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Author Topic: HP 4191A Impedance Analyzer - E50 Error (psu repaired)  (Read 7893 times)

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Offline coppercone2Topic starter

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Re: HP 4191A Impedance Analyzer - E50 Error (psu repaired)
« Reply #75 on: February 22, 2026, 06:50:36 pm »
in mine, there are 12 rom slots. 10 are populated. 11 has a socket but nothing in it. 12 has no socket just a footprint

what are they for?  the options?
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Offline m k

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Re: HP 4191A Impedance Analyzer - E50 Error (psu repaired)
« Reply #76 on: February 22, 2026, 08:45:30 pm »
No idea, but since there is a socket somebody must have had.
Option is a good guess.
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