Isaac-1
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There is a certain tendency to see failures in some types of components sooner than in others, thankfully though there is no real troubling ones on these boards, as a rule of thumb capacitors will be the first to fail on most electronic devices where there is not a design flaw, however the military used tantalum capacitors instead of conventional electrolytic capacitors which do not suffer nearly as much from age related failure. Having said that the most common point of failure on these boards tends to be the transistors, their failure is often caused by shutting down the generator without first removing the connected load as they simply burn out while the AVR goes to full output trying to maintain voltage as the engine slows down. I suspect the couple of diodes in test procedure are there because they tend to fail with the transistors, one being the final output protection diode and the other being closely related to the 2 transistors in the control circuit.
Ike
p.s. does anyone have a list of the specs for the CR5 and CR6 diodes on this board, or do I need to go out and look up the color banding codes? (well CR5 anyway, CR6 should be easy enough)
Ike
p.s. does anyone have a list of the specs for the CR5 and CR6 diodes on this board, or do I need to go out and look up the color banding codes? (well CR5 anyway, CR6 should be easy enough)
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