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aspec2
Joined: 10 Apr 2006
Posts: 549
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| Posted: Mon Apr 14, 2008 3:40 pm Post subject: |
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The way I remember with my Marquee, to distinguish which I am adjusting, is that dddddrive is not for ddddark.
Walt
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MikeEby
Joined: 24 Jun 2007
Posts: 5237
Location: Osceola, Indiana
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| Posted: Mon Apr 14, 2008 3:55 pm Post subject: |
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| kal wrote: | | MikeEby wrote: | | kal wrote: | Thanks Kai. So in the PG and XG menus how exactly are they labelled ? They can't just have a menu item called ""W" and "B" do that? That seems kind of odd.
Kal |
On an XG remote hit Kelvin key>Enter passcode>kelvin key again to enter the White Balance adjustments then ctrl>R for red, ctrl>G for green and ctrl>B for Blue. Does that make sence? the menus are too slow. It's much faster to use the remote keys.
Mike |
Yes, but that's for the advanced users. For the newbies I still want to describe what it's called in the menus so that they know how to at least find it as this'll be the first time most of them do this. I want it to be the simplest way to understand, not the simplest way to implement.
Kal |
Adjust> enter passcode > Kelvin > White Bal. then ctl>R for red, ctl>G for green and ctl>B for blue.
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kschmit2
Joined: 09 Mar 2006
Posts: 1141
Location: Heidelberg, Germany
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| Posted: Mon Apr 14, 2008 4:00 pm Post subject: |
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While in the white balance adjustment mode the OSD will display 2 sliders. One is labeled W or WHT, the other is labeled B or BLK.
You also have to choose the tube to be adjusted using CTRL + R/G/B. The OSD will also display the tube to be adjusted.
The actual adjustments are then done with the up, down, left and right arrows as described in my previous post.
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MikeEby
Joined: 24 Jun 2007
Posts: 5237
Location: Osceola, Indiana
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| Posted: Mon Apr 14, 2008 4:04 pm Post subject: |
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| kschmit2 wrote: | While in the white balance adjustment mode the OSD will display 2 sliders. One is labeled W or WHT, the other is labeled B or BLK.
You also have to choose the tube to be adjusted using CTRL + R/G/B. The OSD will also display the tube to be adjusted.
The actual adjustments are then done with the up, down, left and right arrows as described in my previous post. |
Kai,
Should the Color Temp be set to midpoint for D6500?
Mike
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kal
Forum Administrator
Joined: 06 Mar 2006
Posts: 18114
Location: Ottawa, Canada
TV/Projector: JVC DLA-NZ7
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| Posted: Mon Apr 14, 2008 6:39 pm Post subject: |
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| stefuel wrote: | AmPro calls it "running and not running" 
Actually "sub brightness and sub contrast"
That's why AmPros suck so bad. This is all they have.
Master contrast
Master brightness
G2 control
sub contrast
sub brightness
9 zone contrast modulation (optional) I have it.
gamma (optional) I have it.
What I don't have is up-gradeitis  |
So which of these controls the tube cutoff? Which one controls the tube gain or drive? I need to map these out for people so that when I say "adjust the cutoff" an Ampro user knows what to adjust.
Kal
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Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
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| Posted: Mon Apr 14, 2008 7:24 pm Post subject: |
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Ok For the Marquee, there is no Cut-off . They only have G2 and drive adjustments on the same screen in the service menu. There are no other pots anywhere in the projector to adjust for cut-off unless they are under the epoxy coverd pots on the neck board. The Grid value measured changes as you adjust the G2 value in the service menu for color temp adjustments. So I agree with Tim that G2 is the bias and Drive is Drive as in other brands. This is why, Kal ,I asked you to add G2 to the Biased description in the other thread. I'll read over the service manual to see if they mention Cut off anywhere. I think Curt knows what those epoxy coverd pots on the neck board adjust, IIRC he mentioned it recently somewhere.
Ok I found his post to a Mike parker Micron problem that someone had on his neck board.
