TW600 Green tint-should i be worried

[Raja]

Hi all,

My TW600 has just clocked 60 hours and last night i noticed a green area on the screen. Its located right of centre at the top. from the centre it gradually fades away towards the edge of screen. Its roughly 500 in diameter (but not a circle-no definite shape to it) It is a very slight green tint. Lens is clean. It also seems to show up more when first turned on and is less noticable when the PJ has been running for a while. Definately noticable when displaying the grey scale.

Any ideas? or similar experiences? Will this go away or should i call Epson straight away.

Regards,

John

[ajm1503559545]

Sounds like a dust blob. Not sure how Epsom recommend you deal with that but best to find out before opening anything.

[Brendon]

Sounds like a dust blob. Not sure how Epsom recommend you deal with that but best to find out before opening anything.

I had the same thing took it to the local service agent it was cleaned out and I picked it up next day ,nil charge.

Another friend of mine had a similar problem and had his PJ exchanged by the store where he had bought it.

I suspect these blobs are swarf from the manufacturing process.I have put over 200 hrs on my unit since this happened and no further problems.

Brendon

Edited March 5, 2006 by brendonc

[Tweet]

Raja,

Dust particles or dust blobs become much more obvious if you vary the focusing of the lens through to its extremes while the screen is illuminated but still dark ( obviously without any projected image).

Colour abberations can result from slight misaligned of the optics or even ageing of the LCD panels. This can happen over time through vibration from bumps and heat from the lamp, normal wear and tear can bring it about.

C.M

[Raja]

Hi all,

Update on my green tint problem.

Turned on PJ last night and the green tint area has disapeared (phew!!). If it was a dust blob, it has fallen off. If it was on the lens or on the panels then it has worked its way free through no action on my behalf-other than turning it on and off. Grey feild displays a solid grey again, no colour uniformity issues.

Thanks for the input.

Regards,

John

[BrisVegas85b]

Hi all,

Update on my green tint problem.

Turned on PJ last night and the green tint area has disapeared (phew!!). If it was a dust blob, it has fallen off. If it was on the lens or on the panels then it has worked its way free through no action on my behalf-other than turning it on and off. Grey feild displays a solid grey again, no colour uniformity issues.

Thanks for the input.

Regards,

John

In respect of my TW600, I definately have slight colour issues with a slight red tinge just left of centre with a slight blue/green tinge just right of centre. It is not very noticable but you do see it ever so slightly on white

backgrounds ie. snow in winter olympics broadcast etc. On avforums there is mention of some issues with the 520 and some US buyers have had issues with the 550. I think some of them feel that the issue gets worse as time goes by and could be heat related. The fan in my eyes shuts off too quickly . Not an issue to get too alarmed by but certainly something I am going to keep a close eye on for the first 100 hours or so. Will be going back to Epson, if it gets any worse (or more noticable) in my opinion.

Apart from that ****, I am more than happy with the TW600. Have adjusted Living Room and Natural settings also of late using DVE and the THX optomizer and am happy with those settings now as well.

Contrast seems always way too high at the default values.

Anybody else had issues here in OZ with their TW600 and colour issues.

Mr Sheen

[Shadowplay]

I've had my TW600 for three months now and when I turned it on the other day and selected the display position pattern I noticed that the left hand side had a red tinge. It definately wasn't there before, at least not to that extent. My unit has done about 170 hours.

When selecting the grey scale pattern you can really notice the difference between the two sides. I rang Epson and was told to remove the lamp and then replace it and see what happens, if that doesn't work take it to the service agent. Removing the lamp didn't do anything, so it looks like it has to be fixed.

Also how does everyone find the convergence on the projector? I'm not sure whether it is a convergance or optics issue but when looking at the test patterns up close edges seem to have red on the left and green/blue one the right. It's only viewable when looking closely at the image, I wounder if this might be related.

[Brendon]

In respect of my TW600, I definately have slight colour issues with a slight red tinge just left of centre with a slight blue/green tinge just right of centre. It is not very noticable but you do see it ever so slightly on white

backgrounds ie. snow in winter olympics broadcast etc. On avforums there is mention of some issues with the 520 and some US buyers have had issues with the 550. I think some of them feel that the issue gets worse as time goes by and could be heat related. The fan in my eyes shuts off too quickly . Not an issue to get too alarmed by but certainly something I am going to keep a close eye on for the first 100 hours or so. Will be going back to Epson, if it gets any worse (or more noticable) in my opinion.

Apart from that ****, I am more than happy with the TW600. Have adjusted Living Room and Natural settings also of late using DVE and the THX optomizer and am happy with those settings now as well.

Contrast seems always way too high at the default values.

Anybody else had issues here in OZ with their TW600 and colour issues.

Mr Sheen

Hi Mr Sheen.

I would get your unit looked at by the service agent.Epson and local dealers here in Perth at least have been very quick to respond to minor colour probs. I dont think you should have to put up with any patches of colour defects.I have not heard of any local units actually having panel misalignment as reported in US.

Most problems appear to be dust or swarf from manufacture getting on the lcd panel.

