M3SR Series 4100 Control Unit Maintenance
3.110 Operating Manual 6175.4760.02 – 01
3.5.1.5 Control Unit Keyboard Test (4031)
Figure 3.60 Menu 4031: CU Keyboard Test
The menu CU Keyboard Test is used to test proper operation of all the keys (numeric key-
pad, softkeys and buttons, see sect. 3.2 Operating Concept) and the knob of the control unit.
Press the key you want to test or operate the knob. While pressing the key or operating the
knob, a clear indication will appear in the central area of the menu. If the indication does not
appear, the key or the knob is defective.
To leave the menu
• press the MENU/HOME key and the ENT key simultaneously or
• wait for 10 seconds (do not press a key or operate the knob for 10 seconds)
and you will navigate back to the menu CU MTC 1/4.
The 'ON/OFF' button does not switch the control unit off in this menu. The 'MENU/
HOME' button does not navigate to the home menu in this menu. To switch the control
unit off or to navigate to the Home menu, first leave the menu as explained above.
ICN-4D-G-231000-R-D0894-00067-A-01-1
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