Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems.

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Old July 23rd 03, 06:18 AM
Steve Reinis
 
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Default Sony Trinitron Contrast Issue

The monitor in question is manufactured by Sony and is a Trinitron display,
but it's branded as a Dell UltraScan 1000HS. I bought it used for $40 and
it was a steal as far as I'm concerned because it's been working flawlessly
for months now.

The CRT seems to still have great emissions, but the firmware is really
limiting it's full potential. Let me explain why.

First off, everything is adjusted through on-screen menus. In addition to
the standard controls for brightness and Contrast, there is a single button
to the left with a "box" type icon above it. Pressing this button once
gives you "Standard Mode." While in Standard mode, you get a nice setting
of contrast and brightness for everyday use without being so bright that it
strains your eyes. The contrast/brightness controls have normal effects on
the display. Press this button again and you will be in "Presentation
Mode." In Presentation mode, you get SUPER Contrast, but the brightness
seems unaffected. Press the button once more and you end up in
"Graphics/Video Mode." You again have super contrast, but you also get a
SUPER sharp picture. It actually blurs text, but video and graphics are
super vibrant and very clear.

Now when it standard mode, the contrast needs to be set at 100% or else
there isn't enough contrast for my taste. I keep brightness at about 47%.
Obviously the contrast is being limited by firmware because when in
"Presentation mode," there is an abundance of contrast and you end up with a
very bright picture.

So I've gotten into the habit of just hitting the mode button and switching
to Presentation mode. However, the monitor defaults back to standard mode
whenever you change resolution or the monitor goes to sleep and is later
awakened.

Can I change the "default" setting in the service menu? Or by any other
method?

Thanks,
-Steve



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