HP-65 more on the card reader

[albertofenini]

Dear Geoff, Hello everyone,

we were able to fix the worm gear of one motor, but nothing changed,
We also worked on two more units, with the same result.
They read 100% of the cards, even the cards recorded on a different HP-65 but none of them
can record a card.

More over, this two units have a bizarre behavior,
The first one, when reading shows a strange combination of 000 on the display, but when the card
is extracted it goes back to a normal 0.00, and the card has been read properly.
It can be seen here : https://youtu.be/TrJnuXr1H1o

The other unit, reads fine, but when recording the motor spins endlessly until the card is removed.
Hover, it doesn't record anything.
It can be seen here : https://youtu.be/NugramtopJI

Since four different units behave like this, it has to be a common mistake that we make
when restoring the card reader.

My feeling is that the write enable switch doesn't work on all of them.

How can we override this switch ?
Is there a why to force this condition ?
We have found on the schematics the pin, I believe is WE (write enable) but how can we force
this ? Should we ground this pin ? Or should we put a voltage there ?

We would like to override this just to see if we will be able to write on a card.

Thanks for help !!!