CURT PALME QUOTE:
| Quote: | I know the shutoff problem. That is most likely a slight corrosion on the trimpot that sets the cutoff. I've had that twice on neckboards. THe trimpot is under a blob of silicone so that you can't see it. Carefully chip away at the silicone to expose the pot, and rotate slightly. I'll bet the problem will go away.
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Athanasios
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kal
Forum Administrator
Joined: 06 Mar 2006
Posts: 18114
Location: Ottawa, Canada
TV/Projector: JVC DLA-NZ7
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| Posted: Mon Apr 14, 2008 8:27 pm Post subject: |
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| Nashou66 wrote: | | Ok For the Marquee, there is no Cut-off . They only have G2 and drive adjustments on the same screen in the service menu. There are no other pots anywhere in the projector to adjust for cut-off unless they are under the epoxy coverd pots on the neck board. The Grid value measured changes as you adjust the G2 value in the service menu for color temp adjustments. So I agree with Tim that G2 is the bias and Drive is Drive as in other brands. This is why, Kal ,I asked you to add G2 to the Biased description in the other thread. I'll read over the service manual to see if they mention Cut off anywhere. I think Curt knows what those epoxy coverd pots on the neck board adjust, IIRC he mentioned it recently somewhere. |
Ok - thanks - So far in the article I've written:
| Quote: |
Who can use this procedure?
If your projector or TV has the 2 last controls mentioned previously (cutoff/bias, drive/gain) or variants thereof, you will be able to calibrate your greyscale. All displays have brightness and contrast controls.
This means that 99% of CRT and digital projectors as well as many LCD, DLP, Plasma flat panel displays can have their greyscale calibrated. Sensor placement will of course be a bit different for direct-view (non-projection) sets: You will place the sensor directly on the display instead of facing a screen.
Regardless of the display you have, check your user manual for how to access these controls using the remote.
Different manufacturers use different names for the Cutoff and Drive controls. Refer to your user manual and look for a section on "greyscale" or "white balance" adjustment. CRT projector owners can access their user manuals here (free download).
Cutoff/Drive control names for various CRT projector brands:
Ampro: Sub-Brite, Sub-Contrast
Barco: Cutoff, Drive
Dwin: Level, Gain
Electrohome ECP: G2, Drive
Electrohome Marquee/Madrigal: G2, Drive
NEC PG/Runco: B, W
NEC XG/Runco: BLK, WHT
Runco: See the Runco cross reference table.
Seleco: Black, White
Sony: Bias, Gain
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The Zenith 841/851/895/900 only seem to have one control per colour (not 2) so I'm not going to mention them. Everything else seems to be pretty covered.
Kal
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Gino
Joined: 22 Apr 2006
Posts: 1363
Location: Trinity Beach, AUSTRALIA
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| Posted: Tue Apr 15, 2008 12:09 am Post subject: |
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| Nashou66 wrote: | Ok For the Marquee, there is no Cut-off . They only have G2 and drive adjustments on the same screen in the service menu. There are no other pots anywhere in the projector to adjust for cut-off unless they are under the epoxy coverd pots on the neck board. The Grid value measured changes as you adjust the G2 value in the service menu for color temp adjustments. So I agree with Tim that G2 is the bias and Drive is Drive as in other brands. This is why, Kal ,I asked you to add G2 to the Biased description in the other thread. I'll read over the service manual to see if they mention Cut off anywhere. I think Curt knows what those epoxy coverd pots on the neck board adjust, IIRC he mentioned it recently somewhere.
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That's exactly where they are. MP uncovers those for you with his Mikron VNB's. He also adds some cut off pots on the VIM too.
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Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
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| Posted: Tue Apr 15, 2008 12:31 am Post subject: |
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| Gino wrote: | | Nashou66 wrote: | Ok For the Marquee, there is no Cut-off . They only have G2 and drive adjustments on the same screen in the service menu. There are no other pots anywhere in the projector to adjust for cut-off unless they are under the epoxy coverd pots on the neck board. The Grid value measured changes as you adjust the G2 value in the service menu for color temp adjustments. So I agree with Tim that G2 is the bias and Drive is Drive as in other brands. This is why, Kal ,I asked you to add G2 to the Biased description in the other thread. I'll read over the service manual to see if they mention Cut off anywhere. I think Curt knows what those epoxy coverd pots on the neck board adjust, IIRC he mentioned it recently somewhere.
