strange HP-97A

[Katie Wasserman]

(08-08-2016 02:59 PM)BobVA Wrote:  HP Collector, if you have occasion to open it up again, or a picture from a slightly different angle, could you check to see if there's a connection to pin 16?

I pulled out the main PCB from a donor 97 that I had around and traced it out. The service manual PCB labeling of the LED segments is entirely different than what I have on my PCB, the pins are correct but the mapping from pin number to segment is permuted for many of the segments. I suspect that there are different PCB board versions to accommodate the various iterations of the ROMs.

I stick to my guess as to what's going on and the the service manual is wrong for the board shown above.