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==>>The Official JVC - DILA - Z/Gx86 Owners Thread<<== - Page 108

post #3211 of 3765
I have had my JVC 61" G787 for only a week and don't know what everyone is complaining about the black levels. I used my dvd essentials just like I have for my Samsung and for my Dell HD set and it looks stunning. Sometimes I think people just like to complain.

This set has the best HD picture I've seen for the money..

ON a side note my friend just got a Panny a900 something projector. Really impressive and so clean.
post #3212 of 3765
Quote:
Originally Posted by MoPro View Post

I would try connecting just the S-Video from the DVD player to the JVC, and check to see if you still see the problem, and if you do, then I would connect the S-Video to your 27" tube set, and if you again see the problem, then I would suspect the DVD, or the player.

MoPro,

Thanks for your suggestion. I will try both of these things this evening. I won't be surprised if it turns out to be the DVD player. I'm almost hoping it is, so I'll have a reason (excuse?) to get a new HDMI up-converting player!

Regards,
Eric
post #3213 of 3765
Quote:
Originally Posted by Kid Red View Post

Usually green blacks usually indicates a faradouja chip in the DVD that produces that green cast in blacks phenomenon (or at least the most popular cause). Do you have a stand alone DVD player you can test with?

Kid Red,

It's not so much a green cast in the black; it's more like green spots or blobs. I will dig out my older DVD player and see what results that produces. Thanks!

Regards,
Eric
post #3214 of 3765
Quote:
Originally Posted by hi-rez View Post

I have a 52g787 and my smudges were caused by small dust/particulates on the lens. You can move the front screen a little and see if the smudges move or not - if they don't there is a good chance that's what it is!


I have a similar problem. But, the smudges only appear once in a while. Always in the same place. Could it be a humidity or other environmental issue. Its strange. Everytime I get ready to call JVC and complain the smudges disappear on there own.
post #3215 of 3765
Quote:
Originally Posted by dantethedog View Post

I have a similar problem. But, the smudges only appear once in a while. Always in the same place. Could it be a humidity or other environmental issue. Its strange. Everytime I get ready to call JVC and complain the smudges disappear on there own.


mine dont seem to be there all the time,but i think it depends on the color of what is onscreen at the time, a darker color -even just slightly -will cover them, but if its a white or light blue like a sky it shows up
post #3216 of 3765
Quote:
Originally Posted by guitarman View Post

I ran some tests on my new JVC 56G786 display model that has 2300 hours on the bulb. I used Colorfacts and the Accupel HDG-3000 reference generator to perform the tests.

First I ran several contrast ratio tests to find which and what a preset does for on/off contrast. Only Theater mode produces high contrast it came in at near 1500.1 see picture. All the other including Dynamic were just shy of 1000.1.

http://www.cigarbest.com/sales/JVCDLIA1.jpg

Next up was to calibrate the grayscale. I could only find RGB-drive but was able to flatline a nice D65k with just RGB-drive. Since I had no low end RGB control I kept running full grayscale checks with the Accupel generator. The Accupel will run automated tests very quickly which made it easy. Final result was an excellent D65k flatlined grayscale with a gamma near 2.2.

Only JVC checked option was Color MGT. Dynamic gamma ALS all were unsued, plus Theater Pro.

http://www.cigarbest.com/sales/JVCDLIA2.jpg

Here's what the Grays looked like.
http://www.cigarbest.com/sales/JVCDLIA3.jpg

My original service RGB numbers are
R-drive 125
G-drive 128
B-drive 122

D65k tuned numbers are
R-drive 121
G-drive 095
B-drive 095

I know you're asking how was the OTB grayscale. I saved it in PDF form but I have trouble linking those here. Anyway Red and Blue fell 10% short of Dy65k evenly aross each shade of gray. Green was .05% high over D65k all across the shades of gray.

Here's the catch at stock even though not reference tuned the JVC looks excellent color wise and has is own unique style. It produces 1500.1 contrast at stock. When you tune down to D65k the contrast goes down under close to 1000.1

It's your option if you prefer stock or tuned. Maybe my numbers with work for some. What I see with tuned is a image that looks very much like my tuned Toshiba 57HX93. A darker image approaching CRT type look. Oh black level was nice and low on my 2300hrs bulb 0.021ftl which is 1/3 lower the the tested new 1080p machine in HC/iris mode. Contast was just under 1500.1 while the new 1080p machine came in at 1575.1

Hope owners enjoyed my findings.

