WG6100 moved it to another game and it worked.

smpoponi

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So I have had this Space Duel sitting for a few years that I bought dead. I had some free time so I decided to start rebuilding the monitor. I did the full BR repair kit to it and still was getting spot killer and just a white dot on the screen. I was able to coin up and heard what sounded like the game playing.

After trouble shooting it a bunch and rechecking my work to no avail I decided to move the monitor over to my Tempest cocktail and BOOM its works 100%.

In the space duel I tried playing with the game PCBs vert and hoz out but no change. Occasionally the spot killer will go out or flicker but then I get the dot and a few stray lines but nothing else. Oh and R107 is super hot, dont know if thats normal.

What is my next move? What in the cab besides the game board could be the issue? I will totally send out the PCB for repair but I figured I should exhaust all my possible problems 1st.

Thanks
 
Check the pots for x-y on the space duel pcb.. Had an issue with broken pots on my tempest, so the monitor didn't work.. Replaced them, boom! It works
 
This is where an oscilloscope would come in handy. You can probe the vector outputs at a few different locations on the board and see what they look like on screen. AVG chip could be suspect as mentioned. Sometimes the op amps that amplify the xy output signals on these atari vectors go bad too..
 
Your right!

But most of us, well at least me.. Doesn't have a scope nor do I know how to use one.. So, before investing $$$ and time try the basic fixes first.

Or, jump right into being a pcb tech :)

Man I'd love a scope and some room in my brain to learn.

This is where an oscilloscope would come in handy. You can probe the vector outputs at a few different locations on the board and see what they look like on screen. AVG chip could be suspect as mentioned. Sometimes the op amps that amplify the xy output signals on these atari vectors go bad too..
 
No AVG on a Tempest board BTW so no way to swap one. Don't get too deep into trying to repair a vector board. You will probably have a hard time finding some of the parts. Yes, by all means try the easy stuff like POTs etc. but if you don't know what you are doing, the board repair guys get a little upset because they have to fix your "fixes".

If you can't determine what the problem is before fixing it, don't go shotgunning the board.

Just some friendly advice.
 
Your right!

But most of us, well at least me.. Doesn't have a scope nor do I know how to use one.. So, before investing $$$ and time try the basic fixes first.

Or, jump right into being a pcb tech :)

Man I'd love a scope and some room in my brain to learn.

Pete, I could get you up and running on a scope for vector display troubleshooting in about five minutes. Connect x in, connect y in, set up a trigger and you are good to go. A good tek scope (analog) can be had on the cheap these days.
 
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Andrew
 
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