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I had no idea Bob had those, hmmm, now I might try saving some of my Kortek
junkers. Should really check his site more thoroughly...
The 160V is for the screen drive, it should be filtered with a capacitor -
typical value of 10ufd/200VDC, and you want a low ESR cap there and any
caps on the output side of the Flyback transformer. Failure here will cause
loading on the flyback and hopefully pop the fuse before the flyback dies.
Economies of scale, plus video game monitors tend to be better built (US
made ones at least) as they are expected to run 24/7.
John :-#)#
At 08:25 AM 10/17/01, you wrote:
>I found a manual scan here...
>
>http://www.hypertech.com/arcade/monitors.asp
>
>And Bob Roberts has replacement Kortek flybacks for $25. One monitor was
>marked "bad flyback" when I got it and after plugging it in to test it
>out, I believe it.
>
>As a general monitor question, the 160 volts comes out of the flyback and
>then through the circuit? So if a component was bad, it would on the fuse
>side away from the flyback, correct?
>
>Lastly, does anyone know why arcade monitors are so expensive? I new 19"
>TV is $120 from Best Buy. Yet a new 19" arcade monitor with no housing,
>no tuner and no remote is $185 or so. Is it just economies of scale? Or
>a captive market?
>
>-Werner
>
>At 08:04 AM 10/17/2001 -0700, you wrote:
>>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:
>>>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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>
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Received on Wed Oct 17 09:51:10 2001
This archive was generated by hypermail 2.1.8 : Tue Dec 02 2003 - 17:51:27 EST