HP-82104A Card Reader Repair Questions

[teenix]

(01-13-2023 04:16 AM)matty_K Wrote:  Thank you for the reference to your notes. I had read the portion on repairing the pinch roller, but I hadn’t looked further to see the portions on waveforms.

Regarding the cover (and just to make sure I understand), how does one lift the rear of the cover to clear the lugs without having any surface to lever against? What is your preferred tool/method? One slip and you’ve bent the pins going up to the switch board or damaged the components just under the edge of the cover.

A small enough flat bladed screwdriver sideways, fits between the pins and rests on the bottom of the casing.

Levering it gently downwards forces the end of the blade to push up against the top cover. Two screwdrivers would be better with someone holding the reader and pushing the cover forward.

cheers

Tony