Do I prefer tuned or stock the jury's not out. I switched back to stock last night and have to say I liked the extra contrast and colors looked interesting also. my my

Thanks guitarman, were there any other settings you adjusted or just RGB drives? A poster around here named "Videobruce" may have some more info on the cuts, he is not hard to find .
post #3217 of 3765
Quote:
Originally Posted by darthrsg View Post

Thanks guitarman, were there any other settings you adjusted or just RGB drives? A poster around here nmaed "Videobruce" may have some more info on the cuts, he is not hard to find .

Sorry for the elementary question...but how the heck do we change RGB values on the tv? I didn't see the option in the menu.
post #3218 of 3765
Quote:
Originally Posted by Stangs55 View Post

Sorry for the elementary question...but how the heck do we change RGB values on the tv? I didn't see the option in the menu.

http://www.avsforum.com/avs-vb/showthread.php?t=598154

the above link has the service menu pages, it will tell you how to get into the service menu and make the changes, just remember to write down your original values before you change anything.
off the top of my head:
press sleep timer then video adjust and display at the same time

this will give you 3 options, one of them is "adjust" select that

navigate to the "SO" labeled settings

mute saves the changes
post #3219 of 3765
Quote:
Originally Posted by darthrsg View Post

http://www.avsforum.com/avs-vb/showthread.php?t=598154

the above link has the service menu pages, it will tell you how to get into the service menu and make the changes, just remember to write down your original values before you change anything.
off the top of my head:
press sleep timer then video adjust and display at the same time

this will give you 3 options, one of them is "adjust" select that

navigate to the "SO" labeled settings

mute saves the changes

Wonderful. Thanks!

One more question though...what should the rest of my setting be at? I changed my RGB to the new settings but didn't really see much of a difference. I'm currently in "Standard" mode with everything set at default. Is this where I should be?

Thanks.
post #3220 of 3765
Quote:
Originally Posted by Stangs55 View Post

Wonderful. Thanks!

One more question though...what should the rest of my setting be at? I changed my RGB to the new settings but didn't really see much of a difference. I'm currently in "Standard" mode with everything set at default. Is this where I should be?

Thanks.

guitarman used theater pro setting(I prefer the standard), all the other enhancements off except the color management one. Run through the Avia or DVE dvds to set your color and what not and you should be golden. The changes performed should get you an accurate grayscale, it is hard to be exact without having the set calibrated by a pro but better gray is better color. D65 is the holy grail around here on AVS. This thread has several members settings back from post 1 to 50 or so it is worth the read to tweak it out.
post #3221 of 3765
Thanks!
post #3222 of 3765
"Anyway Red and Blue fell 10% short of D65k evenly across each shades of gray. Green was .05% high over D65k all across the shades of gray."

This was my particular TV, green being high and R/B being low would show you there's a slight green bias to the grays. Which is why the recent talk about my blacks look a little greenish was said.

I failed to mention something important. Since the service RGB-drives are uniform (only 1 alteration is memorized) I used the Accupel to tune up for HDTV (HDMI/720p) my preference. Important HDTV brightness setting is -12 and contrast/Picture is at +30, color -03, tint -04, Detail -15 and Theater mode was used.

But the underlying set balance should hold over pretty good for DVD. Since I use component cables for DVD with an analog Faroudja player (Phillips Q50). I would just use the Avia disc to set the proper black and white levels. You could tune color and tint also. The JVC user area does remember seperate tunings per signal input.

What I got for 480p/DVD over component is -
Theater
Tint +01
Color -05
Picture +30
Bright -05
Detail -15
Color temp low

It's all subjective really. Things will change when I install the new bulb. I'll order a bulb and start over. Remember right now my black level is at 21 ft-lamberts. That's 1/3 of the best new 1080p's black level with it's Iris tuned down for best CR.

The JVC gets better with age.
post #3223 of 3765
Quote:
Originally Posted by ebs View Post

I am a brand new HD61FH96 owner and I have a question (problem?). I have adjusted the basic picture controls to produce a good (to me) picture: Theater Mode, RGB settings at 0, etc. Watching standard cable TV on the new set shows good color.

