Fixing a DEC Letterwriter (LA100) - test-drb@ccmp.vtda.org

16 Jun 2008

---------ORIGINAL MESSAGE:

Date: Mon, 16 Jun 2008 22:23:39 +0200
From: "Steve Maddison" <steve at cosam.org>
Subject: Re: Fixing a DEC Letterwriter (LA100)

2008/6/16 M H Stein <dm561 at torfree.net>:
...
  Various patterns of DSR and POWER/FAULT flashing are
the diagnostic
 failure codes; what pattern do you have that is not documented?

 Defective RAM is 8 flashes BTW. 
Yep, I figured that one out the long way. I only have some user docs
so this wasn't listed, just things like "out of paper" and "cover
open". I'm now back to the original CTS and ONLINE combination (no
flashing).

--------REPLY:

POWER/FAULT not flashing should indicate that it has passed POST; 
DSR means what you'd think, that DSR is active.
Looks like it thinks everything's OK.

1 to 9 flashes indicate faults with ROMS 1 to 7 & normal/extended RAM.
Steady flash, no bell: open cover or paper fault.
Steady flash w/bell: head jam or servo motor/encoder

m