HEIDENHAIN ND 1400 - Manual (Page 160)

146 QC-300 Series User’s Guide
Symptoms, possible causes and solutions
Some common symptoms of problems are listed in the following pages with possible causes and solu-
tions.
No image is visible on the LCD screen
Possible cause Possible solutions
Power is not applied to the QC-330 1 Activate the main power source
2 Connect the power cord or turn the power ON
3 Replace the fuse
LCD ON/OFF toggle switch is in the OFF mode 1 Press the LCD ON/OFF button to
toggle the LCD ON
LCD contrast or backlighting is out of adjustment
1 Readjust the backlighting using
the decimal point or +/- key
2 Adjust the brightness level in the
Miscellaneous setup screen
Values displayed on the LCD screen are incorrect
Possible cause Possible solutions
The axis encoder is not connected/malfunctioning 1 Connect the axis encoder cable firmly
2 Replace the axis encoder
Wrong axis encoder resolution 1 Specify the correct resolution in the
Encoders setup screen
Wrong axis encoder count polarity 1 Specify the correct count polarity in the
Encoders setup screen
Wrong axis encoder 1 Connect the axis encoder specified in the
Encoders setup screen
2 Confirm that the each encoder is connected
to the correct axis input
Wrong encoder type specified 1 Correct the encoder specification in the
(Analog vs TTL) Encoders setup screen