Re: Hardware Diagnostics Tests on a Star Wars board, how does it work?

Thanks Joe, I have tried it reversed :( still no go. It's one of those
weird things where I'm sure it looks ok, but it's not working even on a good board!
I've tried both switch sets, with patterns reversed also, and checked the switch
on/off positions with a meter too.
There must be something weird or undocumented that I have messed up...
I get flashing LED's and no number in the centre of the screen...

Cheers,
Marc

----- Original Message -----
From: "Joe Bachmann" <joe.bachmann@newmail.net>
To: <vectorlist@synthcom.com>
Sent: Thursday, April 04, 2002 11:27 AM
Subject: Re: VECTOR: Hardware Diagnostics Tests on a Star Wars board, how does it work?

> Try this oppisite of the way you are doing now. You probably have Off/On mistaken. (I've done this myself so many times I lost
> count)
>
> Once you have it in the right position, a number should display in the center of the screen. ie 15 for test 15.
>
> JB
>
> Marc Alexander wrote:
>
> > I'm repairing a Star Wars board set that has Matrix Errors in the
> > normal self test (amongst other now repaired faults), and I can't
> > seem to get the 'Hardware Diagnostics Tests' via DIP switches working
> > properly via the option switches and grounding of the DIAGN test point.
> >
> > I am setting the option switches (SW2 at 10D) correctly to the requested
> > tests 15-20 by the normal self test error screen, and all I get is the
> > 3 LED's flashing continuously (manual says this is 'unimplemented position')
> > and no test number shown on the display either (which is a CRO in XY at the moment)
> >
> > I have tried this on a good working board also, and it does the same thing so I
> > figure I must be doing something wrong or unexpected to get these test working properly.
> > I've tried the switch positions reversed, and even the other switches SW3 at 10E just in case.
> >
> > The manual says(and I am doing):
> > 1. Set the Self-Test switch to the on (up) position. (I assume this means Self Test input to GND?)
> > 2. Ground the DIAGN test point on the Main PCB.
> > 3. Set the option switches as indicated in the test procedure and momentarily ground the RESET test point on the Main PCB.
> > If an unimplemented switch position is selected, LED 1, 2, and 3 on the Main PCB will all flash on and off about
> > once per second.
> > Also, the display will show the number of the test for Hardware Diagnostic Tests 10 through 26 (if
> > the AVG PCB and display are working).
> >
> > BTW, the problem on the faulty board is no stars or ships in gameplay, picture & music hangs
> > once death star is shown, but can still fire and see shots (I assume matrix errors are hanging it up)
> > When in normal self test, matrix errors listed correspond with tests 15 to 20 in the
> > Troubleshooting manual.
> > Problem is on the Main PCB (Rev A), RAM's are OK, Vector PROM's are ok, asst. other IC's so far
> > tested in the Matrix section are ok, but not done them all yet.
> >
> > Arrrgghh, what am I doing wrong? ;-)
> >
> > Thanks very much,
> >
> > Marc
> >
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Received on Wed Apr 3 17:59:41 2002