Re: Weird G05 Problem, Please Help

Hi Jon!

Check the voltages on the game board at the test points. It might be bad
edge connections (Atari is notorious for that problem) on the card edge
connection. If you put it in self test do you get any "beeps" and if so how
many? Do you have the manual? (spies.com) and follow the self test section.
I would unplug the monitor until you get proper game sounds again, as the
monitor might get an illegal vector and blow an output.

John :-#)#

At 08:33 AM 7/26/99 -0400, you wrote:
>Well, I was able to get the monitor up this weekend.. Since I'm not the
>most electrically inclined, I don't know exactly what all of my (monitor)
>problems were. I think it comes down to faulty new parts. At some point,
>the two Y chasis transistors failed (one of them shorted causing the
>frying R613 and R618). Also, as it turns out, 2 of my TIS 98 transistors
>that I bought from Bob Roberts were leaking some (installed at Q602 and
>Q603). The result was that there was 17vdc added to the Y input, which
>meant 35v was going through the fuse F600, instead of the 17v at F700.

***
I would tell Bob about this, he might have bad stock. Give him any
identifying marks on the transistors, if there is a date code(unlikely) so
much the better.

>Well, here's the bad news... As soon as I first saw a picture on the
>screen, I was so happy. I stopped to play a couple games (its an
>Asteroids Deluxe), and was ready to close it back up and return it to the
>wall. After I put the back door on and rotated it around, the game board
>died :( It now draws some stuff on the screen (letters and numbers,
>ships, etc) and then just freaks out and draws some random vectors. Then
>it trips the watchdog and resets. In test mode, it only shows a
>horizontal line, then it resets. I threw in another non-working board
>that comes up in test mode, so the monitor itself is still good. Any
>ideas? I want to check out the power supply to make sure it is still
>happy, but I think it probably is.
>
>Anyway, thanks Rodger and John for the ideas.. And especially my brother
>Rob for walking me through fixing this thing (even though I only got a
>couple games in before it broke again).
>
>Jon

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Received on Mon Jul 26 23:33:16 1999