RE: NEED SOME HELP with a DEAD STAR WARS BOARDSET....

Joe,(or anyone willing to help with my ongoing Issue)
****

 Hi, again, well still no go, (Same Issues)
and at this point I have replaced every single I.C.
with exception to the one (do not recall what the Part Number is)
but the I.C. which hangs off the Power On Reset CKT
and which connects directly to the RESET Pin located
Next to the GND PIN in the following Configuration
and near the edge of the MAIN Board (See Below for Detail)

   
    GND---I I---RST

 
 In any case, and at this time, I am totally lost as
even with the CPU Removed, I noticed the the IRQ Line
is Always LOW (PIN 3) on the 6809 CPU and replacing the
I.C. (do not recall Part Number) to which this IRQ Line ties to
and which should not be low, has not helped any at all.

 Also noted that even with the CPU Out of the Socket
not only is the IRQ Line Constatly LOW, PIN 37 -- RST
will Constantly Pulse (HIGH / LOW / HIGH, etc...)

 In addition and GNDing the RST PIN and or the WDDIS PIN
while it immediately Stops the CPU from Pulsing (PIN 37)
and causes it to go Constant HIGH, there is still No
Change to the issue and the 3 LED's which I believe should
Extinguish once RESET Completed, on this MAIN BOARD never go out,
(Always Stay Lit) no matter what I do.

 I also Verified All the ROMS for Integrity and Checked All Checksums,
as well as Replaced the On Board Memory Chips with No Change.

  Also I am hoping that there might be someone out there whom knows
what might cause the IRQ Line to Stay Constantly LOW ???

 Arcadius........... :-)

-----Original Message-----
From: Stempak Arcadius-ASTEMPA1
Sent: Thursday, September 26, 2002 11:15 PM
To: 'vectorlist@synthcom.com'
Cc: Stempak Arcadius-ASTEMPA1
Subject: RE: VECTOR: NEED SOME HELP with a DEAD STAR WARS BOARDSET....

Joe,
****

 Thanks again, appreciate the input and advice.

 Will keep you all posted.....

Arcadius......... :-)

-----Original Message-----
From: Joe Bachmann [mailto:joe.bachmann@newmail.net]
Sent: Thursday, September 26, 2002 11:02 PM
To: vectorlist@synthcom.com
Subject: Re: VECTOR: NEED SOME HELP with a DEAD STAR WARS BOARDSET....

If you grabbed the schematics , print out page 7A. Once you can figure out
why
your watch dog circuit is going nuts you should be ok. Perhaps the 74ls74 at
6R?
just a guess.

The watchdog related stuff is on the left side of the page. The whole left
side
of 7A is interconnected, keep in mind.

JB

Stempak Arcadius-ASTEMPA1 wrote:

