Oracle SPARC M7, Service Manual, Page: 257 / 330

Remove a PDU
■
L2, L1, L0
where R indicates the right PDU from the rear of the server, L indicates the left PDU from the
rear of the server, and the number represents the PDU group number.
Note -
In configurations where additional equipment is installed in the rack, and you do not
want to power down the additional equipment, remove power by unplugging the AC input
power cords at the SPARC M8-8 or SPARC M7-8 AC inlets. First, unplug the power cords at
the even numbered AC inlets 0, 2, 4. Next, unplug the power cords at the odd numbered AC
inlets 1, 3, 5.
Caution -
Because standby power is always present in the server, you must switch off the
circuit breakers on the PDUs before servicing any component that requires the server to be
powered off.
4. Switch off the facility circuit breakers to the PDU.
Caution -
Verity that you are only de-energizing power to the faulty PDU.
5.
Disconnect any power jumper cords connected to the faulty PDU from
equipment in the rack.
Note where these jumper cords were attached to the PDU. You will need to reinstall the jumper
cords in the same locations on the new PDU.
6.
Cut any tie-wraps securing the faulty PDU power input lead cords to the tie-down
brackets.
7.
Disconnect the grounding straps connected to the faulty PDU.
The PDU grounding straps are connected in different locations in a Sun Rack II and an Oracle
Rack Cabinet 1242.
Servicing PDUs 257