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AnalogRocks
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Location: Toronto, Ontario, Canada
TV/Projector: Sony 1252Q, AMPRO 4000G
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 Link Posted: Sun May 11, 2008 3:55 am Post subject: What causes a red push on VGA monitor? |
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I have a HP 1110 21" CRT monitor that has a red raster. Any idea how to correct this? I've tried the color adjustment menu.
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macgyver655
Joined: 22 Aug 2007
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| Link Posted: Sun May 11, 2008 4:02 am Post subject: |
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Ok. We have to stop meeting like this. Its could be a shorted drive xsistor on the crt card or at the output of the jungle ic. Could also be the tube. Short on gun similar to projector tube problem with one tube emitting all the time.
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macgyver655
Joined: 22 Aug 2007
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| Link Posted: Sun May 11, 2008 4:04 am Post subject: |
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Oh. And lets not forget possible bad solder joints on either.
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macgyver655
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| Link Posted: Sun May 11, 2008 4:07 am Post subject: |
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Is that an HP or a DELL.......
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macgyver655
Joined: 22 Aug 2007
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| Link Posted: Sun May 11, 2008 4:38 am Post subject: |
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Ok, if that is a Dell 1110 which I think it is, I just scanned over the schematics and I have some things you can try to narrow it down. Let me know if your game.
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AnalogRocks
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Location: Toronto, Ontario, Canada
TV/Projector: Sony 1252Q, AMPRO 4000G
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| Link Posted: Sun May 11, 2008 6:21 pm Post subject: |
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Geeze Mac, you really love this stuff don't you? 
It's the HP monitor. I'm doing spring cleaning here and getting rid of the surplus CRT monitors. My friend was helping me move my PJ case and the HP monitor was on top of it. I gave the HP to him, I was just wondering what causes the red push.
I was very surprised with that monitor. The spec's say 1880x1440 at 85Hz but we ran it up to 1080P/72. The picture was great.
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perisoft
Joined: 29 Aug 2007
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Location: Ithaca, NY
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| Link Posted: Sun May 11, 2008 6:51 pm Post subject: |
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Hmm, I've got a Dell P1110 that acts as if the brightness is cranked up way too high. Not a single channel, though - all of the rasters are lit up, so black is 15% or 20% gray. They're fantastic monitors aside from that, though... I've got another one that's perfect that I use as my main at work. Would like to get two of the 24" of that variety and use one at home and one at work, with the 21"s for secondaries.
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AnalogRocks
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Location: Toronto, Ontario, Canada
TV/Projector: Sony 1252Q, AMPRO 4000G
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| Link Posted: Sun May 11, 2008 6:54 pm Post subject: |
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| perisoft wrote: | | Hmm, I've got a Dell P1110 that acts as if the brightness is cranked up way too high. Not a single channel, though - all of the rasters are lit up, so black is 15% or 20% gray. They're fantastic monitors aside from that, though... I've got another one that's perfect that I use as my main at work. Would like to get two of the 24" of that variety and use one at home and one at work, with the 21"s for secondaries. |
Yes that's exactly it. 15-20% to high but only on the red chanel on this one. Must be a common problem.
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macgyver655
Joined: 22 Aug 2007
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| Link Posted: Sun May 11, 2008 7:14 pm Post subject: |
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| AnalogRocks wrote: | Geeze Mac, you really love this stuff don't you?
It's the HP monitor. I'm doing spring cleaning here and getting rid of the surplus CRT monitors. My friend was helping me move my PJ case and the HP monitor was on top of it. I gave the HP to him, I was just wondering what causes the red push.
I was very surprised with that monitor. The spec's say 1880x1440 at 85Hz but we ran it up to 1080P/72. The picture was great. |
Yes, I'm breathing solder smoke as I type.
Couldn't find that model under HP at first but it did come up under Dell. This is the one your talking about, right:
http://h20000.www2.hp.com/bizsupport/TechSupport/Home.jsp?lang=en&cc=us&prodTypeId=382087&prodSeriesId=298697&submit.y=0&submit.x=0&lang=en&cc=us
Funny thing is they are all made by Sony, so I have the correct manual if you need it. I'm assuming you tried reducing the red in the monitor color adjustment. Let me know if you need it. Later !
What surprised you about the spec?
