Arcade Collecting > Miscellaneous Arcade Talk

How to start finding board and monitor problems?

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unclet:
I obtained a free Space Encounters cabinet recently which had some problems.

RayB:
Photos. I don't think anyone here knows off the top of their head what the inside your your cab looks like.

That said, when you measure the power voltages, you'll find out if perhaps THOSE are the cause of the garbled graphics. RAM can "fail" when there isn't enough voltage to power them up. Which means fixing the voltage level fixes the RAM error too.

Now if the voltages are all correct, then you're closer to RAM being actually bad, but again it can also be bad connections somewhere, or a chip not sitting properly in a socket.

APFelon:
Sounds like you need a manual!  ;D

http://www.arcadedocs.com/vidmanuals/S/SpaceEncounters.pdf

Can you read schematics? Most everything is there is you know how to read it.

Good luck, and I hope this is a good start for you!

APf

paigeoliver:
I am going from memory here, but I seem to remember Space Encounters being a Midway 8080 class, in that case the power supply is nice and labeled and easy to check the voltages on. Also means that any of the guys who fix space invaders boards can fix that one.

ShinAce:
I just started skimming throught that schematic and within 2 seconds found something good.

If you've opened the door, and left it open, the machine will not turn on. Either close the door, or find the switch the door activates.

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