However, the first DVD I watched was the newest "King Kong". I noticed many areas of green on the black fur of the ape. I tried another DVD with B&W test patterns and it also shows green where gray/black should be. I am using the component/progressive video outputs of my DVD recorder - a cheap WalMart ILO unit. I don't see a green cast to any other colors; in fact, I probably wouldn't have noticed this as quickly if I was watching another DVD.

Since I don't notice the green areas on sources other than the DVD, could my recorder be the problem? I have no other televisions that will accept component inputs; just an S-video input on my old 27" tube set. How would you recommend that I troubleshoot this?

Thanks for any assistance.

Here's what you need to do if my tuning numbers don't work for you.

Look at a pattern like this one -
http://www.cigarbest.com/sales/JVCDLIA3.jpg

You'll be tuning up DVD most likely. First do the basics with Avia. Then go into the service menu and increase the Red & Blue Drives up until the Gray Bars in the pattern I showed you show no green bias. The green will be easiest to see in the darker shades of gray. This should help to take the green out of the blacks that you're seeing. Re-tune with Avia after you've made service-drive changes. Always write down your origianal service drive numbers for safe keeping.
Good luck and better blacks.

One more thing, the HDTV signal is a different brightness level all together. So copy the difference I got with the Accupel. Make your HDTV brightness 7 clicks lower than component DVD.
post #3224 of 3765
I had this happen tonight (never happened before). I could not turn on the TV until I unplugged it and plugged it in again. Is this something that signals problems to come? Thanks in advance for any info.
post #3225 of 3765
I have owned the 56G for over 9 months and had that situation happen one time.
I also unplugged and plugged to make it work. I assumed the problem was as stated in the Troubleshooting section of the manual: "It may be a malfunction of the internal electrical circuits". It also refers to the microprocessor and says: "If the television does not function correctly, remove the electrical plug from the wall outlet and wait a while before inserting it into the wall outlet again and operating the television."
esteps

Quote:
Originally Posted by dapercy View Post

I had this happen tonight (never happened before). I could not turn on the TV until I unplugged it and plugged it in again. Is this something that signals problems to come? Thanks in advance for any info.
post #3226 of 3765
Quote:
Originally Posted by esteps View Post

I have owned the 56G for over 9 months and had that situation happen one time.
I also unplugged and plugged to make it work. I assumed the problem was as stated in the Troubleshooting section of the manual: "It may be a malfunction of the internal electrical circuits". It also refers to the microprocessor and says: "If the television does not function correctly, remove the electrical plug from the wall outlet and wait a while before inserting it into the wall outlet again and operating the television."
esteps

It always struck me that these sets have more in common with a computer than the CRT TV's we have known for decades. I understand that they use firmware probably based on linux. So if they lock up once in a while, fine; unplugging them for a bit is the solution. I just hope that's all it is.
post #3227 of 3765
Well, for my first post here and after reading 54 pages of this 108 page thread I wanted to welcome myself to the forum, this thread and as a new owner of a JVC HD52G786 HD-ILA!

Having said that, I bought an open box from the local BB after some serious consideration, a little research and considerable soul-searching! This particular unit just had the buld changed and is a return. The manufacturing date of the one I am picking up is either June or August 2005 - depending on which one I get as both just had bulbs replaced.

After reading through the 54 pages before heading here I just wanted to say hello, subscribe to this thread and look for any suggestions or highlights others might want to share.

Sorry for the intrusion but I have been holding off moving to HD for several years now and am so happy to retire the seven-year old Toshiba 50" RPTV that you have to occassionaly have to smack in order for the colors to re-align....

I am sure I will have questions, concerns and the like and hope I can obtain some support here. Now I just have to pick it up tomorrow and begin the installation and conversion!
post #3228 of 3765
Welcome aboard zettler.
post #3229 of 3765
I'm new here so I hope this is an ok place to ask about a 52Z575. I bought this set in June of 2005 and just recently got a HDMI player. HDMI looks great except sometimes in really flat scenes, it seems to outline the contour bands with darker colors than the bands (almost like a wood grain). I do not see this when I connect with component. Also when I connect the player with HDMI to a friends set, it looks fine. It's almost as if the 52Z575 is altering the digital input.

