Fixing Projector LCD Optics + Polarisers Explained, How To Troubleshoot projector image problem.
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- Опубликовано: 15 окт 2024
- Today Il'l Explain the LCD Projectors Optic Engine, show you what polariser is where and what it does, after this video you'll easily be able to identify any problems with your optical engine and polarisers.
Very good advice on the spot. I took the projector down and opened it up to find that a black beetle had gotten into the light engine area. Took care of removing the bug parts out with soft air pressure . Everything else was very clean but used a camera lens brush to finish up. Put the unit back together very carefully and everything lit up as it should without the spot! Thanks for sharing your knowledge.
This is great! So many repairers just say "it's not worth fixing" and it seems such a waste to throw out electronics. I got a free 3LCD Epson that has an all-yellow picture. I took it apart and found the blue mirror has come loose. I was going to chuck it out but thanks to this vid I think it will be a fairly easy fix.
Really good video, easy to understand.
Seeing the explanatino on paper then seeing the actual pieces helps a lot, thanks !
My projector has a big stain and I've been trying to find explanations on my problem and how to fix it, thanks to this I will probably be able to do it!
Absolutely brilliantly explained Max, you're a legend! 👍👍
Thanks, Max for your detailed explanation in this RUclips video. However, I would like to know what you think about the full purplish imaging projected from my 6 years ago Sony VPL-HW40ES projector. Please provide me with your opinion for this case. Thanks.
Fantastic thorough explanation. I just cleaned all the optics on my Panasonic PT-AX200U and I went a bit far lol. I removed the panels and had to realign each piece of glass with the alignment screws to get a good result. Each time I did an adjustment I had to remove the motherboard so not easy! There is a slight green color on the right edge of screen but hardly noticeable so I’m happy with it. New lamp replacement was needed after 2010 hrs, the bulb lasted me 14yrs which is amazing. Hopefully I didn’t go too far the picture looks like new. I did find what looked like a black smear on one of the glass panels so I cleaned it with a q-tip dipped in isopropyl alcohol. Thanks for this tutorial 👍
The green colour on the edge would be a misaligned mirror in the optic engine light guide
@@MaxELECTRONICS oh yes good to know thanks for getting back to me. If I sent you a photograph of my setup could you verify for me please? Do you think I went too far and should have left everything alone and not clean all the surfaces? I used isopropyl alcohol on only one lense because there was a weird smear, look like a sharpie marker but the q-tip did the trick and looks like new!
You can clean the optics inside, that’s fine, but you should never remove lcd panels from the yoke (prism assembly), you should never use chemicals or alcohol on polarisers and you should never use compressed air inside the projector optics.
@@MaxELECTRONICS good to know, I used an air compressor to blow out of the dust in the fans/power supply but not the optics, was very careful and gentle. I bought a lense cleaning kit from Best Buy and came with special brush, microfiber cloth and puffer to gently remove the dust in the optics. So far so good, my projector is working. When I was at Best Buy I saw a new laser projector. AMAZING! No maintenance on laser projector needed and no bulbs right?
Yes you can use compressor on everything but not optics.
I’m not sure some laser projectors still use optic engine, some don’t. You can RUclips “what’s inside laser projector” and you’ll see different versions.
Great video! Exactly what I was looking for, since my old EMP-TW700 projector started yesterday to show greenish contours around words and objects. According to what you've incredebly well explained, seems that the output green polarizer is burned. I'll buy a new one and try to replace it! Many many thanks!
Hi Max, brilliant video, very detailed. I have a ceiling mounted epson tw7300 projector that shows a vertical blue one third left of the screen. This line appears after a few minutes of use and generally on bright mode. It clears off while using digital cinema setting. Line appears quite late when room is cold. When I play a video of full blue screen, there is no line but is immediately visible when blue screen clears off. Line shows up as blue on black screen and shows us as pink on red screen. Any thoughts which part could be faulty? Thanks in advance
If it’s a sharp line it could be the LCD. Or could be connectors on LCD
Hey Max thanks for the great video it is very insightful. Im about to attempt to fix my projector if possible. It's a Sony VPL HW10. Currently I'm getting poor blacks and dark scenes have bad contrast. Also I have noticed that there light bleeding from the border of the image all around. Which part do you think could potentially be causing this issue?
