NEC M300X LCD Projector Repair/Diagnosis
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- čas přidán 8. 09. 2024
- This NEC M300X has a weird problem where it will shut down after some time or right away for no obvious reason. I suspected and confirmed that it's because of the Dynamic Iris assembly. Turns out the nylon gear cracked from the heat. The customer decided against repairing it but left it with me to do what I want. I may see about repairing the gear rather than dropping $100 on a new Iris assembly. What do you want to see me do? Replace the assembly or repair the gear?
DUDE!!!! SO glad you posted this!!!! I just followed step by step and totally repaired my NEC projector! It was the dynamic ratio. I took the motor out and discovered something was impeding its motion. Hit it with some 99% alcohol then with a q-tip, applied some lubricant to the springs and gears. Put it back together and works every time!!
NEC is good brand, I will bought it from scrap market in next time. more videos on main board issues of 3LCD, please.
Man I have the M260X and the iris motor is doing the same thing and most places are sourced out of China for shipping. I don't want to wait that long for a new part lol Great video even 3 years later
Yeah its a pain of a part. The company I used still has them and they ship to you in about a week but if you can get away with gluing it in place somehow, that would also be an option. Thanks again for the kind words!
@@FixitFrank mines definitely the motor specifically. The iris doesn't move freely when the motor is in place. When I pull the motor out is smooth as butter 🧈
That was great, but I need to replace the lens! Any videos to do that? You'd be my new best friend!!!
I havent done one yet but I think I have one of these still. I need to look around. Wjhat's up with your lens?
@@FixitFrank The focus ring got knocked off. I tried to cannibalize another projector. After busting my but to romove it, I found THEY DIDN'T MATCH! ARGH! So the focus isn't focusing past a certain point.
Awesome Video just repaired my M300W!
Thanks Bro, My Projector is working now..
dear what are say about Blank Screen problem of a Projector?
Hey I have a NEC ME301x keeps shutting down. Bulb has been replaced, any advice as to what may be the issue? I am handy so can work with it just not sure what to look for
Depends on what the error LEDs are telling you. Always check the LED flash codes and compare to the owners manual . that should point you in the right direction.
okay... I actually found this projector model out on the street. brought it home and plugged it in and the lights work and it even came on. when it did come on the menu came up and it was toggling through the options with out me even pressing the buttons. it powers on (if I press the button hard enough..) and then abruptly turns off and the "status" indicator light will go between green and blue and yellow. I shook it and nothing is rattling on the inside so I don't want to throw this away - it looks as if it still has some life left to it. I already have a fully-functional projector but its good to have another. From my description, what could you tell me from your expertise? my last resort is to get it serviced however if I can fix it myself, that 'll be better!
You said something about "cleaning" it and that usually resolves most of the issues..
anyway, just need some help from ya. Thanks in advance Frank
These tend to have the iris module fail. There is that little nylon gear that dries out and cracks. Since it is nylon, you cant glue it with normal CA or epoxy. The Iris assemblies are pretty easy to change though. That is what I end up doing on most of these. I ended up with 3 of these MX300s and they all needed the iris assembly changed. The cost was pretty reasonable.
Double check your error codes against the manual. The flashing of the LEDs will be in a specific order that will indicate the problem. Sometimes the lamp timer runs out but since yours starts and immediately stops, I bet its the iris assembly.
Thank you for the video. I have the same issue with an NEC P420X projector. Were you able to repair the gear or did you have to replace the motor/iris assembly?
Hi Tom, I ended up replacing the entire Iris. There is a later video with that in it. Replacing the gear was more hassle than it was worth. The motor is kind of built to only go together. You 'could' replace the gear but I would be skeptical of its longevity.
Great video Frank. If you want to do an Epson 5040UB with an "Internal Projector Error" fault, I'd love to send you mine. Just out of warranty but like-new near mint condition but won't complete startup or strike/light the lamp due to the mysterious issue.
where can i get an auto iris for a NEC NP-P420X took it apart and it is doesnt bounce back like the spring was gone after i took the motor off of it....
I use a company in China called Time Electronics. GYDZ@Timeprojector.com Be sure to include a picture of the iris assembly. You probably had the gear on the little drive motor split. That will cause the whole assembly to jam up. Replacing it with a working assembly is really the only option I know of. The iris assembly is not repairable as they sit.
any idea how to solve the white screen problem?
hard to say. That could be a few things and none of them are easy as far as I know. If you have no image, that could be a mainboard problem. If you have some picture but it is very washed out, that could be optics. Id have to see a picture to have more useful info.
