The Museum of HP Calculators
HP Forum Archive 21
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|PCB pictures of a HP10B, HP20S or HP21S?|
Message #1 Posted by Christoph Giesselink on 17 Dec 2012, 3:12 p.m.
I'm looking for pictures of both sides of the PCB from a HP10B or HP20S or HP21S calculator (Low Range Pioneer with LU7 Bert chip). I expect that all 3 calculator use the same PCB so IMHO it doesn't matter from which one the pictures are.
|Re: PCB pictures of a HP10B, HP20S or HP21S?|
Message #2 Posted by Randy on 17 Dec 2012, 10:19 p.m.,
in response to message #1 by Christoph Giesselink
There were different boards.
First is a 20S (1LU7-0303), Serial 3125S...
Later, they changed the packaging which IIRC matched the 12C chip package. That version is a 10B (1LU7-0006), Serial ID922...
Neither board shown has any plate-throughs. Earlier versions used tab packages with the typical HP gold plate double sided plate throughs, same as the early Pioneer 17/27/42S type.
If you want the full size images, shoot me a message, they are too big to post with the user account here.
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