🚀 go-pugleaf

Rainbow EchoMail Digest                         Jun 28, 1990

In this issue:
  RE: CODE BLUE AND 100A
  RB100A FOR SALE
  LA-50


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Date:     06-26-90 (08:27)
To:       FRANK MALLORY
Subject:  RE: CODE BLUE AND 100A
From:     DAVID STRICKLER

In a message of <31 May 90  07:54:44>, Frank Mallory (1:109/123) writes:
 FM>The moderator will jump on me if I mention the names of any  vendors
 FM>here; but if you put the question to me on this BBS, I will be glad to
 FM>furnish it.

No I won't... At this point, RB owners need all the info they can get... :)


David Strickler
Sysop of 101/45
Midnight DEC (Boston)
(617)739-0708 [Voice]

- --- msged 1.99S ZTC
 * Origin: Midnight DEC  (1:101/45)

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Date:     06-26-90 (16:47)
To:       ALL
Subject:  RB100A FOR SALE
From:     DAVID HARDY

Greetings, folks...

        First $600.00 (firm) takes RB100A w/256k, DEC color monitor,
        GOLD kybd, DF-112 modem, LA-50 printer, spare monochrome
        monitor, extra memory chips, assorted software including
        CPM-86/80, MS-DOS, SAMNA WORD II & III, DBASE-III, TK!/Solver,
        MBASIC-86, Pascal MT+, & Ryan-McFarland RM/COBOL.  Also, all
        manuals, diskettes, & cables.

        Call Dave at (508) 795-0905 after 17:00 or days using our
        answering machine.  Or drop a line here...

        All hardware & software is in current working order and I
        will deliver to point in southern New England.

        Pkg must go in one fell swoop:  need $ for grad school and
        room for megatonnage of books, journals, & papers...

        Thanks for your consideration...


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 * Origin: Midnight DEC - The BBS for DEC sales & information (Opus

------------------------------
Date:     06-27-90 (10:37)
To:       ANDREW TAYLOR
Subject:  LA-50
From:     TOM KEMNITZ

Andrew,
         I also tried changing the capacitor, with no luck.  I think
 you will find that the DC-DC converter is bad.  It provides the +12
 and -12 volts DC that the printer uses to communicate with the
 computer.  If you have a multimeter it is a simple matter to test it.

         1) Flip the LA-50 over on to it's back with the switches on
 the front facing you.  With the bottom panel removed, use a ruler to
 locate the converter.  The mounting pin is located 4 3/16" from the
 left edge of the board and 11/32" from the top (rear of LA-50).
 You should see a single pin sitting by itself.  You are interested
 in the 4 pins below it.

 |<-------------4 3/16-------------->   11/32 ^
 |                                   o        v
 |
 |                             o   o   o   o
 |                            /    |   |    \
 |                           /     |   |     \
 |                         -12    +12 +5    GND


         2) Hook up the cables to the LA-50 and check to see if you
 get the proper voltages.  If so, the problem is elseware.  If not,
 now comes the fun part.  I found it impossible to find a direct
 replacement that would mount to the board where the old one came off.
 I settled for another brand and soldered short leads on it to make
 the connection.  Not very pretty but it has worked for about 6 months
 without any problem.

         If you want to try to find a direct replacement, mine was a
 FUJIKEN, part# A12C10AC.  If not, you should be able to find one at a
 large electronic supply house.  Get one that is made for powering
 RS-232 ports with a +5 volt input and +12 and -12 volt outputs.
 A friend found mine in a junk bin where he works.

         If you have any questions, leave me a message and I will try
 to help.

                                         Tom


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 * Origin: WayStar BBS (Opus 1:322/14)
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