Column electric components
70
4990851_002_00 – 2082262 – 2022-01-10
10.5 Main Controller Unit
Attention: the Main Controller Unit assembly requires a serial
number. Observe Chapter 1.9 when replacing the Main Controller
Unit.
Removal 1. Prepare the operating table (Chapter 5).
2. Disconnect the power supply on the operating table
(Chapter 6.1).
3. Release the bellows [1] from the column cover [2] (1 screw [3]
on both the left and the right below the bellows).
4. Loosen the bellows from the guide column (both the inner
screws [4] below the bellows at the head and foot end).
5. Note the mounting position of the flat conductor. Pull the
bellows upwards and unplug the flat conductor of the column
keypad from the main board (Main Controller Unit).
The flat conductor is clamped to the plug. First push the small
pins at the edge of the plug downwards and then pull the
cable out of the plug.
6. Unscrew the column cover from the frame.
Attention - the column cover will slide down as soon as all the
screws have been removed.
Remove 2 screws [5] from the head and foot of the column
cover [2].
7. Guide the column cover [2] downwards and place on the
running gear.
8. Remove 2 cable clips [6] above the Main Controller Unit [8] (1
screw each [7]).
9. Note the cable routing. Remove the cable fastenings on the
Main Controller Unit [8].
10. Note the cable routing. Remove all protective conductors
from the main board (Main Controller Unit).
11. Note the cable routing. Disconnect all cables from the main
board (Main Controller Unit).
12. Remove the Main Controller Unit [8] (3 screws [9]).
Assembly 1. Mount the Main Controller Unit (3 screws).
2. Attention: Do not interchange the plug connections. Pay
attention to the wiring diagram on page 64.
Restore the original cable routing. Connect all plugs to the
main board (Main Controller Unit) and mount all protective
conductors.
3. Restore the original cable routings and cable fastenings.
4. Check the cable routing and fastening and make sure that
the cable cannot get between moving parts.
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