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HP41C s/n 1932A00199
10-20-2020, 11:51 PM (This post was last modified: 10-20-2020 11:52 PM by Diego Diaz.)
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RE: HP41C s/n 1932A00199
Hi,

This is caused by the different display boards. Early units used a timer for the auto-OFF feature with a different capacitor (C2) value than those in the latter units.

You have to replace that capacitor in the CPU board, from 470pF to 10nF and you'll get the standard auto-OFF delay.

Hope this helps.

Best from Canary Islands.

Diego.

"Do not suppose, check it twice."
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RE: HP41C s/n 1932A00199 - Diego Diaz - 10-20-2020 11:51 PM



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