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macgyver655
Joined: 22 Aug 2007
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| Link Posted: Sun May 11, 2008 7:16 pm Post subject: |
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| perisoft wrote: | | Hmm, I've got a Dell P1110 that acts as if the brightness is cranked up way too high. Not a single channel, though - all of the rasters are lit up, so black is 15% or 20% gray. They're fantastic monitors aside from that, though... I've got another one that's perfect that I use as my main at work. Would like to get two of the 24" of that variety and use one at home and one at work, with the 21"s for secondaries. |
There is a repair for that brightness issue. I'll see if I can find it.
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AnalogRocks
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Posts: 20964
Location: Toronto, Ontario, Canada
TV/Projector: Sony 1252Q, AMPRO 4000G
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| Link Posted: Sun May 11, 2008 7:19 pm Post subject: |
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| macgyver655 wrote: | | AnalogRocks wrote: | Geeze Mac, you really love this stuff don't you?
It's the HP monitor. I'm doing spring cleaning here and getting rid of the surplus CRT monitors. My friend was helping me move my PJ case and the HP monitor was on top of it. I gave the HP to him, I was just wondering what causes the red push.
I was very surprised with that monitor. The spec's say 1880x1440 at 85Hz but we ran it up to 1080P/72. The picture was great. |
Yes, I'm breathing solder smoke as I type.
Couldn't find that model under HP at first but it did come up under Dell. This is the one your talking about, right:
http://h20000.www2.hp.com/bizsupport/TechSupport/Home.jsp?lang=en&cc=us&prodTypeId=382087&prodSeriesId=298697&submit.y=0&submit.x=0&lang=en&cc=us
Funny thing is they are all made by Sony, so I have the correct manual if you need it. I'm assuming you tried reducing the red in the monitor color adjustment. Let me know if you need it. Later !
What surprised you about the spec? |
I saw this page: http://www.ciao.com/HP_P1110__15406069
Display
Diagonal Size: 21"
Viewable Size: 19.8"
Dot Pitch / Pixel Pitch: 0.24 mm
Max Resolution: 1800 x 1440 / 80 Hz
Max Sync Rate (V x H): 180 Hz x 121 kHz
and just saw the 1800 x 1440 @ 80Hz. I didn't think it would like 1080P72, or it would have been a little soft.
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macgyver655
Joined: 22 Aug 2007
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| Link Posted: Sun May 11, 2008 7:32 pm Post subject: |
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| macgyver655 wrote: | | perisoft wrote: | | Hmm, I've got a Dell P1110 that acts as if the brightness is cranked up way too high. Not a single channel, though - all of the rasters are lit up, so black is 15% or 20% gray. They're fantastic monitors aside from that, though... I've got another one that's perfect that I use as my main at work. Would like to get two of the 24" of that variety and use one at home and one at work, with the 21"s for secondaries. |
There is a repair for that brightness issue. I'll see if I can find it. |
Here ya go:
http://eric.hutzelman.com/articles/1-Sony-CRT-Brightness-Fix
Does either of you have expert mode under your color adjustment mode?
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perisoft
Joined: 29 Aug 2007
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Location: Ithaca, NY
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| Link Posted: Sun May 11, 2008 7:42 pm Post subject: |
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Macgyver, you rock!
I've got expert mode, yeah. Gain & bias don't fix the problem with the one I've got. Basically I have to turn stuff all the way down to get things reasonable. Can't quite remember how I have it set now, though.
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AnalogRocks
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Posts: 20964
Location: Toronto, Ontario, Canada
TV/Projector: Sony 1252Q, AMPRO 4000G
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| Link Posted: Sun May 11, 2008 7:54 pm Post subject: |
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| macgyver655 wrote: | | macgyver655 wrote: | | perisoft wrote: | | Hmm, I've got a Dell P1110 that acts as if the brightness is cranked up way too high. Not a single channel, though - all of the rasters are lit up, so black is 15% or 20% gray. They're fantastic monitors aside from that, though... I've got another one that's perfect that I use as my main at work. Would like to get two of the 24" of that variety and use one at home and one at work, with the 21"s for secondaries. |
There is a repair for that brightness issue. I'll see if I can find it. |
Here ya go:
http://eric.hutzelman.com/articles/1-Sony-CRT-Brightness-Fix
Does either of you have expert mode under your color adjustment mode? |
In that article he say's it's not the "right way" to fix this? What is? Did anyone ever figure out why these monitor's do this?
