NEC Projector Dynamic Contrast Error Fix
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- čas přidán 8. 09. 2024
- This is possibly the most boring video I've ever made because it's instructional and applies to very few devices. But the Dynamic Contrast error, that NEC projectors are prone to, is a pain in the arse so hopefully it's worth it. The error prevents the projector from starting up at all and is really fiddly to fix, but can be done (and it's free). The alternative is getting the projector repaired by an official service centre, which is probably going to be more expensive than buying a new projector in many cases.
The projector featured in this video is the M230X, but should also apply to other projectors that use a similar iris assembly.
Big respect to Philip Tan for the blog post linked below, which is an excellent written guide. This video guide is intended as a video complement, as I needed to dig deeper than the detail described in the blog post in order to fix my problem.
dynamiccontrast...
Music:
Track 1: 'Speed Trip' (Extended Mix) by Me
Track 2: 'A Place Within Your Mind' by Me
Track 3: 'Elina' by Cynanid
Track 4: 'Nu-Life' by biorhyhm
More royalty-free music at / misterduffy
Disclaimer: you follow this guide at your own risk. I cannot be held responsible for any injury to yourself, or damage to equipment. Use common sense and you'll be fine: don't touch live electronics, don't touch hot things, don't look directly into bright lights, don't touch fragile stuff, etc.
Thank you so much. My wife bought this projector used, for her class. She is a teacher in a small, not too rich school here in northern Finland. The seller apparently scammed us because the projector was not working and he did not respond us after the transaction.
The projector had this exact same issue, and with the help of your precise, well explained guide I actually got it to work. My wife is so happy and the huge disappointment turned to joy. And the students will benefit too! I honestly can not praise your effort enough. Thank you so much.
What an amazing story, thank you for sharing! I used to be a teacher so I understand the situation. I'm very happy that it worked out. 🙂
Thanks heaps from Wollongong Australia! Mine was a P350W, but it did the exact same problem. Tried to turn on, made the ticking noise for about 5 seconds, shuts the lamp down, then the Status LED flashes 9 times, pauses & repeats, etc. Didn't take the Dynamic Contrast assembly apart, just removed it & spayed it liberally with Contact Cleaner & Lubricant (from Jaycar). Before spraying, the little metal shutters were hard to manually open and close. After spraying, very easy to open and close. Worked first time after reassembling. Just think of all the landfill this one video has saved on NEC projectors.
We should all buy this guy a beer or something because I too was able to fix my home projector (M300X)! Gears had resistance and were clicking loudly when I got into the iris mechanism- a little grease seemed to do the trick! Thanks so much for uploading this video! Cheers!
That's brilliant, I'm glad it worked. I only provide the clues - you did the hard work!
Thank you for this guide! I found one of these projectors at a junk shop for ¥1,000 and was able to successfully repair it. It’s working great now!
Helped me repair 8 school beamers thanks! This man is the GOAT
That's amazing! My first projector repair was an Epson one in a school.
wooooowwww!!!! Simply amazing!!!!!! Thanks a lot for share this information. My projector was stopped for a few months. My case was the same issue, i opened, followed the instructions, applied a small jet of the classic wb40... and all set!!!! Thanks dude, you save my life here. BIG RESPECT!!!!!!!
Boring??? Absolutely not! This is a fantastic video. Very detailed and methodical. Looks to me like there's a bit of "shellac" build-up on the various capstans --I'm guessing the lubricant deteriorated b/c of elevated temperatures in that area. Perhaps a dental pick would be a better choice for working with those springs. Thank-You for an excellent presentation!!!!
I've never fixed anything like this before, but your video is so clear and concise that even an amateur like myself was able to follow along with knowledge and confidence. My projector is now up and running again for my whole family to enjoy and I cannot thank you enough dude. It's my kid's cartoons and films which they have really been missing and I can't wait to see their faces in the morning. Thank you so much!! If you're ever in Portsmouth, several pints will be on me. Huge thanks for this tutorial/fix. It's so well explained and "over-engineered" is a bloody understatement, haha. It's actually ridiculously so. Thank you so much dude.
This is so awesome, thank you for letting me know. Very glad to hear that you had success. 🙂
Thanks from Italy.
The projector had this exact same issue.
