Comprehensive CSC-7850 - Manual (Page 13)

Connecting your Presentation Switcher / Scaler
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5. Connect the power cord 1 (the power connector is not illustrated in
Figure 3).
6. If required, connect A PC via RS-232, see section 6.1
Figure 3: Connecting the CSC-7850 Rear Panel
1 We recommend that you use only the power cord that is supplied with this machine