It probalby affect's the SONY G400, G500 and G520P as well. I've got 2 520P's and I've passed on a couple of G400's that didn't have the greatest contrast.
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macgyver655
Joined: 22 Aug 2007
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| Link Posted: Sun May 11, 2008 8:07 pm Post subject: |
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| perisoft wrote: | Macgyver, you rock!
I've got expert mode, yeah. Gain & bias don't fix the problem with the one I've got. Basically I have to turn stuff all the way down to get things reasonable. Can't quite remember how I have it set now, though. |
After you do the mod, do a factory reset. If your not sure how I have the manual.
Analog, this is actually the fix, the comment was only made because Sony didn't come up with it and yes the issue affects HP, Dell, Compaq and Sony because they are all made by Sony, just relabeled.
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AnalogRocks
Moderator
Joined: 08 Mar 2006
Posts: 20964
Location: Toronto, Ontario, Canada
TV/Projector: Sony 1252Q, AMPRO 4000G
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| Link Posted: Sun May 11, 2008 8:24 pm Post subject: |
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| macgyver655 wrote: | | perisoft wrote: | Macgyver, you rock!
I've got expert mode, yeah. Gain & bias don't fix the problem with the one I've got. Basically I have to turn stuff all the way down to get things reasonable. Can't quite remember how I have it set now, though. |
After you do the mod, do a factory reset. If your not sure how I have the manual.
Analog, this is actually the fix, the comment was only made because Sony didn't come up with it and yes the issue affects HP, Dell, Compaq and Sony because they are all made by Sony, just relabeled. |
Ok so this cover's a "too bright" raster issue, but the "red push" would be caused by soemthing else right? As you said
| Mac wrote: |
Its could be a shorted drive xsistor on the crt card or at the output of the jungle ic. Could also be the tube. Short on gun similar to projector tube problem with one tube emitting all the time. |
For this I can just grab a meter and test the drive transtor on the neck card? How would I tell if it's the jungle IC?
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HD done right!
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macgyver655
Joined: 22 Aug 2007
Posts: 6954
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| Link Posted: Sun May 11, 2008 9:18 pm Post subject: |
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| AnalogRocks wrote: | | macgyver655 wrote: | | perisoft wrote: | Macgyver, you rock!
I've got expert mode, yeah. Gain & bias don't fix the problem with the one I've got. Basically I have to turn stuff all the way down to get things reasonable. Can't quite remember how I have it set now, though. |
After you do the mod, do a factory reset. If your not sure how I have the manual.
Analog, this is actually the fix, the comment was only made because Sony didn't come up with it and yes the issue affects HP, Dell, Compaq and Sony because they are all made by Sony, just relabeled. |
Ok so this cover's a "too bright" raster issue, but the "red push" would be caused by soemthing else right? As you said
| Mac wrote: |
Its could be a shorted drive xsistor on the crt card or at the output of the jungle ic. Could also be the tube. Short on gun similar to projector tube problem with one tube emitting all the time. |
For this I can just grab a meter and test the drive transtor on the neck card? How would I tell if it's the jungle IC? |
Well your red push could be brightness related also, just that the red is more predominant then the green or blue. I would first go into the menu and see if your at 6500k. If its at 5000k it will have a reddish tint. I would then go into the expert menu and see if the bias and gain could correct this. If no go try doing a factory reset by holding the reset button for more the 2 seconds.
If none of this works you can either try the mod or start searching for a problem. If you try the mod and still have to much red then its time to dive in and see what is causing the problem.
The transistors are actually on the RGB board, not on the crt card for that monitor. Just off ic406 and ic404. IC404 could be considered the jungle ic but in a monitor its not really called that but preforms similarly. If I preformed the above and still and still had to much red I would first want to verify the pic tube or not. Again I'm not seeing what your seing so I'm assuming its like a red brightness. I would locate the ribbon cable to the crt card, id the wire for red, then for blue, clip each and reconnect to the opposite and see if it remained red or went to heavy blue. Similar to swapping video wires in a projector. If it was still red then its the tube. If it went blue then its in the circuitry. If its in the circuitry, then you can start testing xsistors and what not.
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