UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Non-working Commodore PET 3016

ortek_service · 10th Apr 2021, 7:53 pm

It had looked like on his video that the main PCB just had a row of complete pins, so looked like it was possible to mis-align it. But maybe they changed the design a bit (seems there were several keyboard, with different connections)

If all the keys that don't work are in one row / column, then it could well be an issue with the scanning not being correct (all shifted to right) rather than the keys themselves.
(Anyone who's had the joys of Spectrum & ZX81 keyboard membranes, will know how easily the silver-paint on the ribbon tails fractured, loosing a line of 5 keys or one from each of the 8 lines)

10th Apr 2021, 7:53 pm	#1516
ortek_service Octode Join Date: May 2018 Location: Northampton, Northamptonshire, UK. Posts: 1,444	Re: Non-working Commodore PET 3016 It had looked like on his video that the main PCB just had a row of complete pins, so looked like it was possible to mis-align it. But maybe they changed the design a bit (seems there were several keyboard, with different connections) If all the keys that don't work are in one row / column, then it could well be an issue with the scanning not being correct (all shifted to right) rather than the keys themselves. (Anyone who's had the joys of Spectrum & ZX81 keyboard membranes, will know how easily the silver-paint on the ribbon tails fractured, loosing a line of 5 keys or one from each of the 8 lines)