+- HP Forums (https://archived.hpcalc.org/museumforum)
+-- Forum: HP Museum Forums (https://archived.hpcalc.org/museumforum/forum-1.html)
+--- Forum: Old HP Forum Archives (https://archived.hpcalc.org/museumforum/forum-2.html)
+--- Thread: PCB pictures of a HP10B, HP20S or HP21S? (/thread-236226.html)
PCB pictures of a HP10B, HP20S or HP21S? - Christoph Giesselink - 12-17-2012
Hi,
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.
Christoph
Re: PCB pictures of a HP10B, HP20S or HP21S? - Randy - 12-17-2012
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.
