I have a problem with keyboard of maho with 432 CNC controller.
Really I have 2 turning machines
The first MAHO GR 400 CNC Philips 432.
The second MAHO GR 200 with as CNC Philips 432.
Because of an unknown problem these two machines was never put into service they are in the state of delivery from factory in 1991.
So I decide to put them into service.
1- I have start by changing the batteries back to 23 years, to introduce constant machines.
2- when I start up machine at first sight I see the CNC keyboard does not work well (all key give erroneous values like the following)
If I press 7 it gives 5
If I press 2 it gives 9
DATA in / out = 6
10 = 0
F5 = →
4 = 7
→ = F3
Prog mem = 3

And so the following ...
3- I change the card in the CNC that the keyboard cable is connected in, but it didnt give anything
4- I’m not sure, I think that the constant machine do this, but I can not enter them because the keyboard gives erroneous values.
I have the same problem with two machines
Please help and thank you