Possibly polarisers or mirrors.
Thanks for this rare information. I have a Christie LHD700 3LCD projector that the different colours are quite badly aligned and the problem seems to be getting worse. White light is split to blue yellow and magenta components few pixels apart from each other. I guessing from your presentation that the LCDs are slightly loose inside. Do you think i could open the light engine up and get them aligned again?
It’s possible but extremely hard to align the convergence on lcd projectors
Great comments. Thanks! I have a small faint white-green spot on the lower screen section. Polorizer??
It could be piece of dust on one of the polarisers, no way of telling unless you have a look inside.
Hi Max, thank you so much for this. This helped me understand the individual pieces.
I have a question. I touched the LCD with my finger. Is there a way to remove my finger print?
LCD is not that sensitive, you can use cotton bud to wipe it, maybe mild detergent like Windex on a cotton bud, don’t spray it directly to lcd.
Good day! Thank you very much for this very clearly and wonderfully presented information. I have the same projector you are showing here. I had a green output polarizer that was burned in the center (even though we only used the projector some 200 hours...ever!) I ordered a replacement polarizer from ebay and just replaced it, following a very helpful avsforum post with photos. I am certain I put the new polarizer in the same orientation that the old one was in. However, the end result is that everything is incredibly green now. As though there is no polarizer. Does this mean that I installed the polarizer backwards in some way? Again, I'm certain I placed it the same way that I the old one was positioned. Or does it mean I was given the wrong part altogether? Either way, I think I'm in trouble, because the JB Weld that I used to glue it in is solid as a rock and I kind of over did it! I am not optimistic that I can go back in, remove it, clean the area, and re-orient it IF that's what's needed. But I'd love to know what the utterly green image usually means so that I can decide if it's worth it. THANK YOU so much. - Matt
It sounds like a wrong polarizer, if possible try rotating it 90 degrees and see if that works, usually when it’s all green it means it’s at the wrong angle or is there any chance you could have bought “input” polariser instead of “output” polariser?
@@MaxELECTRONICS Thanks so much for this reply. I sent you an email this morning.
Great video! I'm having a problem with the output polarizing filters on my Epson EH-TW5650. Would you know where I can find replacement filters please?
AliExpress sells them
@@MaxELECTRONICS Thanks for the information ! But I couldn't find the right filters for my projector. The only ones offered are suitable for the TW6700 and others, but not for the TW5650.
They may be the same, check the size. I have even swapped polarisers from different brand projectors before, all they do is polarising the light.
@@MaxELECTRONICS I've looked and the TW6700 apparently uses the same LCD matrices as the TW5650, but since I've found a TW5650 for parts, I'll try to recover the LCD matrices as well as the polarizers.
Awesome video, great explanation. With your video I was able to diagnose my epson 4010 cinema projector. My green input polarizer is completely burned thru. Is it possible to just buy the input green polarizer?
Yes, just search for green output polariser on AliExpress
Input^
Dear Max, thanks very much, my Epson projector has a problem, the whole picture is a little bit green, make the picture off color, the reason is because the input polariser? the output polariser? or the green LCD itself? many thanks.
It depends, if it’s a slight green tint the it could be input polariser out of place, they don’t usually fail tho. It could be something misaligned or fell out of place. If everything is in place then chances are it’s your output polariser, maybe check connection of the lcd to the PCB.
Amazing!! Such a great, thorough and clear explanation! Thank you so much!
