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POSSIBLE JVC HD PINK LINE SOLUTION !!!!(in some cases)

post #1 of 28
Thread Starter 
Completely by accident i left my pj running all night with the heating in the room fairly high ! (+- 28 degrees celsius inside). The weird thing is i noticed the pink line, wich had been there for several months already, DISSAPEARED ! about two weeks later it came back very slightly, so i decided to take a gambit, and used a blowdryer on the hottest setting and on low 'blowing' power, blowing gently hot air in the airintake, and oh yes, u could almost see the pink line dissapearing... since then it has never come back again....

I guess i'm suggesting u turn up the heating in your room and let it run, please let me know if it works for u guys also !

( i did post about my problems earlier, but it seams these threads have been removed , it is important for u guys to know that i've had this problem for soo long i eventually gave up on it and learnt to live with it.., but this works , i now leave the heating one constantly though, seems like cold and cool environments seem to cause this ??? )


side note :

when i came in in the morning the pj was blowing sooo hard to cool itself down i was getting worried, but seems this is normal, i have no idea if is this maximum cooling state was helping get rid of the pink line, but u have to know i all happened in high lamp mode. Really hope this helps all of who have the same problem !

grtz
post #2 of 28
Interesting.... I just posted about if this problem cropping up in new JVC projectors, what model do you have and how many hours when this problem occurred?
post #3 of 28
Thread Starter 
i have a hd 750, older model without the frame interpolation processor.

i'm on my 3rd lamp right now. The first lamp ran for 2800 hours, the second one 3100 hours and now i'm at 300 hours on the third lamp. (im projecting on a 100 inc screen in a 3 m by 4 m room,projector is about 2,7 m from screen, so i guess i never had the problem of low lumens on screen, even at around 3000 hours light is plenty but i'm just afraid the lamp would blow if i leave it too long in)The problem first occured after changing the first lamp. This is when i went back to JVC Brussels for about 3 weeks. When i got it back, and i switched it on, the problem was worse then when i sent it in... According to them it was because probably it happened when shipping it back... so back it went, when i got it back the second time after 4 weeks, it was fixed... for about 4 weeks, when the line occured on the other side of the screen.... After this my warranty expired and they didn't want to do free repairs anymore... Suddenly they said it was best to change the optical block for about 2000 euro's.. This is what made me seriously angry because i thought they did this during the warranty, turned out all they did was reallign mirrors inside the original optical block., wich now seem utter BS since apparently a bit of hot air solves the problem..... this is pretty much were i gave up and started thinking of buying another model. In the mean i kept using it, when i found out the hot air seems to fix it....

anyway, hope it's helps some of the unlucky customers out, i still love the image, i just h8 jvc customer sevice.
post #4 of 28
Well at least you have had a lot of hours use from your projector before the problem occurred. I'm dubious about pumping hot air into the air intake that will make the projector even hotter, can't be good for it but I believe you that it worked for you.

If you had the problem before your warranty expired JVC should still honor the fix if they didn't fix it the first time. At least you have a fully functional projector even if JVC didn't do the right thing by you. Please post back if the line comes back after time.
post #5 of 28
I've noticed something similar--not as dramatic as you described. I've had the pink band for about 1 year now

My RS20 sat idle for 3 weeks as we were out of town. Upon return and powering up--- the projector exibited a larger than usual pink band on the left edge. With considerable use the band has shrunk back to its original size. Maybe heating does help???
post #6 of 28
I just had a line crop up on the side of my screen as well.

It's not pink really, more of a red/faded line but I'm guessing it's the same thing.

So blowing hot air gets rid of this?

I'm pretty disappointed with this as I had a Sony projector for years and it didn't have a single issue and I guess this is a common problem on the JVC projectors.
post #7 of 28
Thread Starter 
yess blowing hot air in it pretty much solves it whitin minutes, but i dont wanna be putting people up to this, as deandob said, i'm not sure if this is good for other components in the unit, it solves the pink line but does it cause harm to other parts ? i have no clue, i'm not a technician.

cranking the heating up and see if your pink line diminishes would be a safe start i think, if u notice an improvement u might wanna try out the blowdryer, i just did it because i felt i had nothing to loose, cause i was thinking of buying somehting else, i'm pretty happy now again.

I'm very surprised to find out even the new models still have the same problem though, that just plain suck dballs, they are too expensive units to have such recurring problems, with all the hassle that comes with it for the endcustomer, maybe i should call JVC and explain my findings ? If more people have good results i just might do that, maybe some of their chips are just too sensitive to cold environments and they have been looking in the wrong direction to solve the problem for future models...
post #8 of 28
Quote:
Originally Posted by denkiedenk View Post

...
I'm very surprised to find out even the new models still have the same problem though, that just plain suck dballs, they are too expensive units to have such recurring problems...