Hey FixitFrank, I have an NEC Projector M260X, I have an issue regarding the status light. My Projector lamp is still working wonderfully at 45% but the status light turned red and blinked 6 times. I can't seem to figure out what is causing this since everything looks normal when I opened up the projector.
Six blinks means lamp error. Sometimes lamps will fail early. Depending on many variables such as ambient air temperature or the amount of times turned on and off. There is a lesser chance that the color wheel is sticking. That will prevent the lamp from starting and give you a lamp error. I would try another lamp first as it's the easiest first step. Does it try to start? As in so you hear the fans spinup and after a few min it's flashing 6 times?
@@FixitFrankHey FixitFrank, You're right it was a lamp error, as soon as I start turning on the projector the lamp flickers a bit and I hear the fan spin up. After sometime the status light flashes 6 times. I'm planning on replacing the lamp but thanks again for your help much appreciate it.
@@shazamrx1358 You are very welcome! Take a look at the lamps arc tube. if it looks darkened or distended, make sure the lamp blower fan is clean. Lack of airflow is the biggest cause of early failures that I see. They will run hotter than normal which wears out the lamp faster.
@@FixitFrank Okay I will check that out, please do more of these projector repair videos, it helps us out on knowing our product and how to fix it thanks again for your help.
Hi Frank. You showed at 17:58 that the blades (wjen motor removed) automaticly bounce back.
Mine runs smoothly, but does not automaticly bounce back when released and stays where I put it. Which spring is used/makes it move back. What is the cause?
PS: mine starts up, shortly switches lamp n for 1-2sec and then clicking / rattleling sound starts and it shuts down and Red LED slowly blinking...
If the motor is still attached, it is preventing the springback. However you probably have a bad Iris gear. That is super common on these and likely the main issue with all of them. Every M300X I have seen has had a bad gear on that iris motor. Its a Nylon gear so gluing it isn't an option. I have considered having metal gears made for replacement but I am not sure if there is a good enough market since these are kind of old and iris assemblies are still available.
You can contact Time Projector for replacement Iris assemblies. Gydz@timeprojectorlamp.com. Just be sure to send a pic of your old iris assembly. That is probably the noise you are hearing when you shake it. The iris shutters hitting each other as it shakes.
Where would I find a new iris assembly? Mine has a cracked gear
I work for the Toronto District School Board. We have several schools with multiple whiteboards that use the NEC NP-M300XS and many of them have the split spur gear on the iris motor shaft. Our main projector vendor wants over $600 to repair them. Personally I believe NEC should cover this repair as it appears to be the ONLY reason these projectors are failing, but it seems unlikely they’ll do this. Were you ever able to source this part?
Hi Karl, That is incredibly frustrating to hear. I did look it up and I think it was around $90 for the assembly. As far as gluing it, I did try. It seems to be made of nylon which doesn't glue very well. Even if it did glue it would probably break again. Replacing it is the best option. $600 for repair is ridiculous in my opinion. I have to check with a few vendors but let me see what I can find. If you have a fleet, then its worth finding a source for parts. It may take me until early next week to get in-touch with everyone but I will get back to you.
FixitFrank Even though I believe NEC should cover the cost of repairing this flaw, I suspect the schools would be willing to pay $90 for the part since I would do the work, which costs them nothing. I look forward to any information you can offer.
I could not agree more. I emailed my contact in Taiwan to see if they can source the iris assembly. There is a guy on ebay with them now for $90 but I think he only has one left.
Hi Karl, I found a source for used but known good iris for a much better price. If you can email me, I will be happy to help get this together for you. Thanks Frank
okay FixitFrank, need some help if you can. Got an NEC M420X.
Had the dynamic iris issue, fixed it once worked for 8months, now had to replace the part (chinese) but since turning back on I'm not getting a lamp housing indicator light (1 red light on off but not rapid blinking).
Put the old part back in and still lamp housing issue, everything seems in order, any idea? or am i gonna have to for out to NEC repair centre :(
Any help buddy would be incredible, thank you!
Hey Calum! From the symptoms, I would open it back up and go over the wires. To be clear you have the status light turning on and off(0.5 sec on and 2.5 sec off?)
I wonder if you have something partially plugged in? Another possibility is a bent/damaged tab on the door that hits the switch(isn't hitting the switch). If its your personal projector, you could safely solder bypass the lamp door. Those small pin-switches tend to break pretty easily if you have that type.
