[time-nuts] HP5372A CPU schematics
Mark Sims
holrum at hotmail.com
Wed Dec 29 21:40:26 UTC 2010
I bought some spare 5372A CPU boards. One of them failed the histogram hardware test. Looking at the histogram/timing board schematic, the only histogram specific chips on the CPU board seemed to be a decoder and a couple of buffers. I replaced the decoder and the problem got worse with several more tests now failing.
The ROMs are 5372-80032 .. 80039
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