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8080 board

On the schematic, RP3 is listed as 4.7K, on the parts list include in the Jair Manual, rev-3 build instruction, its also a 4.7k, but in the
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Build Notes and Bill-of-materials - REV 4
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with photos of the parts, its listed as a 47K...

Looks to me like its not an issue, but you may want to clean this up...

​also, a good replacement for the 7805 or 7805C, is the ST L4940-5, 1.5amp LDO regulator, its a newer part, regulator better with smaller caps.

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Tom Lafleur