Brendon

Whoops Michael 's post appeared whilst I was typing my reply that certainly does sound like lcd convergence as reported in US

Edited March 6, 2006 by brendonc

[Mousie]

Folks

Count me in two as at 40 hours there is a very faint red bias to the right of screen (roof mounted) and blue/green on the other and I am a fussy bugger and this appears to have happened overnight, its very slight but noticeable hence we are all having similar issues, I'll keep an eye on it for a forthnight to hopefully find out the fix or its back to epson, so people are not alone here but don't panic, it is still a darn good projector

Mousie

[Raja]

Oh Bugger! its back. Fired her up couple hours ago and noticed the green tinge again!! Same place that it was a couple of nights ago. But it definately was not there last night. Very odd!! As others have noted its noticable when the grey display position pattern is on screen and in the grey scale patttern, but i do notice it at varying times when watching DVD's. And of course, now that i know its there my eyes are drawn to that part of the screen and i find myself constantly checking if i can see it or not (but i can). I'll monitor over the next couple of days and if it persists, i'll call Epson. I have not noticed any other colour tinge with my unit (fingers crossed) and i find the convergence on my unit to be good-the white grid lines in the position pattern have no colour fringing.

I must also say that it is only me that sees it-the better half hasnt mentioned it and i'm not going to point it out unless she queries it!

Regards,

John

In respect of my TW600, I definately have slight colour issues with a slight red tinge just left of centre with a slight blue/green tinge just right of centre. It is not very noticable but you do see it ever so slightly on white

backgrounds ie. snow in winter olympics broadcast etc. On avforums there is mention of some issues with the 520 and some US buyers have had issues with the 550. I think some of them feel that the issue gets worse as time goes by and could be heat related. The fan in my eyes shuts off too quickly . Not an issue to get too alarmed by but certainly something I am going to keep a close eye on for the first 100 hours or so. Will be going back to Epson, if it gets any worse (or more noticable) in my opinion.

Apart from that ****, I am more than happy with the TW600. Have adjusted Living Room and Natural settings also of late using DVE and the THX optomizer and am happy with those settings now as well.

Contrast seems always way too high at the default values.

Anybody else had issues here in OZ with their TW600 and colour issues.

Mr Sheen

Mr Sheen,

Would you care to share your settings for living room and natural modes?

Regards,

John

[Shadowplay]

Now I'm a bit worried that the convergence on my unit isn't right. I have the display position pattern on, 1x zoom and no lens shift, and the projector about 4m from the screen. When right up at the screen the white lines have colour fringes to them, they aren't really noticable when back from the screen but up close you can't miss it. Does anyone else have this? Apparently there is a difference between convergence issues and optical ones, which can't really be helped.

[The_Preacher1973]

Now I'm a bit worried that the convergence on my unit isn't right. I have the display position pattern on, 1x zoom and no lens shift, and the projector about 4m from the screen. When right up at the screen the white lines have colour fringes to them, they aren't really noticable when back from the screen but up close you can't miss it. Does anyone else have this? Apparently there is a difference between convergence issues and optical ones, which can't really be helped.

If you can't notice it from your seating position than it's not much of an issue. If you can only just make it out when standing close to the screen, looking for the problem and running a x-hatch test pattern to highlight the problem then you really don't have much to worry about.

All these things will have different manufacturing tolerances. As for how far out of alignment is too far well I don't really know. If it was out by less than 1/4 pixel that would be close enough for me.

ALL LCD PJ's will be out by some amount. It's just that some will be out by such a small amount it's not noticeable with a test pattern. I posted some pictures last month showing convergence problems with the Sony Ruby. Some of those panels were out by 2 or 3 pixels. That's not good enough. But if you can only detect some slight colour fringing when staring at a test pattern, well if that's not good enough for you than I'm afraid you have unrealistic expectations about what the technology can provide at that price point at this time.

[Mousie]

Preacher, your on the money there as most of us are noticing this after the blinding we got from all those moguls hi hi. Personally, whilst I have noticed this, I'm not too keen yet to have someone else pull it apart unless necessary. When the movies are on, I tend to look for this but I had to tell the family and even they couldn't care given its only very minor issue.

How does a tech fix this, is it a mechanical issue or software driven?

Mousie

[The_Preacher1973]

Preacher, your on the money there as most of us are noticing this after the blinding we got from all those moguls hi hi. Personally, whilst I have noticed this, I'm not too keen yet to have someone else pull it apart unless necessary. When the movies are on, I tend to look for this but I had to tell the family and even they couldn't care given its only very minor issue.

How does a tech fix this, is it a mechanical issue or software driven?

Mousie

It's normally mechanical. They need a jig to realign the panels.

Now I'm not saying that panel alignment isn't a problem, if it's too much and is visible in the picture when watching a movie then I'd be taking it back. I'm just saying that if the problem is only visible from close up while displaying a test pattern then people may have champagne taste and a beer budget. Unrealistic expectations. $10,000 PJ's exist for a reason.

Of course if you don't want to have issues with panel alignment then buy a DLP. If you don't want to have problems with rainbow effect either then buy a CRT. If you don't want to have issues with haloing and burn in then buy an LCD...

