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

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

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.

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...

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

deandob might want to elaborate ?

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...

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**...

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.

Aaah man too bad, i wish i would've helped out some more people.... my unit is still cured....