Re: LA 50's showing age

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#652

From: John R. Dudeck
Date: Thu, 27 Sep 1990 04:02

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In an article imp@marvin.Solbourne.COM (Warner Losh) wrote:
>
>I'm having a problem with my LA50.  No matter what I do I can't get it
>to work with my rainbow.  It doesn't do flow control.  From a breakout
>box I don't see any characters coming back from the printer.  Anybody
>know how to fix the output drivers?

I had this problem, and traced it down to the DC-DC converter module
which is supposed to convert +5 to +/- 12 for the RS232 driver chip.
I scavenged another converter, but that only lasted a few months.
Finally I built a DC-DC converter from an experimenter's kit sale from
Jameco Electronics (the kit is discontinued now), and it has been
working for years.

-- 
John Dudeck                                  "Nothing is foolproof, because
jdudeck@Polyslo.CalPoly.Edu                        fools are so ingenious."
ESL: 62013975 Tel: 805-545-9549                       -- quote from PC Mag.

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Message-ID: <270179e0.4619@petunia.CalPoly.EDU>

Path: arc1-ca.pugleaf.net!utzoo!attcan!uunet!snorkelwacker!apple!bionet!ucselx!petunia!news

References: <1990Sep26.051842.8764@Solbourne.COM>

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Path: arc1-ca.pugleaf.net!utzoo!attcan!uunet!snorkelwacker!apple!bionet!ucselx!petunia!news
From: jdudeck@polyslo.CalPoly.EDU (John R. Dudeck)
Newsgroups: comp.sys.dec.micro
Subject: Re: LA 50's showing age
Message-ID: <270179e0.4619@petunia.CalPoly.EDU>
Date: 27 Sep 90 04:02:40 GMT
References: <1990Sep26.051842.8764@Solbourne.COM>
Organization: Cal Poly State Univ,CSC Dept,San Luis Obispo,CA 93407
Lines: 20

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