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HP25C repair, help needed
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01-19-2019, 06:09 PM
(This post was last modified: 03-05-2019 06:50 PM by AndiGer.)
Post: #21
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RE: HP25C repair, help needed
The parts on my HP-25C board look just as yours but single density chips. I only have the board. Got it together with a HP-21 board which looks like your HP-25 board as I look at the parts.
Didn't get it to work yet but didn't try very hard. Didn't measure voltages. Thought maybe there are differences as it is an older version as I guess due to 1820-1630 chips. So not of help for me and you. |
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