> Joe,
> ^^^^
>
> Well I checked All of the Parts which you had
> previously Suggested Checking and which again were:::
>
> ===============================================================
>
> A quick look at page 7A of the schematics shows me this:
>
> Reset comes from pin 6 of 6R. This is also pin V on the main board
connector
> and
> pin 12 of 6E. (this is all Watchdog circuit stuff so far.) Also we have
pin
> 1 on
> 3R (Interrupt Timer.)
>
> So, if this is staying Low, check for a pulse at pin 5 of 2R (pin 3 of
6R.)
> Chances are there's no pulse. 6E is an AND gate so, with a pulse from 6R,
it
> should pulse too.
>
> If no pulse at 6R, check pin 2 of 6R.
>
> So, someone correct me if I am wrong.
>
> JB
>
> ===============================================================
>
> However and in every instance, of the above Chips / Pins
> rather than get No Pulse, I, in every instance, noted that
> Each Pin Produces a Pulse (Very Rapid HIGH / LOW / HIGH / LOW Pulse)
>
> Also and at this time if I GND the WDDIS PIN, the RST LINE on my
> CPU Goes HIGH rather than Very Rapid HIGH / LOW / HIGH, etc...
>
> However and even with the RST LINE HIGH or not HIGH, does not matter,
> the IRQ Line on Pin 3 of the CPU if I recall correctly, is Always LOW.
>
> I traced this IRQ Line to a 7474 Type CHIP and even replaced this Part
> but to no avail, IRQ is still Low.
>
> Does anyone have any other Ideas ???
>
>
>
> Arcadius............. :-)
>
> -----Original Message-----
> From: Stempak Arcadius-ASTEMPA1
> Sent: Wednesday, September 25, 2002 4:03 PM
> To: 'vectorlist@synthcom.com'
> Cc: Stempak Arcadius-ASTEMPA1
> Subject: RE: VECTOR: NEED SOME HELP with a DEAD STAR WARS BOARDSET....
>
> Joe,
> ^^^^
>
> Thank you and You Are the MAN.....
>
> Here is the latest in my Endeavor to repair this MAIN BOARD.
>
> Last night, did some additional checking and part swaps
> Swapped out several parts and at this time the NMI, FIRQ Lines
> are HIGH, also the RST (Pin 37) now instead of being a Constant LOW
> Pulses very quickly between HIGH and LOW Continuously.
>
> Now if I GND the WDDIS Pin the RST LINE then goes HIGH and stays that
> way until I remove the GND, but the Board will not come out of RESET
> STATE (All RED LED's on Board are Constantly ON)
>
> Also what I can not get to go HIGH is the IRQ LINE, on the CPU
> which stays a Constant LOW and which, from what I have read
> should not be Constant LOW...
>
> Appreciate your input........
>
> Arcadius........... :-)
>
> -----Original Message-----
> From: Joe Bachmann [mailto:joe.bachmann@newmail.net]
> Sent: Wednesday, September 25, 2002 12:11 AM
> To: vectorlist@synthcom.com
> Subject: Re: VECTOR: NEED SOME HELP with a DEAD STAR WARS BOARDSET....
>
> A quick look at page 7A of the schematics shows me this:
>
> Reset comes from pin 6 of 6R. This is also pin V on the main board
connector
> and
> pin 12 of 6E. (this is all Watchdog circuit stuff so far.) Also we have
pin
> 1 on
> 3R (Interrupt Timer.)
>
> So, if this is staying Low, check for a pulse at pin 5 of 2R (pin 3 of
6R.)
> Chances are there's no pulse. 6E is an AND gate so, with a pulse from 6R,
it
> should pulse too.
>
> If no pulse at 6R, check pin 2 of 6R.
>
> So, someone correct me if I am wrong.
>
> JB
>
> Stempak Arcadius-ASTEMPA1 wrote:
>
> > Joel,
> > ^^^^^
> >
> > Great idea, but unfortunately I already
> > tried this with no change to the problem.
> >
> > In fact I also replaced the CPU, and noted
> > that the RESET LINE (RST) is still LOW.
> >
> > It must be something before the CPU (PIN#37)
> > holding the RESET CKT LOW, but I have yet
> > for the life of me, to figure out what that is.
> >
> > Arcadius.......... :-)
> >
> > -----Original Message-----
> > From: Joel Rosenzweig [mailto:joel.rosenzweig@verizon.net]
> > Sent: Tuesday, September 24, 2002 7:11 PM
> > To: vectorlist@synthcom.com
> > Subject: Re: VECTOR: NEED SOME HELP with a DEAD STAR WARS BOARDSET....
> >
> > Try liftting the reset pin on the 6809, tie it high, and see if you
make
> > any further progress
> >
> > Joel-
> >
> > ----- Original Message -----
> > From: "Stempak Arcadius-ASTEMPA1" <ASTEMPA1@motorola.com>
> > To: <vectorlist@synthcom.com>
> > Cc: "Stempak Arcadius-ASTEMPA1" <ASTEMPA1@motorola.com>
> > Sent: Tuesday, September 24, 2002 4:48 PM
> > Subject: RE: VECTOR: NEED SOME HELP with a DEAD STAR WARS BOARDSET....
> >
> > > Anthony,
> > > *******
> > >
> > > I attempted to Trace back from the RESET CKT
> > > and indeed at the point where the GND and RESET
> > > POINTS on the Board are present the RESET PIN is
> > > Stuck LOW all the time.
> > >
> > > Does anyone, or yourself, know what IC's
> > > actually make up the RESET CKT Going back up
> > > to the 6809 CPU ???
> > >
> > > O.K. a lot to ask for but thought I would ask
> > > just the same.
> > >
> > >
> > > Arcadius....... :-)
> > >
> > > -----Original Message-----
> > > From: Anthony Ramos [mailto:aramos@ele-mental.org]
> > > Sent: Tuesday, September 24, 2002 12:56 PM
> > > To: vectorlist@synthcom.com
> > > Subject: Re: VECTOR: NEED SOME HELP with a DEAD STAR WARS BOARDSET....
> > >
> > >
> > > Right. A correctly functioning watchdog circuit only *pulses*
> > > the RESET line, then watches again, and pulses again, if
> > > necessary. On a bad board with a good watchdog, it does
> > > this: ~~~~~_~~~~~_~~~~~_~~~~~_~~~~~ etc.
> > >
> > > RESET stuck low is almost certainly due to a bad watchdog
> > > circuit. If you don't have schematics, or you can't read them,
> > > maybe someone here can help.
> > >
> > > By they way, have you made sure the reset *button* isn't "stuck
> > > low"? ;-)
> > >
> > > -aramos
> > >
> > > On Monday, September 23, 2002, at 09:30 PM, Stempak
> > > Arcadius-ASTEMPA1 wrote:
> > >
> > > > So question is, since the RST on the CPU on this STAR WARS MAIN is
> > > > Always Stuck LOW, and from what I read should Only go LOW when
> > > > the Board is
> > > > actually RESET.
> > > -
> > > Anthony Ramos -- aramos@ele-mental.org / aramos@hyperreal.org
> > > phone: 503.236.6303 / mobile: 503.267.3519
> > > 600 Southeast 39th Avenue #3, Portland, Oregon 97214 USA
> > >
> > >
> --------------------------------------------------------------------------
> > -
> > > ** 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.
> >
> >
>
---------------------------------------------------------------------------
> > ** 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.
>
>
---------------------------------------------------------------------------
> ** 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.

---------------------------------------------------------------------------
** 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.
Received on Fri Sep 27 15:29:28 2002