HP-65 card reader - purpose of WE pin

[albertofenini]

Hi Tony
This is an HP65 so you don’t get any error message
With the switch in W/PRGM the card goes thru
The waves WA and WB look clean and ok and the display is steady like everything was ok
But if you try to read the card just written you get a blinking display
I’ll check the switches and report here

We have another unit that has a noisy WB and doesn’t write as described in a
different thread but this is the first time that with good waves the card is not written

We have of course tried a bunch if new cards and not just one

Any suggestion is welcome ! Thx in advance