@@FixitFrank hey Frank thanks for the reply, yup all wires seem fine unplugged and re plugged several time to be sure lol its our church projector and would happily have a go at bypassing, I just don't understand the board well enough to know where to solder, any ideas? Is there somewhere I can discuss with you share photos etc if need be?
Appreciate the help Frank, not many would be as helpful nowadays
*edit * yup that's the light sequence flashing
Sure thing. hit me up at sales@weezytech.com Check the lamp door for broken plastic. The tab that hits the door switch is suspect.
Good Afternoon Frank,
I received my Auto Iris today and installed it. The projector powered up and worked great, then the over heating warning came up. All the fans sound like they are working and the filter is clean. Do you have any videos for a repair of that issue.
Thanks,
Hi Tom! Did you have any overheating issues prior to the iris change? If not, I would go over the fans and make sure a wire or something isnt blocking them from spinning. Another idea is to test the tachometer leads on the fans and see if one is not reporting the RPMs. There is a lamp blower fan that is kind of buried and you may not be able to hear it. Check over your wires first(make sure they are plugged into where they should be) and then look to checking the tach leads. The projector isnt running long enough to truly get too hot so I suspect its a fan not reporting or not spinning. That will happen immediately and shut it down in less than a minute of the lamp igniting.
@@FixitFrank Thanks Frank,
I did open it all back up and checked to see if the fans were running. Do you happen to have a video on how to check the RPM's. I'm not quit ready to give up on it yet, but don't want to just replace parts either.
Thanks,
@@tommcelrath9632 czcams.com/video/stIYr2bI2fQ/video.html shows how to test them. I'm glad to hear you don't want to just chuck parts at it. I see that line of thought too much. I get why, but I'd much rather check voltages than throw money at it. elektrotanya.com/nec_np-m300_series.zip/download.html here is the manual for an M350X. It is almost the same as your P420. It should share a lot of the circuit info.
Frankly to be honest it does good tutorial :)),. I Have similiar issue, my mx311 can't light up. just blinking power red button, and led red power.
just check the lamp part is normal. any comment frank?
Hello! Yes, please count the number of red blinks between pauses. Do the fans try and start or is it acting dead aside from the LEDs?
@@FixitFrank It's has been Solved, the issue was the iris shuter mechanical sticky, didn't move freely just clean it & put some oil.
4 More to go, not much nec repair tutorial :(...
@@syahjo2729 glad to hear it!
Hi FixitFrank. Good video, thank you. I hope I can bug you for some guidance. We have a NEC m311w projector that has no power. No lights, nothing. Replaced bulb. Nothing. Is there by chance something on power side like a fuse or safety switch that can get tripped?
Thank you for any help.
Hi! There are a few possible causes. There is a mains fuse. There is also possibly a one shot thermal fuse but since this is very similar to the m300 I think it's probably a mains fuse.
Sometimes they put resettable thermal bimetal sensors. They have a red pin you push on to reset. It would be near or on the lamp area. Once you take the top off the mains fuse should be not too far from the power plug. It's right by the mains power switch.
When you change the fuse(if it's bad) I would recommend checking the mov's or just put your meter in ohms across the power input to see if anything on the front end is shorted. Probably not but it's worth a check.
@@FixitFrank Appreciate the reply and your wisdom sir. Thanks. I took the top case off last night and I dont see a fuse at this point. The power circuit runs underneath everything it seems on this unit so I'll need to do quite a bit of disassemble on it to get to that area. If fuse, I wouldn't think they would bury it in a hard to reach area but again, I'm rookie at this.
Take your time and use your phone to take lots of pictures. Make sure you put the same size screws back into the same placed and you will be ok. Rushing is what causes more problems in my opinion.
The fuse should be right by where the power cord attaches. I think it's visible once you remove the mainboard and back panel.
@@FixitFrank Roger that brother. Thanks again. I'll report back.
@@FixitFrank Hi there. I have an offer for you. I dont need this projector. How about I send it to you so you can make another repair video to help others and the community out? Let me know and I'll box up.
Hi Frank, are you familiar with epsons at all? I have a powerlite pro G5450WU. Bottom left corner of the image has always been out of focus. Its uniform across the entire image (not isolated to one RGB LCD), I wonder if one of the lenses/mirrors in the final shifted when it was shipped to me years ago. Do you know if there adjustable mirrors/lenses that could cause this symptom if out of alignment? Thanks.
