HEIDENHAIN TNC 306 Service Manual - Manual (Page 45)

SERVICE MANUAL TNC 306/360
Page 41
HEIDENHAIN Service
9.2.3 Checking the Potentiometers
Procedure:
Connect the measuring adaptor to connector X23 of the LE. Now the wiper voltages of the
potentiometers can be measured with a multimeter.
Potentiometer PIN Voltage Range
Override F% 37 = 0V / 35 = + pot. (0 ... approx. 4.95)V
Spindle S% 37 = 0V / 34 = + pot. (0 ... approx. 4.95)V
9.2.4 Measuring Setup: Checking the Potentiometers
X23
Test Adaptor
2.50V
Multimeter
keyboard unit
I128 to I143 for
machine operating
panel
*
Attention!
Always switch off the main switch before engaging or disengaging any
connectors.