HEIDENHAIN ITNC 530 - Possible Causes of Error

22 – 362 HEIDENHAIN Service Manual iTNC 530
TE 535 Q
22.3 Possible Causes of Error
 Strong contramination --> Key functions are possibly damaged.
 Jammed chips. --> Key gets stuck.
 Pressure contact defective. --> Key no longer reports actuation.
 Liquid has penetrated
 Defective keypad board
 Defective cable between screen and keypad (screen softkeys)
 Defective cable between keypad and control
 Potentiometer wiper worn
 Defective touchpad
 Defective interface on the control
Note
Defective keys either do not contact any more or are in permanent contact.