Path: utzoo!utgpu!water!watmath!clyde!att!pacbell!ames!pasteur!ucbvax!phast.phys.washington.EDU!SEYMOUR
From: SEYMOUR@phast.phys.washington.EDU
Newsgroups: comp.os.vms
Subject: re: vt240 repairs
Message-ID: <8806261958.AA17229@ucbvax.Berkeley.EDU>
Date: 22 Jun 88 02:17:00 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 11

we haven't done a REAL DEC vt240, but we have replaced the NVR
(non-volatile ram: either a battery-backed static ram chip or an
Electrically Eraseable Read Only Memory or a "shadow ROM" (unlikely))
in an Ergo 100.  in any terminal i've taklen apart, the NVR chips are
usually in a socket (sometimes they're the ONLY chip in a socket).
the replacement chips are usually less than $5.
they are usually recognizable by having some discrete components
(such as a single transistor and a few resistors in a uniquely messy
layout) nearby (generating the erase/rewrite voltages).
-- dick seymour
seymour@uwaphast.bitnet