RE: Tempest boards playing blind (and worse)...help!

bj!

Thanks everybody, for your suggestions. I'll start digging into these
boards probably on Sunday, when I might actually have some free time again.
(!)

Richard

-----Original Message-----
From: owner-vectorlist@synthcom.com
[mailto:owner-vectorlist@synthcom.com]On Behalf Of Travis Shire
Sent: Monday, January 06, 2003 7:56 PM
To: vectorlist@synthcom.com
Subject: Re: VECTOR: Tempest boards playing blind (and worse)...help!

VoSsy VoS!!!

With the one drawing crazy lines I'd start with the dac's, one or the other
(or both for that matter) is probably bad. The one with no video kicking the
spot killer should be a bad op amp in the output section. Check with a meter
on each axis' test loop to see if its stuck (they should normally fluctuate
as the pix is drawn).
Follow the schem to see where you get a good input to an op amp stage and a
stuck output.

Shouldn't be much of a problem to get them both back in action again.

Laterz
Travis

Hey guys, I was unconverting my MH last night to sell as a Tempest...got one
of my dead Tempest boards going and popped it in.  Machine is working
great.  Figured while I was at it, I should try to get some others going. 
I've got two sets that play fine blind, but no video (spot killer on)...have
another that plays blind, but draws a few crazy random vectors, with the
spot killer going on and off rapidly.  Monitor sounds like hell during this,
so I only ran it a few seconds.

Any suggestions on where to start?  This is the first time I've delved into
anything more than bad solder joints at the interconnect, as far as Tempest
boards go.

Thanks,
Richard

--
__________________________________________________________
Sign-up for your own FREE Personalized E-mail at Mail.com
http://www.mail.com/?sr=signup
Meet Singles
http://corp.mail.com/lavalife
---------------------------------------------------------------------------
** To UNSUBSCRIBE from vectorlist, send a message with "UNSUBSCRIBE" in the
** message body to vectorlist-request@synthcom.com. Please direct other
** questions, comments, or problems to vectorlist-owner@synthcom.com.
---------------------------------------------------------------------------
** To UNSUBSCRIBE from vectorlist, send a message with "UNSUBSCRIBE" in the
** message body to vectorlist-request@synthcom.com. Please direct other
** questions, comments, or problems to vectorlist-owner@synthcom.com.