IBM 5151 (MDA display) - common faults / gotchas?
swtpc6800 at comcast.net
Sun Nov 9 11:20:52 CST 2014
I also lost a 5151 monitor to a program crash, it was "Gone in Sixty
Seconds" or less. I replaced it with a third party monitor that had the
advertised feature of not burning up due to lost sync.
From: cctalk [mailto:cctalk-bounces at classiccmp.org] On Behalf Of Chuck Guzis
Sent: Sunday, November 09, 2014 8:44 AM
To: General at classiccmp.org; Discussion at classiccmp.org:On-Topic and Off-Topic
Subject: Re: IBM 5151 (MDA display) - common faults / gotchas?
I'll add this to the 5151 issue. Because the 5151 responds to *every*
horizontal sync pulse, it's quite possible to toast the flyback transformer
with the wrong frequency. I know--I've done it.
Contrast with a simple astable multivibrator which would simply lose synch .
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