[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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