HEIDENHAIN ND 1300 OED and Crosshair Systems - Manual (Page 238)

220 QC-300 Series User’s Guide
Symptoms, probable causes and solutions
Some common symptoms of problems are listed in the following pages with probable causes and possible
solutions.
No image is visible on the LCD screen
Probable cause 1: Power is not applied to the QC-300
Possible solutions:
1 Activate the main power source.
2 Connect the power cord or turn the power ON.
3 Replace the fuse.
Probable cause 2: LCD ON/OFF toggle switch is in the OFF mode
Possible solution:
1 Press the LCD ON/OFF button to toggle the LCD ON.
Probable cause 3: LCD contrast or backlighting is out of adjustment
Possible solution:
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
Probable cause 1: The axis encoder is not connected or is
malfunctioning
Possible solutions:
1 Connect the axis encoder cable firmly to the QC-300.
2 Replace the axis encoder.
Probable cause 2: The Encoders setup screen specifies the
wrong axis encoder resolution
Possible solution:
1 Specify the correct resolution in the Encoders setup screen.
Probable cause 3: The wrong axis encoder count polarity is
specified in the Encoders setup screen
Possible solution:
1 Specify the correct count polarity in the Encoders setup screen.