What would cause a Defender to randomly reset?

nanoryan

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Plays perfect. Just rebuilt the power supply with one of Bob's kits (minus the transistor). Every now and then it randomly resets. Any suggestions? I don't have any backup batteries in it currently, could that be it?

Thanks for any suggestions, Ryan
 
You might also want to switch you meter to AC and test the voltages being output. I have found that as little as 0.3 VAC will cause the memory to react badly causing a reset.

That can be a symptom of the 18,000mfd cap going bad as well as the filter diodes.

ken
 
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