Article View: sci.electronics
Article #6474Comp monitor high voltage out (& Re: Computer monitor)
From: Rick Stuart
Date: Thu, 27 Aug 1992 17:46
Date: Thu, 27 Aug 1992 17:46
40 lines
2188 bytes
2188 bytes
In article <ssomaroo.714255819@unpcs1> ssomaroo@unpcs1.cs.unp.ac.za
(Shyamal Somaroo) writes:
>I used to own a Commodore 128 computer and had a monitor for it.
>Now I use the monitor as a television screen and wonder if it
>is possible for me to use it with my CGA card since I have a black
>and white screen at the moment.
Sounds like your Commodore monitor accepts composite signals, the CGA
card produces RGB signals. To turn RGB into composite, you need to
build a modulator (Trivial if you have the parts and know-how, other
wise not worth it, *I* think.) Besides, used CGA monitors should run
less than $100.
>Also if it is possible could I use it with a VGA card and if so
>how do I do it?
If you are using it as a TV monitor, it runs at about 15kHz. VGA monitors
run at about 35kHz. Trying to run your Commodore monitor at this speed
might shorten it's life to a few moments!
______________________
On to *my* question...
I have a Teknika CGA/EGA/PGA (almost VGA) multisync monitor (MJ-503).
The other night the high voltage died (or so I assume). What advice do
*you* have for me. I'm looking for feed-back like...
"Capacitors sitting between the fly-back primary and the power
transistor oscillator are the first to go."
...or....
"Have you examined the case of the conversion diode between the
fly-back and anode of the picture tube?"
If the feed back is good, I'll collect and post them!
...thanks, Rick Stuart
Lisle, IL
Technical Details
Message-ID:
<1992Aug27.174644.1074@tellab5.tellabs.com>Path:
arc1-ca.pugleaf.net!sparky!uunet!dtix!darwin.sura.net!sgiblab!cs.uoregon.edu!ogicse!das-news.harvard.edu!spdcc!dirtydog.ima.isc.com!newsserver.pixel.kodak.com!laidbak!tellab5!stuartShow Full Headers
Complete Article Headers
Path: arc1-ca.pugleaf.net!sparky!uunet!dtix!darwin.sura.net!sgiblab!cs.uoregon.edu!ogicse!das-news.harvard.edu!spdcc!dirtydog.ima.isc.com!newsserver.pixel.kodak.com!laidbak!tellab5!stuart From: stuart@tellabs.com (Rick Stuart) Newsgroups: sci.electronics Subject: Comp monitor high voltage out (& Re: Computer monitor) Keywords: monitor high voltage computer Message-ID: <1992Aug27.174644.1074@tellab5.tellabs.com> Date: 27 Aug 92 17:46:44 GMT Sender: news@tellab5.tellabs.com (News) Distribution: usa Organization: Tellabs, Inc., IL Lines: 40 Originator: stuart@sunc19 Nntp-Posting-Host: sunc19