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Friden EC-130 Service Manual, September 1, 1965

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Friden EC-130 Service Manual (September, 1965)

This is the official Service Manual for the Friden EC-130 Electronic Calculator. It goes into great deal of how the logic of the machine functions, down to the gate and flip-flop level. The document is intended to be used in conjunction with the EC-130 Computer Printout, which provides information about the location of the various gates and flip flops, down to the component level, on the circuit boards. This manual outlines the four counter (early version, up to Serial #8500) EC-130 calculator. As yet, I have not come across a similar manual for the more common three-counter version of the EC-130.

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