Really thank you, I love projectors and I learn so much with your videos. So great 👌🙂
Hi Max thank you for the video’s, very helpful. I have an Epson EHTW9000W, it switches on,opens the shutter and fans start but, does not ignite the lamp. The lamp led then flashes red, The bulb has about 2000 hrs on it. I have the original lamp which still worked when I swapped it out, have put that back in and get the same result. Is it possible to piggy back with a multimeter the bulb wires (to check for power)when starting to confirm the bulb is the fault? Had some other faults like temp led flashing intermittently just before this occurred, and a green intermittent vertical line on the screen.
It’s hard to say what’s gone wrong, have a look at a user manual and see what does led blinks mean.
Also yes you can force start the bulb manually, PLAESE BE CAREFUL DOING THE FOLLOWING AS THERES HIGH VOLTAGES INVOLVED AND COULD BE LETHAL, IF YOU DO THIS YOU DOING THIS AT YOUR OWN RISK.
You can expose the projector ballast ( the one bulb connected to, then you will find 2 or 3 optocouplers on the board near a signalling cable, (you’ll have 3 cables going to on, one line to lamp, one for power input and one signalling) once you located optocouplers simply short out the output (opto transistor side) of the optocoupler, and see if lamp ignites, if it doesn’t try with other optocouplers, if none will ignite the lamp then it’s ether lamp or ballast.
Awesome… I have a problem with my projector epson 5010, exactly right half or the projection is blurry and color mixing is not good, seems like optical engine malfunction… do you know what could be the issue?
It’s hard to say without looking at it but it’s something to do with the engine, I suggest just have a look inside and make sure everything is in place and no loose or cracked optics.
Hello, I have an Epson 697ui and the top 1/4 of the image flickers/flashes mostly green and the rest of the image is perfect. Would this be an electronic issue or is it a bad connection or bad lcd on one of the lcds in the engine ?
Could be lcd or could be a connection, try pressing on the zif connector and see if it changes
Max, thanks very much! your explaination help me to repair my projector working well. One question, why my projector input polariser only the green one? the red and blue no input polariser on the cover. many thanks!
All colours have a polariser, just some of them may be glued in and appear as there no polariser
Hi! What projector are you using here that allows the removal of inside and outside polarizer?
TW-3500 but they all are removable
Thank you! Great video btw
Hi Max I have a Epson 3020 Powerlite with 5 yellow vertical lines running near center of the screen. I pulled apart and cleaned the unit and everything looks good. Contacted Epson and they said it might be the optical engine, but would not specify which part might be bad. Any ideas on what it could be? I am familiar with Ali Express, however would not know what part to look for to solve this problem and the internet has not been very helpful as to pinpointing the problem. Any ideas would be appreciated!
Could you send me a picture of what the lines look like to maxchristensenau@gmail.com
Please don’t share any links in comments as RUclips will remove it.
Hello. Wow! Greate video! Can you help me? After replacing 3lcd prism block on Epson EH-tw9300. I have light red-green linear gradient on image from left to right. Right part of image looks more light. When I disconnected the LCD one by one, I got the following brightness: Red +15%, Green +40% Blue +12% in right part of image. I bought another one 3lcd block and same gradient again. Is new 3lcd bad too or how I can fix that? Thank you!
Hi, try adjusting INPUT polarisers, they should have a little screw on top and they can be turned left of right, power the projector on and make sure you have fully black picture on the input first and then adjust the polarisers until you get as black screen as possible, then try colour test pattern and readjust by colour, the rest of the adjustments can be done ether from service menu or user menu.
@@MaxELECTRONICS Thank you! I tried moving the green input polarizer left and right - only the level of green in the entire image changed, not the gradient (image looks black, but on test pattern I see gradient). The official supplier also said to move the input polarizers. Maybe there is another way? - or I'm doing something wrong (or shoud move red/blue polarizers too).
Is it only gradient on one colour or all?
Can you send pictures to my email? Maxchristensenau@gmail.com
@@MaxELECTRONICS Sent 👍
Hello I have a Epson 3020 that suffers from uneven focus in a perfect aligned environment. Forum says that is the prism not well aligned with the lens.
