Rasterlist Archives: Re: TECH: Kortek Videomaster monitor failur

From: John Robertson <jrr_at_flippers.com>
Date: Wed Oct 17 2001 - 08:04:32 EDT

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I have some schematics of these monitors (and other odd-ball ones from the 70's). Unfortunately the common problem is the flyback shorts out. I have no spares of these. We usually drop in an Electrohome monitor when these Korteks die... 
We do sell a LOPT/Flyback test meter kit and a capacitor ESR meter kit for servicing monitors, check our site for more info on these @ www.flippers.com 
John :-#)# 
At 07:48 AM 10/17/01, you wrote: 
<blockquote type=cite class=cite cite>I did some searching for Kortek schematics a while back and found a site in Australia that had a lot of information about the monitors.  You may want to search the net to find this site so you could ask the guy who runs it.  As it turns out, the schematics I was looking for were not available online, so Kortek actually emailed a vector drawing of it for us.  So you might even ask the source if they can offer any help.  Maybe they have a flow diagram you could use. 
Jon 
At 10:28 AM 10/17/2001 -0400, you wrote: 
>I have two of these (both a 13" and a 19") that have bad monitor boards. I 
>have just started looking at them and they both have blown fuses (F602). 
>Has anyone worked on a lot of these monitors? Is there a specific component 
>that dies most of the time? What would cause F602 to blow? It looks to me 
>that it's used on the 160 volt circuit. The 160v comes out of the flyback 
>so I should be looking for a shorted component on the side of the fuse away 
>from the flyback, right? 
> 
>Thanks for any suggestions. 
> 
>Werner Sharp 
>sharpw@bellsouth.net 
> 
> 
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Received on Wed Oct 17 08:04:32 2001

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Re: TECH: Kortek Videomaster monitor failures