23 Apr
2004
23 Apr
'04
7:49 a.m.
Does anyone have any experience reviving dead VT52 DecScopes?
I'm getting a couple in unknown condition. One "lights up" and the other
one doesn't.
I haven't seen them yet. I've found good diagnostic info on vt100.net
I'll see what happens when I put them in offline mode and run some tests.
Ashley
23 Apr
23 Apr
7:59 a.m.
I have also just located the 144 page VT52 maintenance manual.
- Ashley
----- Original Message -----
From: "Ashley Carder" <wacarder(a)usit.net>
To: "General Discussion: On-Topic and Off-Topic Posts"
<cctalk(a)classiccmp.org>
Sent: Friday, April 23, 2004 3:49 PM
Subject: VT52 question
Does anyone have any experience reviving dead VT52 DecScopes?
I'm getting a couple in unknown condition. One "lights up" and the other
one doesn't.
I haven't seen them yet. I've found good diagnostic info on vt100.net
I'll see what happens when I put them in offline mode and run some tests.
Ashley
8:56 a.m.
Does anyone have any experience reviving dead VT52 DecScopes?
I'm getting a couple in unknown condition. One "lights up" and the =
other one doesn't.
From what I remmeebr the VT52 logic is somewhat strange
-- it's
essentially a simple special-purpose processor with a simple data path
and microcode in a set of PROMs to control it all. The PSU and monitor
circuitry is more conventional.
I have the prints (are they on bitsavers too?). I would start by checking
the PSU rails, then if they're OK, look for sync and video outputs from
the logic. That will at least tell you whether you have a logic or
monitor problem.
-tony
7548
days inactive
7548
days old
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ard＠p850ug1.demon.co.uk -
wacarder＠usit.net