Do u have more info? Thanks
You’ll need to check by colour, try displaying just full green screen and come close to screen and see if it’s in focus evenly (you’ll be able to see individual pixels in form of the grid) then try red and blue. It could be LCD with dirt or most commonly bad polariser, it could be still doing its job at polarising but it could be warped and causing distortion, think of it as a car with really old tint on the window, then it’s still a tint but it’s old and you can’t see clearly out of it. That’s exactly what can happen to polarisers. But first try to determine if it’s only single colour that is out of focus, if they all are then it’s the prism alignment, it could of unglued from its position, then you just need to find there it was glued and re attach it
@@MaxELECTRONICS all colours suffers from focus issues, uneven focus but not so much, left corner is not focus if i focus the center for example.
Then your inside prism not centred, it may have unglued, you’ll probably will see where the old glue markings were and realign it with them, and glue it back in place. DO NOT USE SUPERGLUE!
Thank you bro it was an important & very useful video... Good job..
I have a PowerLiteHome Cinema 5010 3LCD Epson that has, ONLY AT TIMES, one Yellow Vertical line on the far right and, at times if present, turns deep blue. No rhyme or reason. Sometimes, the Vertical line will also occur on the far left side. During start-up the black background and "EPSON" logo never shows this issue. The Bulb hours are now up to 3100. I was planning to purchase a replacement, since the manual states an Ave=~4000 hours. Any thoughts / flow-diagram on how to proceed would be greatly appreciated.
Have you done a Sony VPL HW40 with yellow screens
wow great information that is so hard to find . thank you soo much ... on my epson tw700 there is also two adjustable filters right after the input polariser only on green and red .. do you have any idea what they are for ?
Most likely if it’s between input polarizer and lcd it would be ether anti glare filter (similar coating as a lens from camera) or UV filters.
@@MaxELECTRONICS yes it is propably anti glare or uv but what confuses me is that those filter exist only before red and green lcd's and not blue ... anyway i so stupidily i messed up the tilt on polarisers while trying to clean them up and im trying to adjust them again and its so pain .. thanks again ...
So I took my projector apart (turns out spiders like hanging out on the prism?) And when I lifted the prism all the out polarizer fell out and are mixed am I screwed? Is there a way to figure out where they go?
Easiest way is to try to see where the glue that polarises were held with is matching up with frame. Other tip - red polariser is slightly different tone then green and blue. And the green and blue just try placing them in roughly and turn the projector on and see if they are match or not.
greetings Max
My Dell™ 3200MP Projector has a yellow tone to the lights when projected horizontally and vertically, and works fine when directed to project downwards. Please advise, what is the problem?
It’s probably something loose like a mirror or a lens, maybe a polariser, check that all the optics inside the engine and the yoke are in place and nothing is loose/rattling/fallen out of its place.
@@MaxELECTRONICS I am very grateful for your advice. Thank you very much and best regards.
Wow! Just Wow! This is the best explanation of how 3lcd projection works because it teaches you how things work! I came here to trouble shoot my projector and learned so much. From the video I suspect that my green tint is because of the alignment of the green input polariser. You mention it at some point. However it would really be strange since it is actually glued into place. Can it be the input polariser? Basically my projector replaces black with green...I can send you a picture if you want to explain it better. Hope you can give me some input because this is driving me crazy. Whites are fine...anything else is kind of washed out and blacks are green...
It sounds like output polariser is burnet out.
@@MaxELECTRONICS Only thing is that this would make my whites look yellow, my whites are actually very white. Do you have a mail where I can send you a comparison of an image and how it is projected?
Sure, maxchristensenau@gmail.com
@@MaxELECTRONICS will send you the image
It definitely looks major and I’d say mechanical, as in maybe polariser fell out on one side or something along those lines, make sure all lenses and mirrors and polarisers are attached properly and not loose, start with first lens near the lamp and make your way to the yoke (last polariser is right next to the prism)
hi Max, do you know the angle of the polarized filter of green? I would try to replace the film on the glass as I have no spares for it (it is always on green, sometimes on blue but it is rare). It seems to me they are 90°
I’m not too sure, I usually buy ready polarisers, I believe it is 90 degrees
@@MaxELECTRONICS you cut a polarizer? Too little for me.
