Re: Re[2]: TECH: Tempest +5v line

my tempest the voltage +5v adjust pot would go open and put 7.5v
on the 5v supply not good but it just kill the ram pokeys and the leds on
the encoder
but thats just what i think??

----- Original Message -----
From: "peter jones" <highwayman2000@mail.ru>
To: <vectorlist@vectorlist.org>
Sent: Monday, June 07, 2004 1:48 PM
Subject: Re[2]: VECTOR: TECH: Tempest +5v line

>
> -----Original Message-----
> From: "James Bright" <james@quarterarcade.com>
> To: <vectorlist@vectorlist.org>
> Date: Sun, 6 Jun 2004 19:48:04 -0400
> Subject: RE: VECTOR: TECH: Tempest +5v line
>
> >
> >
> > It is what is it. "Atari's Audio Regulator II board uses +SENSE and
> > -SENSE to help regulate voltage on the power supply. Unfortunately, bad
> > connections can sometimes cause invalid return values and affect voltage
> > reading."
> >
> > Bad connections at the edge connections, or connectors that get dirty
> > over time, cause increased resistance. The ARII board tries to
> > compensate (using the + and - SENSE lines) and supplies more voltage.
> > This can lead to burn out of R29 (I've actually witnessed this happen in
> > a game that was working moments before). I am sure I've seen a more
> > detailed explanation before, but I just wrote down what I needed for my
> > notes. Simply removing this feedback helps prevent the burnt edge
> > connector. At worst, you might (eventually) have a lower +5V line. But
> > what you're really doing is avoiding burning up R29 and the melting the
> > edge connector.
> >
> > JB
> >
>
> unless your very unlucky,
>
> the 5v and ground signals use multiple contacts, the feedback doesnt.
> if you get bad connections on the feedback the voltage will rise way above
5v.
>
> --------------------------------------------------------------------------
-
> ** Unsubscribe, subscribe, or view the archives at
http://www.vectorlist.org
> ** Please direct other questions, comments, or problems to
chris@westnet.com
>

---------------------------------------------------------------------------
** Unsubscribe, subscribe, or view the archives at http://www.vectorlist.org
** Please direct other questions, comments, or problems to chris@westnet.com
Received on Sun Jun 6 23:37:27 2004