Guess what? The perfect PJ hasn't been built yet. If it was we'd all already own it! Enjoy what you all have! I'm sure it beats the heck out of a $2500 plasma!

[glennb]

Now I'm a bit worried that the convergence on my unit isn't right. I have the display position pattern on, 1x zoom and no lens shift, and the projector about 4m from the screen. When right up at the screen the white lines have colour fringes to them, they aren't really noticable when back from the screen but up close you can't miss it. Does anyone else have this? Apparently there is a difference between convergence issues and optical ones, which can't really be helped.

This is pretty normal for most PJ's, and if you get ever get a chance, you can do what I did and go around all the PJ's that are setup in decent retailer and you'll find that all of them suffer the color shift on each side of a pixel, to different degrees. My TW600 has this and is only noticable if you are about 1 ft from the sreen whilst looking at text or the PJ menu.

If your PJ can produce a single pixel width line with sharp edges, it's not a convergence issue and you'll just have a bit of extra color either side of the line. If the line itself is about 2 pixels wide (or more) then it's convergence issues.

I've actually got some photos of my TW600 with convergence and color shift problems before I sent it back but can't be bothered working out how to post them . The globe assembly was replaced to fix the convergence issue, but the color shift is exactly the same. Not an issue for normal viewing either.

[Shadowplay]

I noticed the colour fringes on the test pattern when I first got it. I wasn't really worried about it as I don't think it is a convergence issue, more chromatic aberation I think they call it. But as someone mentioned the red tinge to the bottom left (NOT ceiling mounted) appeared overnight and was easily noticeable on the test pattern. The right side of the picture looks fine. You can notice is during viewing, such as the snow scenes on 7's so called HD loop.

I will be taking it back to the service agent. Apart from this I am very happy with the projector and would still recommend it.

Edited March 7, 2006 by Michael_blph60

[Raja]

I'm not too keen yet to have someone else pull it apart unless necessary.

Mousie

I feel the same way Mousie. While my green tinge area is ever so slight and now seems to dissapear after the pj has been running for half an hour, i'm not sure that i want someone pulling it apart to attempt to rectify this. Who knows what other picture quality issues this may introduce. And anyway, i still have 23 months warranty left!

Regards,

John

Enjoy what you all have! I'm sure it beats the heck out of a $2500 plasma!

Amen!

[glennb]

Speaking of TW600's, does anyone else notice a fair bit of noise coming from the dynamic iris? I seem to get a lot of fluttering vibrations when watching shows with dark backgrounds, ie. CSI, was causing a lot of noise from the iris. It was actually louder than the fan noise

It goes away if I disable the dynamic iris, but does anyone else notice this?

[Raja]

Speaking of TW600's, does anyone else notice a fair bit of noise coming from the dynamic iris? I seem to get a lot of fluttering vibrations when watching shows with dark backgrounds, ie. CSI, was causing a lot of noise from the iris. It was actually louder than the fan noise

It goes away if I disable the dynamic iris, but does anyone else notice this?

Yeah, i notice it on mine as well-particularly in quiet scenes. But at the moment my Pj is sitting about 12" behind and above my seating pos, so quite close to my ear. I suspect that when i ceiling mount the PJ i wont notice it. When i place my hand on the pj case near the lens shif dials i can also feel the iris working. For me it sounds like someone very very lightly drumming their fingers on a table, but definately louder than the fan noise in low lamp setting. I dont recall reading about any iris noise in all my research. 99% of the time i dont notice it.

I'm still undecided as to watch with iris on or off, for my eyes the difference is slight.

Regards,

John

[glennb]

I don't really notice much difference either with it on or off, but the unit is sitting on a shelf about 1.5m directly above the seating position so the noise gets distracting unless I have the volume up.

[The_Preacher1973]

I don't really notice much difference either with it on or off, but the unit is sitting on a shelf about 1.5m directly above the seating position so the noise gets distracting unless I have the volume up.

You guys need to buy air conditioners. Fixed the noise coming from the 12 fans in my PJ!

[Raja]

You guys need to buy air conditioners. Fixed the noise coming from the 12 fans in my PJ!

Yeah, airconditioner and KIDS!!!

[Shadowplay]

An update on my TW600:

I took it to the service agent last week and got it back yesterday. They replaced the optical engine, which sounds like a pretty big thing. Anyway the red tint has gone and it also got rid of a green stuck pixel.

Edited March 18, 2006 by Michael_blph60

[The_Preacher1973]

An update on my TW600:

I took it to the service agent last week and got it back yesterday. They replaced the optical engine, which sounds like a pretty big thing. Anyway the red tint has gone and it also got rid of a green stuck pixel.

Nice to hear. Epson seen to turn these things over pretty quickly.

[Raja]

Nice to hear. Epson seen to turn these things over pretty quickly.

That is good to hear. I still haven't decided whether to contact Epson about my green tint as it seems to disappear after about 15 minutes of operation. I check this on the 'greyscale' at start up where the green is very noticable and after 15min, again checking on the 'greyscale', the geen is all but gone. Even at its worst i only notice it on pale blue sky or grey (clouds).