Perfect instruction, we have solved the problem on M420X only with a little bit of grease
So glad I found your video! I have 3 nec m300w with the same issue. The only service who know what to do - 500 km from me and asking $100 usd per piece for "motor replacement". Will try another way. Thanks so much, and gods bless you)
Best of luck, and thank you! 🙂
Brilliant video - I fixed my projector and it’s working again. When I got down to the complicated lens part I didn’t dismantle it. I simply undid the two little screws half a turn and then moved the movement a bit until it felt it was moving freely. Re-assembled it and everything now working!
This is amazing! I'm glad it worked. They're good, solid projectors and are worth making the effort on. 👍
Aqui é do Brasil.... Meus agradecimentos pelo vídeo. Estava com medo e ao assistir seu vídeo tive coragem de fazer o procedimento. Usei silicone como lubrificante e deu tudo certo. Gratidão!!!! 2024
Vielen Dank für das Video. Jetzt funktioniert mein M260W wieder einwandfrei.
Worked for me.... After 3 hours of work, my projector is working again. The big struggle for me : taking off the cables (without breaking them). Too hard that was. I was using a tweezer but even with that, it wasn't easy. I don't understand why it looks so easier for you to do it.
Thanks!
Maybe because I wasn't worried about breaking them. You could call that confidence or a lack of caution, but I guess that's down to the person doing the repair. I'm glad you did it successfully though!
Like many other commentators here - this helped me fix my projector (M350XS) and the symptoms were the same. The dismantling was a little different but not a problem. Thanks so much for sharing this video.
This is so great, I'm really glad it helped you.
@@BrassicGamer I used silicone spray to lubricate the mechanism for 2 reasons - (i) it meant I did not need to dismantle the mechanism and (ii) the projector is installed upside down so I think the silicone will stick to the surfaces better and not run into any other part unlike oil.
Thanks so much from france, your video saved us from bringing the projector at some reparation shop. It was explained so well we succeeded to fix it and we were so happy to see it work!! Merci
Amazing! I'm very happy to hear this and thank you for telling me. De rien!
Lot of help. NEC M260SX recovered to life. Thank You.
This video is simply amazing!!!
I managed to repair my projector at home. The issue was the sensor for the iris when it is open!
Thank you so much Brassic Gamer
Very happy to hear this. Enjoy!
Hey ! Thank you so much for your video and the time you spent to do it. Thanks to you I also managed to fixe mine I just found in a garbage. It works now very well.
That's amazing, thanks for letting me know!
Mine works again. Took me about a hour and its working perfect now. Thank you so much for this video.
That's great news, I'm glad it helped!
This has just really helped me!! Thank you for taking the time to film this!
Thank you. So useful. I thought was lamp lifetime but checking the manual, I got with this problem. Great video. It works for me. Thanks!!!
Thanks for this , worked perfectly , didn't have to take the iris mechanism apart , just sprayed with gear oil and dried it off , you're a legend !!
Well, damn - I guess I could have done that in the first place. ;)
Thank you for the video, I had my parent’s projector repaired in no time
Very detailed video, nice. I have collected a few of these projectors (around 8 or so) all have this issue, except on every single one the motor gear has a hairline crack in it making it click against the next gear, tried a selection of different glueing techniques but none seem to have been successful so far, will next try filing the motor shaft ever so slightly and heat mounting the gear so it isn't forced apart as much. (Already cleaned and lubed the mechanism with wd40)
Just got the same problem with the same kind of projector. I'll try your technique, thanks a lot for that video !
Best of luck. Still using mine to watch movies with the kids. Worth the fix!
Thanks! It's working again now. I had this exact problem and fixed in an hour! 🙂
Thank you so much, your video was so clear. I was able to fix my P420x 😊
YOU ARE AMAZING !!! I fix my projector with your good explanations ! Thanks a lot !
Hey, you fixed it 😊 But I'm glad the video helped.
My went into 9 flashing red watched this and with in the hour I was back up and running thanks so much nearly ordered the part lol
Thank you. A very well made guide with clear visuals excellent pace and helpful tips on potential pitfalls along the way.
Thank you friend. Your video walked me fantastically through the service of my NEC P420. Of course, the repair was successful. Greetings to you
Fantastic news, thanks for letting me know.
You sir, saved my two projectors. Thanks a million!
This is amazing news. Obviously I hoped this would be useful, but it's really nice to hear that it is 🙂
Thank you very much for this guide, cleaning the iris sensor was what fixed my colleagues M230X.
Excellent! I'm glad it worked.
Gracias señor por este vídeo me sirvió muchísimo pude arreglar mi proyector
Thanks so much man. It worked. You saved me a lot of running around, and a projector. Cheers to you
That's awesome, I'm glad you were able to follow the guide as it's fiddly!