Is this a common artifact for these D-ILA Z sets? Or is there something wrong with my set.
post #3230 of 3765
Quote:
Originally Posted by danole View Post

I'm new here so I hope this is an ok place to ask about a 52Z575. I bought this set in June of 2005 and just recently got a HDMI player. HDMI looks great except sometimes in really flat scenes, it seems to outline the contour bands with darker colors than the bands (almost like a wood grain). I do not see this when I connect with component. Also when I connect the player with HDMI to a friends set, it looks fine. It's almost as if the 52Z575 is altering the digital input.

Is this a common artifact for these D-ILA Z sets? Or is there something wrong with my set.

Sounds to me like "macroblocking" maybe? I noticed this on my 52z as well.
post #3231 of 3765
Quote:
Originally Posted by darthrsg View Post

Sounds to me like "macroblocking" maybe? I noticed this on my 52z as well.

Hi darthrsg.

Could the 52z cause macroblocking? I don't see it on other HDMI capable sets using the same player. I could post a picture of the artifact and another of the much better picture I get using the component inputs. It's really odd because most of the time HDMI looks great, but get a low contrast scene and there it is: color bands that are separated by darker lines.

If it is just an inherit problem with these model sets, then I'll give up. But if it something that just needs adjustment...
post #3232 of 3765
Please post some pics.
post #3233 of 3765
After 4 calls to 4 techs, the last advised JVC lamps were not made to JVC specs until after 11/2005. They had a lot of early lamp failures - same troubleshooting as "internal wiring" - both blue and orange blinking simultaneously, only I had heard a crackling pop when the bulb exploded inside its protective lens.
After 8 days I am still waiting on my overnite warranty replacement. Be careful ordering the "cheap lamps" from Discount Merchant Electronics that come without the JVC brown box and instructions - they say they bought up JVC oversupply. Obviously JVC hasn't had enough lamps to send me one and any oversupply might be the known defective lamps that blow in first 180 days......
Wouldn't an ethical firm had sent out a product recall notice and sent a new lamp to every registered owner??? Product has been great otherwise, but .......
post #3234 of 3765
Sorry to hear about your lamp problems.

My lamp went out on May 19, at about 3200 hours since last May 27. I ordered a new lamp that night, then went out of town, hoping that I'd receive the new lamp by the time I returned. As it turns out, the lamp shipped sooner than indicated and was delivered last Friday to my neighbor (I'm still out of town).

Basically, it was one week from blowing to replacement just ordering through the JVC website. I'd think that it shouldn't take 8 days to overnight a lamp.

I hope that gets straightened out for you.
post #3235 of 3765
Quote:
Originally Posted by Ktulu_1 View Post

Please post some pics.

I haven't uploaded pics before, so I hope this works...

Ok, here are some examples. The first is a cloud scene that looks good with component and looks badly contoured with HDMI. Same source, just selected different input to set. The third is a good example of the artifact that seems to show up on quite often on low contrast walls.

Note that I stretched the contrast and increased the brightness of these pictures on my computer to make the artifact stand out. It's not quite this bad in real life.
LL
LL
LL
post #3236 of 3765
What's the source?
post #3237 of 3765
Sure looks like macroblocking to me. Sometimes I see MB on my 56G from satellite broadcasts, but also my Samsung 941 produces MB when I play DVDs.
esteps

Quote:
Originally Posted by danole View Post

I haven't uploaded pics before, so I hope this works...

Ok, here are some examples. The first is a cloud scene that looks good with component and looks badly contoured with HDMI. Same source, just selected different input to set. The third is a good example of the artifact that seems to show up on quite often on low contrast walls.
post #3238 of 3765
danole.....

I had the exact same problem your describing when I owned this JVC

Mated with a Sony 3100Es DVD player, HDMI looked like macroblocking, but through component the same source looked fine..........
post #3239 of 3765
looks like compression artifacts to me...
post #3240 of 3765
My understanding is that unless you have an HD DVD player playing an HD DVD, using HDMI will not improve the picture quality. Component is as good as it gets with Standard DVD's.
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