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Any HP-25c schematics?
08-31-2018, 01:14 PM
Post: #1
Any HP-25c schematics?
Hello everyone,

I've bought a "cheap" but heavily blue-white-green corroded HP-25c and washed and cleaned it. It was so damaged that in the wash process I almost lost a component; this the "big" black transistor on the left of the first (mid) RAM chip (thank you, Harald!):

[Image: 25chrrvg.png]

Now, I have to test it (and every component I guess) and to solder it (or a new one) on the board again. But where does it connect onto the board? I didn't find any picture or schematic neither in this site, nor on the PPC DVD of Jack Schwartz.

Any help will be appreciated.
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Messages In This Thread
Any HP-25c schematics? - Archilog - 08-31-2018 01:14 PM
RE: Any HP-25c schematics? - Leviset - 08-31-2018, 01:53 PM
RE: Any HP-25c schematics? - SlideRule - 08-31-2018, 07:53 PM
RE: Any HP-25c schematics? - [kby] - 06-17-2019, 06:14 PM
RE: Any HP-25c schematics? - Archilog - 08-31-2018, 03:08 PM
RE: Any HP-25c schematics? - AndiGer - 08-31-2018, 05:21 PM
RE: Any HP-25c schematics? - Thomas Klemm - 09-01-2018, 04:17 AM
RE: Any HP-25c schematics? - AndiGer - 06-17-2019, 06:40 PM
RE: Any HP-25c schematics? - [kby] - 06-17-2019, 07:12 PM



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