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Old 12th Sep 2017, 7:50 pm   #10
G0HZU_JMR
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Join Date: Sep 2010
Location: Cheltenham, Gloucestershire, UK.
Posts: 3,077
Default Re: Help with 6802 Microcontroller

I had a quick skim over the circuit looking for components that might age and fail and my first question would be about 1uF caps C10, C11. What kind of caps are these and are they in good health? These caps look to be part of a level shift/detect circuit associated with a couple of JK flip flops that connect to the reset line.

Is C25 in the monostable circuit OK? (4.7uF) C25 is next to the MC6821 PIA chip.
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