MK2/9 defective Axis repair need help on schematics

[4u2fast]

Hi,

can anyone help and answer me the question below ?

there are 10 x 74HC14 (U1-U10) on board and i have x axis and some output channels defective due operator fault ...
i need to know which chip is responsible for what output.

thanks

Thomas

Similar Threads:

• Heidenhain TNC 145 Measuring System Defective X Axis, What next
• Need Help!- Interact 4 series 2 - X Axis system defective
• Roboform 400 with c axis 128 amp schematics needed!
• Schematics/Circuit Diagram for 3 Axis Driver with Parallel Port Interphase

[franmar34571515]

U3 E U4 step U4 PIN 6 dir PIN 8 U3