On corrupt texts using P5 limitation the psis may be incorrectly motorized.
If the SN and the psi cut-out switches are in the active position, then each time
SS is shown the psi settings are increase by one. Several versions for ??? (Note: illegible) and
psi settings can be printed: by "snaking" through these the clear text can be
found. In practice it was done better by hand.
(f) Chi, Mu, Psi cut-out switches.
These switches (on the control box) cut out a set of wheels completely,
including their effect in the total motor.
Cutting out Psi produces de-chi, which may be checked against that provided