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Re: Mitsubishi Diamond Plus 200 insufficient blue
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Sjouke Burry
Feb 2, 2011, 8:45:30 PM2/2/11
to
kpgp...@kpgpbhdw.com wrote:
> I just got an old 22" Mitsubishi Diamond Plus 200 CRT monitor.
> The previous owner said that the picture was "greenish".
> He didn't say anything else about it.
>
> The problem is that the blue color is about one tenth as bright as it
> sould be, which means the colors look greenish-browning, unless I set
> the red and green gains down to where I can barely see the image in a
> normally lit room.
>
> Of course, I tried to set the blue gain to the max setting, but it is
> still one tenth as bright as it should be, by my estimation.
>
> I opened the unit up and looked inside. It is fairly free of dust.
> The parts of it that I could see without taking it completely apart
> didn't show any visible defects such as burned parts, loose connectors,
> broken wires, scorch marks, et cetera.
>
> Aside from the dim blues, the unit works just fine, and I would like to
> take a shot at fixing it.
>
> Does anyone have any suggestions for what I should check first, second,
> third, and so on?
>
> Thanks to all of you.
>
> Graviton.
One thing which sometimes helps, reflow all connections on the board
plugged onto the tube.
> I just got an old 22" Mitsubishi Diamond Plus 200 CRT monitor.
> The previous owner said that the picture was "greenish".
> He didn't say anything else about it.
>
> The problem is that the blue color is about one tenth as bright as it
> sould be, which means the colors look greenish-browning, unless I set
> the red and green gains down to where I can barely see the image in a
> normally lit room.
>
> Of course, I tried to set the blue gain to the max setting, but it is
> still one tenth as bright as it should be, by my estimation.
>
> I opened the unit up and looked inside. It is fairly free of dust.
> The parts of it that I could see without taking it completely apart
> didn't show any visible defects such as burned parts, loose connectors,
> broken wires, scorch marks, et cetera.
>
> Aside from the dim blues, the unit works just fine, and I would like to
> take a shot at fixing it.
>
> Does anyone have any suggestions for what I should check first, second,
> third, and so on?
>
> Thanks to all of you.
>
> Graviton.
One thing which sometimes helps, reflow all connections on the board
plugged onto the tube.
N_Cook
Feb 3, 2011, 3:49:51 AM2/3/11
to
<kpgp...@kpgpbhdw.com> wrote in message
news:iicrn7$is5$1...@news.eternal-september.org...
> I just got an old 22" Mitsubishi Diamond Plus 200 CRT monitor.
> The previous owner said that the picture was "greenish".
> He didn't say anything else about it.
>
> The problem is that the blue color is about one tenth as bright as it
> sould be, which means the colors look greenish-browning, unless I set
> the red and green gains down to where I can barely see the image in a
> normally lit room.
>
> Of course, I tried to set the blue gain to the max setting, but it is
> still one tenth as bright as it should be, by my estimation.
>
> I opened the unit up and looked inside. It is fairly free of dust.
> The parts of it that I could see without taking it completely apart
> didn't show any visible defects such as burned parts, loose connectors,
> broken wires, scorch marks, et cetera.
>
> Aside from the dim blues, the unit works just fine, and I would like to
> take a shot at fixing it.
>
> Does anyone have any suggestions for what I should check first, second,
> third, and so on?
>
> Thanks to all of you.
>
> Graviton.
news:iicrn7$is5$1...@news.eternal-september.org...
> I just got an old 22" Mitsubishi Diamond Plus 200 CRT monitor.
> The previous owner said that the picture was "greenish".
> He didn't say anything else about it.
>
> The problem is that the blue color is about one tenth as bright as it
> sould be, which means the colors look greenish-browning, unless I set
> the red and green gains down to where I can barely see the image in a
> normally lit room.
>
> Of course, I tried to set the blue gain to the max setting, but it is
> still one tenth as bright as it should be, by my estimation.
>
> I opened the unit up and looked inside. It is fairly free of dust.
> The parts of it that I could see without taking it completely apart
> didn't show any visible defects such as burned parts, loose connectors,
> broken wires, scorch marks, et cetera.
>
> Aside from the dim blues, the unit works just fine, and I would like to
> take a shot at fixing it.
>
> Does anyone have any suggestions for what I should check first, second,
> third, and so on?
>
> Thanks to all of you.
>
> Graviton.
Try swapping red and blue drive lines. Isolates to the final or earlier
stages
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whit3rd
Feb 5, 2011, 6:09:03 PM2/5/11
to
On Feb 2, 4:09 pm, kpgpb...@kpgpbhdw.com wrote:
> I just got an old 22" Mitsubishi Diamond Plus 200 CRT monitor.
> The previous owner said that the picture was "greenish".
> He didn't say anything else about it.
>
> The problem is that the blue color is about one tenth as bright as it
> should be> I just got an old 22" Mitsubishi Diamond Plus 200 CRT monitor.
> The previous owner said that the picture was "greenish".
> He didn't say anything else about it.
>
> The problem is that the blue color is about one tenth as bright as it
Well, I'd start with centering the blue control, maybe the red and
green
too, then readjust the high voltage "screen" or "G2". You need a
grey-bars
test signal to readjust the color (first diddle the RGB offsets, to
get
the darkest bar neutral gray, then change the RGB gains to make
the lightest bar neutral).
Some monitors do a lot of this through software, but removing the case
back and poking in with small adjustment screwdrivers is the usual
procedure. Beware the high voltage (anode) wire; your adjustments
have to be made with power ON.
Message has been deleted
Sitre Josephenne Magana
Mar 9, 2011, 10:09:42 AM3/9/11
to
kpgp...@kpgpbhdw.com wrote:
> I just got an old 22" Mitsubishi Diamond Plus 200 CRT monitor.
> The previous owner said that the picture was "greenish".
> He didn't say anything else about it.
>
> The problem is that the blue color is about one tenth as bright as it
> I just got an old 22" Mitsubishi Diamond Plus 200 CRT monitor.
> The previous owner said that the picture was "greenish".
> He didn't say anything else about it.
>
> The problem is that the blue color is about one tenth as bright as it
> sould be, which means the colors look greenish-browning, unless I set
> the red and green gains down to where I can barely see the image in a
> normally lit room.
>
> Of course, I tried to set the blue gain to the max setting, but it is
> still one tenth as bright as it should be, by my estimation.
>
> I opened the unit up and looked inside. It is fairly free of dust.
> The parts of it that I could see without taking it completely apart
> didn't show any visible defects such as burned parts, loose connectors,
> broken wires, scorch marks, et cetera.
>
> Aside from the dim blues, the unit works just fine, and I would like to
> take a shot at fixing it.
>
> Does anyone have any suggestions for what I should check first, second,
> third, and so on?
>
> Thanks to all of you.
>
> Graviton.
It means that the software driver for the blue electron gun needs to be> the red and green gains down to where I can barely see the image in a
> normally lit room.
>
> Of course, I tried to set the blue gain to the max setting, but it is
> still one tenth as bright as it should be, by my estimation.
>
> I opened the unit up and looked inside. It is fairly free of dust.
> The parts of it that I could see without taking it completely apart
> didn't show any visible defects such as burned parts, loose connectors,
> broken wires, scorch marks, et cetera.
>
> Aside from the dim blues, the unit works just fine, and I would like to
> take a shot at fixing it.
>
> Does anyone have any suggestions for what I should check first, second,
> third, and so on?
>
> Thanks to all of you.
>
> Graviton.
updated.
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