Legend!! This is a public service :)
Thank you for this in-depth video. Its great to finally understand what is going on with this issue! Keen to try disabling the dynamic contrast by removing the linkage ;)
Thanks, Martin. Really happy that so many people are benefiting from this guide.
Fixed my problem. Thanks mate!
You're most welcome - I'm glad it worked!
Mine moves freely when the motor is out. The motor itself moves freely also. But when the motor is in about three spots in the full sweep of the iris, the gears seem to bind. I've inspected every tooth in the gear, but I can't seem to find which would cause it to bind up.
After my first attempt at repairing mine, I considered removing the linkage between the clutch gear and the aperture and then manually setting the iris to open. The small gear would then move freely with the motor, triggering the optical sensor, but the iris would stay open. It could be worth removing it anyway to see what effect it has.
Same bro
having the same issue here. moves fluidly without the motor but once it goes in the gear underneath the motor keeps catching even after lubrication and there doesnt appear to be any busted teeth - very frustrating
Hey all, I have the same issue and found a video from FixItFrank with this problem detailed. It's likely that the gear connected to the motor is cracked. We might all need to just buy another iris assembly if we can't find the motor as a replacement part or somehow repair the drive gear.
@@BrassicGamer replied to another comment but I had the same problem and it looks like the gear on my motor is cracked. Could be the same problem.
THANK YOU SOOOO MUCH!!!
A really clear and helpful video - thanks : )
Saludos desde México ✌️
My nec m230 don't display any info, even after pressing menu button. Someone told me that the reason is died dmd chip, but in this model i cant find it inside, may be someone knows where is it?
Thanks i solved my problem
Thanks very much useful!
I tried this but it didn’t fix my projector :(
Thanks mate
just got the 260 today from a car boot,said the lamp had gone, came on for a bit, the, yes got the dreaded clicking noise
Oh no! Well, hopefully the bulb is fine because that's not a cheap fix. Best of luck getting it working.
@@BrassicGamer bulb is fine, had a good picture,think its one of them built in obsolescent things
How eliminate this dynamic contrast? Its possible?
Yes, if the motor works okay and you set the reflectors open, you can remove the plastic piece that links the two together. The optical sensor must provide the 'on' 'off' signal.
I did this, and it worked! Unfortunately the lamp exploded about 10 minutes later, any idea if there's something I could have done wrong to cause this or was it just bad timing?
Hard to say, as I've not experienced that myself. I doubt it was related to overheating because, even if the fan was disconnected, it should have cut out if it got too hot. And I would think that if the thermistor was faulty or disconnected then the projector wouldn't function. I see why you would rather know why - replacing the bulb only for it to explode again would not be a desirable outcome. I'm glad the repair worked, though.
@@BrassicGamer I've replaced the lamp and it's been running for a few hours with no issues. If it wasn't just unlucky timing my best guess as to how I could have caused it is that overlubrication of the iris mechanism may have lead to a spot of oil being flicked off onto the lamp once it warmed up and became less viscous. I don't think this is particularly likely but it's the best I can come up with. I did clean a bit of the lubricant off it before installing the new lamp, so who knows... The previous lamp was 10 years old so it may well just have been a coincidence.
I am having the problem is lamp is not working
You are the best
Boss I’m not giving order it’s request please update about below comments
Can we bypass iris ?
That's a good question and it's something I considered. But the answer is quite technical, so apologies in advance for the menu words.
Theoretically you could disconnect part of the link between the tiny motor and the metal 'wings' that form the iris. The wings could then be moved manually into the open position permanently, and the motor would turn freely. We know that there is a sensor detecting movement near the motor, so that part needs to stay connected. The only question is whether there is also a sensor detecting the amount of light being let through the iris. If so, the iris cannot be bypassed.
@@BrassicGamer the bypass worked . :) but now the picture have yellow lines on all screen:( . And i have other NEC which has steady blinking red power light not status its power button. Can you help whats thats mean ?
@@ijazahmed618 are the lines vertical or horizontal? Usually that's related to the LCD panels, or one of them. What I would do in that situation is disconnected the LCD ribbon cables and then connect only one LCD at a time, to work out which one is causing the problem. If the lines are present on all, then it's a processing error (electronics).
As for the red light, I would find the service manual and start there.
@@BrassicGamer they are vertical. I will try that . Thanks again .
@@BrassicGamer it was blue lcd screen. I unplugged the looks ok with out blue lolz
Can I send this in to you? I’ll pay