Troubleshooting - HEIDENHAIN iTNC 530 Service Manual

21.3 Troubleshooting

The soft-key rows of the BF screens are connected with the keypad board of the TE via ribbon
VDU soft keys
cable.
Troubleshooting --> See "Checking the Keys" on page 22 – 363.
Proposal for troubleshooting, if the screen remains black when the machine is switched on:
Monitor
21 – 356
Machine is switched on
but screen remains black
Check whether the fan works. Measure if there are
24 V at the 2-pin connector of the screen.
Is a direct
current of 24 V
available?
Shut down the control and switch off the machine.
Label all cables and disconnect all connectors from the
iTNC 530 (exception: monitor connector X49/X149, power
connector X69, 5 V supply terminal).
Also remove USB devices and data cables.
Press the EMERGENCY STOP button and
switch on the machine again.
Is now an
image visible?
Connect your service laptop to the iTNC 530 and start the
HEIDENHAIN computer software TNCremoNT.
Set up a connection and click one of the
camera symbols in the menu bar.
Is now image information
available on the laptop?
The graphics card of the iTNC 530 is probably okay.
No
Yes
Yes
No
No
Yes
HEIDENHAIN Service Manual iTNC 530
Establish power supply.
A defective unit impairs the
control such that the monitor
does not function properly.
The graphics card of the
iTNC 530 may be defective!?