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From: GTHEALL@PENNDRLS.UPENN.EDU (George A. Theall)
Newsgroups: comp.sys.dec.micro
Subject: Rainbow EchoMail Digest
Message-ID: <9006281525.AA18839@remote.dccs.upenn.edu>
Date: 28 Jun 90 16:27:00 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 117

Rainbow EchoMail Digest                         Jun 28, 1990

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


  Articles posted to either INFO-DEC-MICRO or comp.sys.dec.micro are
currently gatewayed to the Rainbow Echo on FidoNet. You do not need
to take special action to respond to articles in these digests.

  Please send reports of problems or suggestions for improvement of
this digest to GTHEALL@PENNDRLS.UPENN.EDU (Internet).
------------------------------------------------------------------------
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)

------------------------------
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)
------------------------------