I'm curious: the blue and red are also 90° but monted in a different orientation? The green I believe has a 90 plain - when I rotate 90° one on the other (both out filter) it darkens; I can't explain in any other way why the polarizer from blue or red won't work if swapped
@Momo-el5sk the green and blue can be swapped around in some cases but not always, red however always stays exclusive to red.
thanks, that's interesting: have you experience with Epson tw3000/tw3500? @@MaxELECTRONICS
@Momo-el5sk yes they all pretty much identical inside
Thank you very much ! What about an led projector with ips panel ? Cause the polarizer got burnt a bit ? Why do you need it there?
What do you mean? Why do you need a polariser?
@Max ELECTRONICS I think my projector has ,and is getting burnt. Or i hope is the polarizer film and not the actual lcd panel
Yes it’s probably the output polariser.
great lesson kindly make one that uses colour wil land also power supply repair
DLP projector with colour wheel is coming out tonight, and power supply is coming out next month, just waiting for spare parts to arrive.
@@MaxELECTRONICS waiting,best teacher
I have a tri lcd СР-Х809 Hitachi, and the screen is always white with a horizontal, thick black line on the top. I opened it up, and nothing looks out of place or broken. What could be the issue?
Could be dust on the lcd or optics (bare in mind that image is inverter upside down, so if the line is at the top of the screen then it’s at the bottom of the lcd or optics) the other cause is misaligned mirror in colour guide tunnel. Or faulty lcd.
Are there any alternative names for the 'aligning glass', need a replacement for my projector but I am struggling to find one
I’m not sure what you mean by “aligning glass” you mean the lcd convergence or prism?
@@MaxELECTRONICS Its at 2:18 I've heard it being called a polarisation conversion filter and it is mounted in a little metal frame with 3 vertical slits. With mine the polarisation layer thingie has actually burnt off making the projected image yellow. I was struggling to find any sort of replacement. Thanks for your help.
Here’s an example of what it is, I’m not sure if this item in the link is the right size for you but you can scroll down on AliExpress for “more like this” and see if you can find the right size, let me know how you go.
Just found this amazing item on AliExpress. Check it out! AU$2.73 10％ Off | Defective Rectangle Prism Dichroic Prisma Stained Glass Optical Experiment Instrument Home Decoration Art Necklace DIY Design
a.aliexpress.com/_mPGXcrc
I know it's a two year old video, but when I saw this is the exact light engine that's in my 5020U be I thought I'd post my question. Last week we noticed something was wrong with the picture, and realized there was no red. I opened it and checked looked around, I couldn't find anything, like a mirror, out of place. I put back together and tested it, now there was no green. Opened it again, nothing. Put it back together and now there was green but no blue or red. Now I played with the ribbon connectors by having them plugged in only one at a time. There is no picture at all, not even the Epson logo.
Any suggestions? Thanks, Mike
It’s definitely connection problem, try cleaning connectors with contact cleaner spray, make sure they inserted correctly and all the way in.
Thank you@@MaxELECTRONICS
Hello. I cleaned the optical block of the proctor. After turning on the projector, my red channel polarizer burned out. After reading the form, I did not find a solution - instead of the old polarizer, install a polarizing film from the LCD display. I glued the film on the glass from the burnt out polarizer, having previously cleaned it. After turning on the projector, I saw that the colors returned to normal, but the film melted again. I tried again by sticking the film on the other side of the glass. But she melted again. In what there can be a problem? I will be grateful for advice.
You’d need to buy a proper polariser from AliExpress, they are glass and not plastic.
