Asteroids help...

augusthansen

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Its a pretty decent shape Asteroids cab and Im not getting anything on the monitor except an LED on the chassis board, and no sound except some light crackling. The PCB has the LED lit. Any ideas?
 

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Maybe it's me, but I don't see the crystal on that board. Take a picture between Section A3-A7 to confirm it is there. Position A5 to be exact.
 
Looks like you are also missing a pot. One of the X Y pots, I do not remember which one you have either X or the Y, buit the other does not look to be present. Both are on the same side of the PCB as the connector edge, opposite end from it.

There is also a resistor mod recommended to be done to the deflection board you have. Search for it and you'll find it.
 
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Be careful with this board - i'd get it working before I'd plug my monitor in. The analog section at the top of the board needs some love. I'd clean all the legs and reseat all of the socketed ics then replace the missing crystal, pot, and 4016 then see if it plays blind before plugging in my monitor. If you have a scope you can check the x and y outputs.

Bill
 
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