Visual Display Units; Checking The Bc 120F Visual Display Unit - HEIDENHAIN iTNC 530 Service Manual

11 Visual Display Units

11.1 Checking the BC 120F Visual Display Unit

Fault diagnosis If the machine is switched on, but the screen remains black:

Is the fan running?
 Check the 24 V voltage at the 2-pin connector of the visual display unit.
If another BF 120 is available:

Test the VDU output X49 with this monitor.
If you have a dimensionally identical control:
 Test the BF 120 with this control.
July 2002
Note
If the power supply is in order, then a further inspection of the flat-panel display is not
possible without special test equipment.
Note
If required you can display the control monitor by means of the programs TNCremo,
TNCremoNT or TeleService.
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