This is an interesting read, looks like its almost impossible to calibrate though since everything would have to come apart, then be reassembled to test it: www.projectorjunkies.com/to-%CE%B3%CE%B5%CE%BD%CE%B9%CE%BA%CF%8C-%CF%80%CF%81%CF%8C%CE%B2%CE%BB%CE%B7%CE%BC%CE%B1-focus-%CF%84%CF%89%CE%BD-lcd-epson-2/
I am familiar with them enough to stay away if I can. I find LCD really difficult to work on (the optics side). Getting things re-aligned is possible but you need the tools and jigs that arent available unless you are an Epson rep. Epson's are great until they break out of warranty in my opinion.
NEC M300X projector 9 times status red light blinking, i don'"t know what's the problem
Hi Jose, That usually means an iris error. If you have the same model, then most likely the small drive gear for the iris motor has split. It is replaceable but they can be difficult to find. If you need a source, I can provide a seller in China who has helped me in the past. I think the email is listed in the description.
Saya bisa servis di mana NEC M300X projektor
I got the same projector. When i connect the power cable the power button flashed red once. Does anyone have an idea what that means. I can't find anything in the user manual or on the internet. Most people say it flashed 6 times but mine is only flashing 1x.
Usually its the status light that flashes 6 times. That can indicate a lamp issue. The power LED flashing once seems to indicate 'power saving' mode in standby. Try pressing the AV-Mute button on the remote as well as move the door back and forth to make sure the mute switch is off. I believe you have to use the remote to do this. Then to disable it, go to Setup menu and options 2, then you will see 'power saving mode' and can disable it.
@@FixitFrank Thanks for the quick response. I forgot to mention the projector won't even turn on... Do I have to do the remote thing on the beamer when it is not powered? I already checked the components on the power supply if there is any visual damage but didn't find anything.
I am not sure honestly. The manual seems to indicate that many things are disabled when that feature is turned on. I would give it a shot before going further.
It may also be worth connecting the power supply, bypassing the lamp switch and lens switch and measuring the voltage where the power supply feeds into the mainboard.
Does the LED flash once continuously or just that one time when you first apply power?
FixitFrank just ohne time when connecting the power cable 🤷🏼♂️
@@rollercoasterplay Huh. That makes me wonder if its something else then. Id still try the button to be safe but its definitely worth checking power supply voltages now. Connect everything back up and bypass the interlocks. Then carefully measure each pin from the power supply with the negative lead on a ground point. you will measure a mix of voltages. I think you will see 0, 3.3(roughtly) 5, 12 or 16v. Give or take half a volt. If you can let me know what you see I can help determine if you have something else going on.
Have you replaced the iris assebly?
Hello, I did replace it. I hope to repair an iris at some point but the gear that fails is very difficult to source.
@@FixitFrank I have an old NEC M260X projector, the motherboard of which have problem. If the iris of 260x and 300 x are same, then I can provide you that.
Nec projector 9 time red light blinking
What is the model #? मॉडल नंबर क्या है
What Model Pawan? could be the dynamic iris which might be able to be fixed before replacing the part :)
Correct! I am guessing he means this model but if I assume so, it'll be something else, as my luck would be...
Replace the Dynamic Iris Assembly
Im leaning that way. I think I may actually do both. Then people can know a short term fix and then perform the long term fix once they get the iris. Pricey pieces though. I was surprised. I'll order a new one tonight and do the video once it shows up.
If you were going to fix that cracked gear, would you just use some glue or did you have something else in mind?
@@karlhildon8477 I was considering trying to fool the projector and just remove the iris. They are helpful for contrast but you can get away with out them.
helllo Polska
7:27 Fart?
sadly no. it's the screwdriver landing that I tossed. It would be way more of a trumpet than a little rumble like that.
@@FixitFrank XD
Hi Frank. I hope you can help. I have the NEC NP-M311WG with the same Problem in this Video: czcams.com/video/n-5DICyXM6M/video.html. A have a new Lamp. Any idea where the problem could be? Thx.
That is a tough one. There are a few possible causes. Your model does not have an auto iris so it's not that. My initial checks would be via the LAN port. I would connect that up to a network and see if there are any errors recorded. Otherwise, I'd start by checking fans and making sure the lamp is using an Ushio brand bulb inside.
@@FixitFrank Thank you Frank. I connected it via LAN but no recordings. Fans are ok. Lamp new Ushio NSHA230Q. Power supply capacitors exchanged. But voltages on the POPW do not fit. I miss 15 and 17.5V. The others are lower than the default.