Fujitsu PRIMERGY RX2540 M6

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Disconnect the power cord from the PSU and remove it from the cable
clamp.
4.4.2 Disconnecting the power cord (DC PSU)
Example DC PSU -48 V
Figure 5: Disconnecting the server from the dc voltage - example DC PSU -48 V
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Loosen the two studs (1).
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Disconnect the power cord from the PSU (2).
Basic hardware procedures
54 Upgrade and Maintenance Manual RX2540 M6