I've been following the RS40/X3 owners thread since it started and don't recall any reports of this problem. Did I miss something? What new models are you referring to?
post #9 of 28
Thread Starter 
Quote:
Originally Posted by Dan P. View Post

I've been following the RS40/X3 owners thread since it started and don't recall any reports of this problem. Did I miss something? What new models are you referring to?

not sure Dan, but deandob posted a bit higher about the problem popping up in new jvc models...

deandob might want to elaborate ?
post #10 of 28
The thread I started was to see if this problem still exists in the newer projectors, as I don't want to purchase a new JVC and have the same problem occur, especially if it takes 1000+ hours and the projector is just out of warranty. To be clear I'm not saying the new JVC projectors also have this problem, I want to know if the problem is now fixed by asking forum members with newer JVC projectors if they are experiencing similar problems. So far no one has responded to my post (which in itself isn't conclusive proof that the problem is now fixed, but it does give a level of confidence).
post #11 of 28
Quote:
Originally Posted by denkiedenk View Post

not sure Dan, but deandob posted a bit higher about the problem popping up in new jvc models...
deandob might want to elaborate ?
Ok, I see you misread that post. I know that jvc used a new "wire grid" technology to increase contrast and make the image sharper in the new models. i think that started with the rs40. I would hope that also solved the pink line problem.
post #12 of 28
Wire grid polarizers have been in use since the HD750/RS20 days, about a year ago an 'improved' version was introduced.

BTW having to replace the entire optical block for this issue is money down the drain....surely someone out there must have the expertise to pinpoint and repair the issue, or is the crux realigning the components and the need for a specialized 'Jig'

China must have an answer?
Edited by Highjinx - 11/13/12 at 6:26pm
post #13 of 28
Thread Starter 
Highjinx, i can bring my pj to jvc brussels and they will reallign it, but they are asking 500 euro's for it. Knowing that they already did this twice and it came back immediately or withing a month, i'm a bit reluctant to do this allthoug i have been been thinking about it. They ask 2000 bucks for a new optical block, wich mean u'd have a new pj alltogheter for 2000 bucks, where i'm i gonna find the same qualtiy for this money, nowhere. My problem is i already paid 7 grand for it new, and for 9 grand i coulda had the 950. Just on principle i cannot do it, i feel they had to do this under warranty, i think i'll be saving up for a nice runco or sim2 , or i just might give Curt Palme a call for a nice liquid coupled 9 inch pj at under 5 grand...
post #14 of 28
So the hot air thing... after doing this, does the line come back or is it gone for good, or at least for a while?
post #15 of 28
Thread Starter 
been about 3 weeks ago since i did the blowdryer thing and nothing yet, after about 4 hours of daily use, in weekends even more. A heated room diminishes it, but it will come back (on my unit at least), only after the blowdryer it stayed away for me... Just cranck up your heating first to see if there is an improvement before u do the blowdryer thing, at least then u know it's temperature related... If this is true for everyone then JVC have been fooling all of is, realligning mirrors my a**...
post #16 of 28
I tried blowing hot air into the projector and there was absolutely no change.

I tried blowing it in the front vent and the side vent and saw nothing change at all.
post #17 of 28
Quote:
Originally Posted by denkiedenk View Post

Highjinx, i can bring my pj to jvc brussels and they will reallign it, but they are asking 500 euro's for it. Knowing that they already did this twice and it came back immediately or withing a month, i'm a bit reluctant to do this allthoug i have been been thinking about it. They ask 2000 bucks for a new optical block, wich mean u'd have a new pj alltogheter for 2000 bucks, where i'm i gonna find the same qualtiy for this money, nowhere. My problem is i already paid 7 grand for it new, and for 9 grand i coulda had the 950. Just on principle i cannot do it, i feel they had to do this under warranty, i think i'll be saving up for a nice runco or sim2 , or i just might give Curt Palme a call for a nice liquid coupled 9 inch pj at under 5 grand...

It's dissapointing that the entire optical block is replaced, as the issue seems to be the adhesive holding the polarizers stops doing it's job(IMO)....I'm wondering if the extra heat you are forcing in is in someway expanding the suspect polarizer back into it's slot?
post #18 of 28
I'm noticing alot of used JVC projectors up for sale in the classifieds and out on the net. Is it due to this problem? If so, what are the models to stay from? I always thought JVC was the projector to have, but now I'm not so sure.

