code to get to the menu where the advanced settings are...they should be like a computer monitor (pinchusen, zoom, position, etc). I'm thinking access to that (which I think the service techs use) along with an AIVA DVD will help set that TV up perfect.
Sounds like an avenue. I may get a tech in here and get it looked at. I'll post if I find anything out.
Thanks!
Its probably a problem in the convergence or a capacitor, as alot of these sets have bad capacitors, in the Pincussion cicuit. Like matt stated try to put a cross hatch from a DVD on it. Anyway its not a problem a consumer can repair them selfs Good luck
I HAVE A MITSUBISHI VS-6043 PROJECTION. THE PROBLEM BEGAN AS A SCREEN THAT WOULD WOBBLE OR MAKE A FUNNY SHAKING FOR A MOMENT. THEN IT WOULD DO THE SAME THING THEN GO BLACK WITH ARCHED SHAPED BRIGHT LIGHTS GOING ACROSS THE SCREEN. IF YOU TURNED THE TV OFF AND BACK ON IT WOULD GO BACK TO NORMAL MODE, BUT AFTER A FEW MINUTES WOULD DO THE SAME. NOW ALL I GET IS A BLACK SCREEN BUT AUDIO WORKS.
Oh that sounds like a vertical sweep fault, or the sweep power supply that feeds the vertical output IC. Thats a common problem with projection sets when there is No Picture but the sound works. This is not a repair for the amature or hani-man to attempt, as if you try and fix this, you could severly damage the face of the Picture tubes, if they already dont have burn marks across them. I wouls first have the vertical IC replaced. With the three picture tube sockets off the tubes, I would check the vertical waveform and make sure the vertical drive was there abefore I let the piture tubes light up to prevent any damage. If the vertical sweep was not there, I would check the power supply source and trace it back through the circuit to see where I lost it at. Like I said if you have no TV repair experience, play it safe and seek the help of a trained servicer to assist you in this repair. Good Luck, and let us know how you made out.
is it possible that this could be caused by a bad pip card?
It is a possibility I guess, but you said the set had an intermittant problem with bright line on the screen.
I have had the problem fixed. The symptoms on my WS 55819 Silver Series are not unlike every post here. There was a bending toward the center at the top and bottom of the set with a separation of red blue and green with ghosting on images and text. The symptoms, went away after a while and returned intermittently.
Because of the intermittent nature of the problem it was difficult to diagnose,but my tech was able to recreate the problem. Here it is guys: He replace BOTH amplifiers in the pincussion circuit. While he was getting good values on his readings,the intermittent nature would have masked a problem with either or both so we replaced each one to be on the safe side. The bottom line...$250.00 parts and labor, along with some tweaking and convergence adjustments. It totally eliminated the problem and the picture has never been better! Hope this helps.
techie123, thanks soo much for sharing your experiences with us!
Guys,
I've got a 65511 that sounds like it has a similar pincushion problem, but before I break out the philips screwdrivers and multi-meter can you give me an opinion of this display issue?
<a href="http://www.flickr.com/photos/62883253@N00/945701358/" title="Photo Sharing"><img src="http://farm2.static.flickr.com/1118/945701358_8419d00ee7.jpg" width="500" height="375" alt="DSC01836" /></a>
krp, if this problem is intermittent, find the two convergence IC's and resolder them. I have seen this a thousand times, and have heard techs say they replace the IC's but only resolder them. Now if the problem persists after the IC's are re soldered, then of course you will need to unsolder the two chips and replace them with new ones. Do not buy any old replacements though. You will look around and see these convergence ICs for like 5 to 8 bucks. Stay away from those cheap after market type of IC's , as every IC, even with the same numbers are not alike. Make sure you buy only the SANYO replacement ICs for your TV set. You can get almost any replacement convergence IC, that is the original Sanyo IC from mcmelectronics.com If you do not, you will have another breakdown soon down the road. Also, do not forget to install a nice amount of heat sink compound on the backs of the new IC's before you install them. As always, if you have no solid state or printed circuit board repair experience, play it safe and call in an authorized Mitsubishi service man to come in and assist you in this repair. Good Luck, and let us know how you made out with this repair.
Larry, That is an encouraging bit of news. Yes it is an intermittent problem. It sometimes gets worse and occasionally is almost normal. Before I go plunk down 30 bucks for the service manual do you have a picture of the back of a 65511 or 55511 that would point me at the circuit board that convergence ICs are on?
krp
Yes I do, but you are getting away really cheap then. but it will depend on your next answer. How much solid state repair experience do you have with solid state repair technology. And do you know if this TV set use what chassis number? Also can you tell me what the normal voltage is on a convergence IC? Naw Just kidding, but you take full responsibility for your TV set. And where would you wish to have this service manual sent to?
D'oh! of course that would help... [email protected]
Larry,
Sadly my mailbox remains empty, did you get a chance to send that email to [email protected]?
or can you let me know which of these heatsinks is for the convergence ICs?
krp
Drat, the forum software clipped the right side.
Look at the large metal plate on the left board with all of the fins on it. Look on the other side of that. There should be two black IC's on that that need to be re soldered. Please if you have no soldering experience, get a friend or neighbor to do this for you. This is not the place to be experimenting with. I did send the manual, but it came back as undeliverable and I try once, if it does not go through, I will not try again unless asked to. If it fails this time, its your end, and you will need to straighten it out.
Thanks Larry, the second try worked like a charm and the attachment arrived with the email. (I hate AT&T's email.) Thanks for the words of caution, but since I'm usually the friend that others ask for soldering help I guess I'm going to be the guy doing it this time too.
krp
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