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Posted by Pat Horridge on 11/16/05 09:58
The things I'd check are:
Correct termination and assuming Video cable ok.
Wind the colour right off on the monitor and ensure the blacks are black and
the whites are white (Bias and gain adjusts via menu or internal tweaks)
When you have a good mono picture you can check on brightness and contrast.
For brightness I prefer to use a Pluge signal (that has sub black, black and
slightly over black bars) this allows you to set the monitor for the correct
black level.
To test is the tube is shot. Feed a signal with black and a white box that
is appox 1/3 the screen area in the centre.
Start with the contrast right down and then increase if the tube is duff you
will see a blooming to the right of one the colours (or more) If this
happens before the white has reached a level you think is acceptable for
white then the tube is not up to the job (they can be "re-juvinated" I've
done it my self but it's only a stop gap)
If the tubes ok then set the contrast to the point just before no increase
in white level is seen whilst turning it up.
Then re-check the black level in case it has changed.
Then make sure the geometry is ok if you have access to those controls.
Finally wind the colour up as before and check your colours are ok. If they
are wrong it's either the source or there's a decoder/matrix error on the
monitor.
As always don't be tempted to poke around inside if you aren't experienced.
Being dead just isn't worth the saving.
"Steve Guidry" <steveguidry@earthlink.net> wrote in message
news:y_9df.8054$AS6.3466@newsread3.news.atl.earthlink.net...
> there may be a number of possible explanations. Here are the two that
> come
> to mind :
>
> 1) The monitor may not be terminated properly. That could easily cause
> the
> bleeding on the 100% white bar.
>
> 2) The monitor may already be worn out. If you get ghosting on the
> highlights of a properly set up monitor, then the CRT is probably toast.
>
> Of course, your video may actually look that bad, only you never knew it
> because your monitor was "adjusted" to make it look OK.
>
> Steve
>
>
>
> "ALR" <resnickventures@hotmail.com> wrote in message
> news:1131731605.665317.89150@g49g2000cwa.googlegroups.com...
>> My broadcast monitor produces horrible output after calibration.
>> Details:
>>
>> -I've successfully implemented the instructions from
>> http://www.synthetic-ap.com/tips/calibrate.pdf (bars match on blue
>> only, blacks adjusted etc). Used SMPTE bars from Premiere Pro 1.5
>> -The output to the monitor looks terrible now that it's "calibrated."
>> Way too much green.
>> -Also, there is some yellow bleeding into the left margin of the white
>> bar on the lower left, both before and after calibration.
>>
>> I bought the monitor used. I have a budget for some service if needed.
>> It is a JVC BM-H1300SU. Thanks much for any advice, ALR
>>
>
>
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