HP-97 keyboard problem

[Paul Berger (Canada)]

Well most of the keys you mention are in the same column, what about DSP, A, B, D, E, RCL and f? also in the same column. If all the keys in a column don't work they are driven by the PIK chip the divide key seems to be in a different column, but in the row with CHS - and FIX, the rows are driven by the cathode driver, and if one of them is bad you should be missing a digit in the display as well. If some but not all in a column do not function I would look for a broken connection on the keyboard.The service guide, available on the MoHPC documentation memory stick, shows a grid of the keyboard wiring.

Paul.