Rohde & Schwarz Inc NV830X Benutzerhandbuch
Chapter 8
Service
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E-1
4. Undo the screws on the terminal rack on the left of the main switch and slide the terminal
rack to the left.
5. Pull forward the black stop lever on the underside of the main switch.
6. Carefully take out the main switch.
Fig. 3
Taking out the main switch
4.1.2
Installing Main Switch
1. Replace the main switch by proceeding in the reverse order.
2. Insert the cables into the corresponding openings and fasten them with screws.
Note
Notice how the cables are labeled and make sure they are in the right sequence, since
two of the three phase cables are the same color (black).
two of the three phase cables are the same color (black).
3. Measure the rotary field with the aid of a rotary field meter.
If the rotary field is correct, continue with the next step; if it is wrong, swap two wires from
the cable and measure the rotary field again.
the cable and measure the rotary field again.
4. Screw the main switch cover and the rotary knob back on.
Note
When working on the transmitter rack the main switch can be locked in the "OFF" posi-
tion (see next figure).
tion (see next figure).