BigAve
post #19 of 28
Regarding the hot air fix, there are similar stories for people fixing xbox 360s with the 'Red ring of death' or the PS3's 'Yellow light of death'. Most likely the heat is warming up the solder on a circuit board in the unit and reconnecting a part of the board. A slightly more precise method might be to open the case and run a heat gun over the circuitry and leave to cool.
Of course, I could be completely wrong and would only recommend that for daring folk whose warranty has expired and have spare cash for a new projector in the worst case scenario biggrin.gif
post #20 of 28
Quote:
Originally Posted by danieledmunds View Post

Regarding the hot air fix, there are similar stories for people fixing xbox 360s with the 'Red ring of death' or the PS3's 'Yellow light of death'. Most likely the heat is warming up the solder on a circuit board in the unit and reconnecting a part of the board. A slightly more precise method might be to open the case and run a heat gun over the circuitry and leave to cool.
Of course, I could be completely wrong and would only recommend that for daring folk whose warranty has expired and have spare cash for a new projector in the worst case scenario biggrin.gif

I don't know about the fix, but a blow dryer on high, blowing through the vent of a projector is not going to come close to melting solder. The melting point of solder varies from 360 degrees to 460 degrees, depending on type.
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post #21 of 28
There is an authorized JVC repairer here in Australia who say they can fix the issue for around $700. I'm not sure what they do, but for that price it is obviously not replace the optical bloc.

http://www.avsforum.com/t/1346620/rs20-pink-band#post_22387595

I'm going to try the blowdrier on mine tonight.
post #22 of 28
Steve, is this JVP in Marrickville? If the price is $700 its worth considering. I'll also give the blowdrier a try (and its been a hot day in Brisbane today.....)
post #23 of 28
Thread Starter 
Oow too bad it's not working for everyone, but people like i said many times before, firstly crank up the heating to the max and let your pj run for at least a good 8 hours, if there is no noticeable improvement then there is absolutely no reason to do the blowdryer thing. i only blew into the front airintake, i wasn't even aware of another intake?

I blew hot air in it for a good 15 min, 5 min longer untill after it was gone.

It seems all models built before the hd750/rs20 are succeptible to this problem, and since the rs40 and up it seems no one has reported this problem anymore, so things like rs40 , 50,60 and newer should be fine to buy used, because of updated grid polarizers. Some say the lastly built rs20 models also have updated polarizers, but be sure to crossreference the serialnumber with jvc before u buy. That being said, if i could pick up an rs 20 with pink line for under a grand i would still contemplate it for a secondary (basement) system actually, it would still be infinitely better then for instance the epsons. And masking it into an effective 960p projector really doesnt make a difference ( i know in theory u loose some resolution but this is unnoticeable , at least on my 110 inch screen. I was sending out a 960 p signal anyway, i only removed the masks after the whole night of running hot to check if the pink line had grown, but to my amazement it was almost gone by then...

When jvc is offering a fix at 700 bucks (about 500 euro's in belgium) all they do is open the optical block and do a fix, something like reallingnin mirrors according to the belgian rep, but i don't know if this is accurate because i don't really value her opinion, seems her biggest job is to calm down unsatisfied customers and they never let me talk to one of the technicians who actually do the repair, even after asking repeatedly. There is absolutey no guarante that it will stay away, and in my case i'm sure it would be 700 bucks down the drain, as they performed this fix twice on my unit without succes, i'm inclined to tell u to save those 700 big ones.
post #24 of 28
Yeah I tried it in the front, and I tried it on the side (which I believe is the exit area) but nothing changed.

Oh well, it was worth a shot smile.gif
post #25 of 28
Quote:
Originally Posted by deandob View Post

Steve, is this JVP in Marrickville? If the price is $700 its worth considering. I'll also give the blowdrier a try (and its been a hot day in Brisbane today.....)

Yep, that's them. I've not talked to them though, but they did a good job fixing my RS1.
post #26 of 28
The optical block can be disassembled, the issue I'm gussing is the adhesive holding the polariser/s coming unstuck, this was an issue with the Epsons' as well iirc.

http://www.cine4home.de/tests/projektoren/JVC-HD350-750/IMG_3337.jpg

http://www.cine4home.de/tests/projektoren/JVC-HD350-750/IMG_3346.jpg



http://www.cine4home.de/news/JVCHD750/HD750Preview.htm


Who's willing to give it a go.........prerequsite.....a nice clean room......
post #27 of 28
I tried the hairdryer and can't say it did anything. Well, it did put the projector into shutdown mode because of overheating, but apart from that nada.
post #28 of 28
Thread Starter 
Aaah man too bad, i wish i would've helped out some more people.... my unit is still cured....
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