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8-22 SPARC Enterprise M4000/M5000 Servers Service Manual • August 2009
8.4.6 Removing the I/O Unit DC-DC Converter Riser
1. Loosen the two screws at the front of the I/O unit using a No. 2 screwdriver
(
FIGURE 8-14).
2. Push the I/O unit cover slightly forward and then pull the front of the cover up
to remove the cover from the I/O unit.
3. Loosen the three screws that hold the metal bracket in place and tilt the
bracket towards the front of the I/O unit to expose the inside of the I/O unit.
The bracket has a circuit board and cable connected to it. It is not necessary to
remove the entire bracket.
4. Pull the DC-DC converter riser from the socket (
FIGURE 8-14).
Determine if your server currently has a label installed on the I/O unit DC-DC
converter (DDC_B#0).
■ If your server does not have a label covering part of the I/O unit DC-DC
converter, go to Step 5.
■ If your server does have a label covering part of the I/O unit DC-DC converter,
start from one corner of the label and peel the label free of the I/O unit DC-DC
converter.
5. Disengage the DC-DC converter from the slot in the DC-DC converter riser or
DC-DC converter retainer and place them both on the ESD mat.