@@MaxELECTRONICS The polarizer itself consists of glass and a polarizing film glued to it. I carefully studied the native polarizer - the native adhesive layer on which the film is glued is quite strong and thick. I had to use a solvent to wipe it off. The thickness of the native film is greater than the one that I later glued.
The strangest thing is that both the native film and the one that I glue begin to melt from above. I checked the ventilation system - it's okay. The remaining optical elements of the projector are in place. I'm even afraid that the purchased factory polarizer may melt ...
@lexraxx9043 have you checked that the blower that specifically cools them is working and there’s no obstruction? It’s very hard to laminate the polarisers a home, try buying a cheap/broken projector of any kind from marketplace and just installing any polariser from that just to see if the OEM polariser will melt
@@MaxELECTRONICS Greetings! Yes, I checked - the coolers are working fine, the air channels inside the projector are clean and will supply air. I purchased a polarizer from a different model Epson projector. After installation, it also melted... Not as quickly as my homemade filters, but still. Do you think there might be a problem with the lamp? I have 2 lamps, I have used them both, but the filters melt with either of them.
It wouldn’t be the lamp, check that all optics are positioned correctly and there’s no “hot spots”, that’s when the beam is focused in one spot, similar to lens on the sun.
I want to use L3P08 L3P09 L3P010 instead of LCX111 LCX124 LCX101 LC080 in projectors is there any method
or software that I can use
Not too sure to be honest
I'm getting a brown smudge on the left side of the screen output from my projector, is that a bad filter ?, if so what can be done?.
Is it could be dirt stuck between polarisers, or insect, try gently blowing between polarisers see if smudge moves location
Could the blue light be out of alignment? My screen is yellow tint. Thanks
Doesn’t sound like alignment, check if all the optics in place, could be dirty or something fell out of its place if your screen has even yellow tint
@@MaxELECTRONICS thanks, I forgot about this and It's looking at me on the shelf lol, will look
Thank you so much, appreciate your efforts!!!!!
Should give you more than "Like, Subscribe & Share"
Thank you very much for sharing max
hi max this is paul i have optoma hd-142x modle projecter no power what type of problme is it can ane has an anwesser
It’s hard to tell without looking at it, if there’s absolutely no power it could be “on board” fuse, or thermal cutout, or switch mode power supply board.
I have an issue with misaligned panels. I cant align them in the settings my projector does not show that option. Anyone know how i can align the panels manually?
Hi bro thanks for your video
I tried to replace green LCD in epson 8350 after that I got double image. I try to lossen the LCD screws and align the image properly but during the LCD cable removable time it's again misaligned. please guide me how to solve this.
You need flex cables extension so you can realign lcd while projector is on. So once you extend the cables, loosen the lcd screws, then use bluetack or whitetack to hold lcd in place amd adjust it, once it’s aligned, use quick set epoxy on the corners of lcd so it’s set in place, once epoxy set, gently tighten the screws, but not too tight.
Thanks for your support, I try to check the extension cable availability...
You have any flex cable jig, please share the image or link
Unfortunately I don’t, I never remove lcds due to convergence problem after removing, even if I need to change output polariser, I always work around the lcd but never remove it
Where can I purchase new output polarizers?
Hi, I found them on AliExpress. There’s some on eBay but they a lot more expensive then AliExpress
@@MaxELECTRONICS Thank you!
@@MaxELECTRONICS They didn't show the polarizers for my particular model (Epson Cinema 3000). Are the Epson polarizers pretty much the same from model to model?
Yes they same, just colour and size is important,
@@MaxELECTRONICS I can't find the epson polarizers anywhere. Bummer
what effect will happen if the tool at 10:53 duration is damaged
I'm stressed that my projector is damaged in the polarized part, there are two that are right on the prism and on the outside and the anti-glare is looking for a replacement that doesn't match so the blue and black colors disappear on the screen..please tell me the solution, thank you
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komen bang
very strange
Excellent, thanks!
awesome, thanks.
thx 🥇
Oh my projector in Epson 5040ub