21" Monitor problem: Poor brightness. Dell D1626HT/ Sony GDM-500 chassis
Lionel:
You cannot "fix" or "tweak" a weak CRT. In it's previous life, it was probably left on 24/7 ..... this is most likely why you were able to pick it up for "cheap" at a market. A CRT rejuvenator like a B&K or Sencor MIGHT be able to eek some more life and brightness out of it. Best Regards, Daniel Sofie Electronics Supply & Repair ------------------------------------ snipped: "Lionel" wrote in message I just picked up one of these beautiful 21" monitors cheap at a market. Except for this brightness problem, it works perfectly. I'm driving it Turning up all the on-screen bias & gain controls to the maximum values produces a usable, but still darkish image. I was assuming that as the monitor is about 4 years old, it'd probably just need a cleanup, & for me to tweak up the EHT, but having obtained a schematic, I now know that there are *no* internal adjustments at all! I Any tips or ideas? |
21" Monitor problem: Poor brightness. Dell D1626HT/ Sony GDM-500 chassis
I have seen CRT's go weak where there was a lot of brightness loss,
and yet the pictures were still sharp. I think it is how the tube deteriates that indicates how it will look. Most of the time, they do go soft, but not always. Jerry Greenberg -- Lionel wrote in message ... On Thu, 7 Aug 2003 07:17:14 -0700, in , "Sofie" said: Lionel: You cannot "fix" or "tweak" a weak CRT. In it's previous life, it was probably left on 24/7 ..... this is most likely why you were able to pick it up for "cheap" at a market. A CRT rejuvenator like a B&K or Sencor MIGHT be able to eek some more life and brightness out of it. Any time I've looked at monitors with worn out CRTs, they've usually had weak contrast, & a general 'murky' look. This one has a razor sharp, very clean image, apart from the lack in brightness. (It was running when I bought it, & I wouldn't have bothered if it'd had a bad looking image.) It's worth mentioning that this beast has a digital diags port that's accessible via a hatch on the rear cover, & that the service guide says you're supposed to use some sort of proprietory device to do the initial convergence (etc) setup on it. My guess is that you need it to access all the adjustments that are normally done with trimmers, etc. |
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