HEIDENHAIN TNC 415 (259 9x0) Service Manual - Manual (Page 79)

SERVICE MANUAL TNC 415B/425
Page 74
Issue: 20.08.95
BC 110, Id.No. 254 740 01
If the screen remains dark when the machine is switched on, first check the power supply (line voltage) of the
VDU. The control signals for the screen can only be checked with an oscilloscope.
The following diagrams were generated with the VISUAL DISPLAY UNIT connected. Depending on machine
parameters and image depicted, the colour signals R-analog, Y-analog and B-analog may differ from those on
page 75.
X43 Visual Display Unit (BC 110)
flange socket with female insert (15-pin)
Pin No. Assignment
1, 8, 11 GND
2 to 6, 12, 13 do not assign
7 R signal
9 V SYNC
10 H SYNC
14 Y signal
15 B signal
Diagrams
V-SYNC PIN 9 H-SYNC PIN 10
2V/DIV 2V/DIV
10 ms/DIV 20 µs/DIV