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That's exactly where they are. MP uncovers those for you with his Mikron VNB's. He also adds some cut off pots on the VIM too. |
Cool so you can then adjust them for even better grey scale and color calibration... right?
Athanasios
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Marquee Modifications and Performance Enhancement
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Mark_A_W
Joined: 15 Mar 2006
Posts: 3068
Location: Sunny Melbourne Australia
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| Posted: Tue Apr 15, 2008 12:35 am Post subject: |
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| MikeEby wrote: | | kal wrote: | Thanks Kai. So in the PG and XG menus how exactly are they labelled ? They can't just have a menu item called ""W" and "B" do that? That seems kind of odd.
Kal |
On an XG remote hit Kelvin key>Enter passcode>kelvin key again to enter the White Balance adjustments then ctrl>R for red, ctrl>G for green and ctrl>B for Blue. Does that make sence? the menus are too slow. It's much faster to use the remote keys.
Mike |
You have to press Kelvin twice the second time if you do it this way. Otherwise you are at the colour temp menu (as in 5200K------6500K-------9300K slider bar).
It's actually quite simple despite the barrage of posts about NECs.
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MikeEby
Joined: 24 Jun 2007
Posts: 5237
Location: Osceola, Indiana
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| Posted: Tue Apr 15, 2008 1:14 am Post subject: |
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| Mark_A_W wrote: | | MikeEby wrote: | | kal wrote: | Thanks Kai. So in the PG and XG menus how exactly are they labelled ? They can't just have a menu item called ""W" and "B" do that? That seems kind of odd.
Kal |
On an XG remote hit Kelvin key>Enter passcode>kelvin key again to enter the White Balance adjustments then ctrl>R for red, ctrl>G for green and ctrl>B for Blue. Does that make sence? the menus are too slow. It's much faster to use the remote keys.
Mike |
You have to press Kelvin twice the second time if you do it this way. Otherwise you are at the colour temp menu (as in 5200K------6500K-------9300K slider bar).
It's actually quite simple despite the barrage of posts about NECs. |
Ahh, thanks for the correction I was doing from memory, and my memory must be faulty. I looked the menu commands up in the manual to be sure they were correct.
An XG is very consistent in the way things work once you get the hang of it.
When you set gray scale should you have the color temp set midpoint then adjust white balance?
Mike
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kal
Forum Administrator
Joined: 06 Mar 2006
Posts: 18114
Location: Ottawa, Canada
TV/Projector: JVC DLA-NZ7
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Gino
Joined: 22 Apr 2006
Posts: 1363
Location: Trinity Beach, AUSTRALIA
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| Posted: Tue Apr 15, 2008 11:27 pm Post subject: |
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| Nashou66 wrote: | | Gino wrote: | | Nashou66 wrote: | Ok For the Marquee, there is no Cut-off . They only have G2 and drive adjustments on the same screen in the service menu. There are no other pots anywhere in the projector to adjust for cut-off unless they are under the epoxy coverd pots on the neck board. The Grid value measured changes as you adjust the G2 value in the service menu for color temp adjustments. So I agree with Tim that G2 is the bias and Drive is Drive as in other brands. This is why, Kal ,I asked you to add G2 to the Biased description in the other thread. I'll read over the service manual to see if they mention Cut off anywhere. I think Curt knows what those epoxy coverd pots on the neck board adjust, IIRC he mentioned it recently somewhere.
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That's exactly where they are. MP uncovers those for you with his Mikron VNB's. He also adds some cut off pots on the VIM too. |
Cool so you can then adjust them for even better grey scale and color calibration... right?
Athanasios |
It appears tse/scott has shed some light on the pots on stock neckboards. However, MP quite possibly added his own to allow these adjustments. Can't say I have played around with the pots on the neck boards, as MP said he has set these correctly for me. The one on the VIM however really helps set the black pedestal correctly.
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