Strange VB on 700

[fallwood]

Got my 700 yesterday and spent all last night setting it up and testing. Did the flicker tweak after it had been on for about 3 hours and all was fine. Got up this morning turned it on and VB was huge, went into flicker tweak and it was a mile off, read that someone had this prob after he turned it off at mains but mine was in standby all night. Have re-adjusted flicker and it seems ok, how long does it take for a 700 to settle down after first using it.

[fallwood]

came in tonight and turned pj on and flicker tweak has changed again. it seems to depend on how long the pj has been on when i do the adjustment, if i adjust it when its been on for a few hours it then looks bad when its first turned on, if i adjust it after about 30mins it then looks bad a few hours later. Didnt have this problem on my 500 adjusted it once after a few hours of use and it never needed touching. What the hell is going on ??.

[fallwood]

Anybody ?.

[andhoey]

sorry to hear about the vb. there was a mention of settings changing in another thread could've been philfyspoon in 'my review'. i should be getin my 700 next week hopefully so im very interested in any probs thats happening. where did you get it from and what inputs are you using.
p.s thought i'd reply cos its a pain when nobody wants to chat.
off to fix ma car now.

[fallwood]

Thanks for the reply. i was begining to think id upset everybody for some reason. I got it from krish av , Im using it mostly through vga via a hcpc with radeon 9600 se. Cant suss the flicker tweak it just keeps changing, Ive opted for a middle ground setting that gives some vb for an hour or so and then calms down, bit of a pain if I want to watch a film immediately and the pj hasnt been on, this is fairly rare though as its used as my main tv so its on most of the time. Thing that bugs me the most is that this didnt happen on my 500 and vb was the main reason I upgraded (3 months after buying my 500 which is now away for refund or repair).Anyone else seeing such huge changes in vb depending on how long the pj has been on.

yes i have same

the problem is that the VB is very obviously temperature dependant

so when you set it up and do the tweak by adjusting the panel flicker if you set it up straight away then as the pj warms it changes.

i have about three different settings for each panel - one for when i first swicth on, another for after half an hour, and a third for an hour +

another trick is that the best result is not by nulling each panel. i null the blue and red, and then i adjust the flicker on the green. if you go to the service menu with the test patterns, there is a white screen i think on the 5th item in, and this is the one that you want to null the flicker on.

when i first got my pj i could not see any vb but now i can see it. it can be minimised but it takes a bit of trila and error. the dissapointing thing is that they could have put a bit of circuitry in to auto tune the vb to minimal rather than us having to do it manual.

i have characterised my panels with respect to vb now so i can easily minimise it now.

anyone who says this pj unit has no vb is not telling the truth methinks.

[andhoey]

that sounds a total pain in the butt i think i'll just cancel the order making adjustments all the time while watching a movie would totally ruin it for me. im surprised there hasnt been more on this topic of constant adjustments. i would much prefer the rainbows to that
could it be the lcd panels contracting & expanding therefore the distance between pixels changing.
maybe we should start emailing pana for a firmware upgrade to automaticaly adjust settings.

[fallwood]

Funny thing is that my mate doesnt have this problem with his, when he got it a few weeks ago I adjusted it for him and its been fine ever since, looks the same when its first turned on as it does after its been on all night. My unit is ceiling mounted could it be that it only effects units that are in ceiling mode or could it be an issue that only effects a few machines, just my luck to get another of the "small number of machines effected " units (my ea100 & 500 both had the flicker problem, glad to say my 700 doesnt "yet")

[andhoey]

you should swap pj's with him and see what happens(machines i meant)

Can anybody tell me how to remove/minimize the VB... PLEASE ??

I have requested this info on other threads but nobody have posted the info...

Please please... TIA

[Keith Hurst]

Originally Posted by scot1314

anyone who says this pj unit has no vb is not telling the truth methinks.

When I demod the AE700 down at Ben's I never saw any VB. I have since installed it in my house projecting onto a 203cm DRH Slimline. A friend who also demod one at Ben's, and did see VB on that unit, never saw any on the one I have in the house. Either that or my eyesight is going lol

Some people have said that when going into the setup to adjust the flicker tweak the panels were flickering away like mad. I go into the setup on this and the colours are completely stable.

I think that the VB issue on the AE700 has to be on a unit by unit basis, it doesn't seem to be across the board. Currently through setting up and just general use, my AE700 has approx 20 hours on it. Hope it doesn't develop VB after settling down.

Regards
Keith Hurst

[miker]

firstly Beano - HOW TO REMOVE VB - I am not convinced anyone knows for sure - when I find out I will try and remember to tell you. But the flicker tweak is flavour of the month right now. How to do that - go into the menu and hold down the ENTER button for 5 secs over the OSD menu option. The rest you will see.

2nd -
Only had my AE700 for 3 days. Because I got a new 2910 as well, it was only last night I had finished tweaking! Anyway. There are many issues with this sort of technology and the media. I have learnt that the better your equipment the more fussy the film. I admit over the nine hours of viewing I have seen VB once or twice for around 2 secs. I watched the whole of Day After Tomorrow last night without one problem and was very impressed - Faultless.. And I am very fussy! I too think the amount of VB you get depends on the projector. Right now (and this may change if VB returns) my best solution was to adjust the gamma in the HIGH. (in the advanced menu)

by the way I am running 720/750p on HDMI. With Enhanced black turned on.

3rd - Automatic Iris!!! Has anyone heard this! When you turn the AE700 on I get a double clunk type of sound. That is the Iris opening and closing in a sort of self test. The problem is when watching Titanic there is a part where they are under water and the lights are flickering in the film. Of course the Iris is trying to keep up and, low and behold, CLUNK CLUNK.

Has anyone else noticed this??

Very rare I know but as this is the forum of knowledge I would like to find out if it is just my unit that has faulty 'big ends'

Thanks for the tips

I'll try that tonite.... I'v read about the hiden "Flicker menu" but I didn't know if that could be used for minimizing VB.

My observations reg. VB is that they are quite visible for the first 30 min, then they seems to fade away as the projector getting warmer.
Quite annoying

Similarly, VB is an issue for me only for the first 30-40 minutes of projector use, when it has reached a normal operating temperature there is no VB at all.
This initial VB can be reduced by adjusting the flicker every 15 minutes or so, but it is still there until the projector is warm (and you put the flicker back to 25-26 factory setting). Also there is the possibility that VB will disappear (or get worse!) over time, most peoples 700's are pretty new, mine has only 19 hours of use, so who knows.
I show some cartoons & shorts before the main feature each evening whilst it is warming up
No idea if VB is dependent upon the signal, as has been suggested. I am using a 10m SVHS cable until my HDMI cable arrives, I'll see if it changes things. I doubt it, VB seems like a design 'feature' of the projector rather than 'noise'.

On the subject of iris noise, I have heard it as it starts up, very quiet, this is only perceptable in a completely silent room. When a film is running with sound then I can't hear anything. This is with the projector mounted on a shelf just 50cm above my head.

Originally Posted by Lapinou

Also there is the possibility that VB will disappear (or get worse!) over time, most peoples 700's are pretty new, mine has only 19 hours of use, so who knows.

Stop it !... You are scaring me

Actually I'm quite sure that there were no VBs when the projector was new.
I have now used it for about 50 hours.