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7-10 SPARC Enterprise M8000/M9000 Servers Service Manual • June 2010
Note – DDC_A is displayed only for the M8000.
b. From the replacement parts list in the maintenance menu, select 1,
"CMU/IOU."
c. From here, perform the operation according to the guidance displayed in the
maintenance menu.
Check the states of LEDs (POWER LED: off; CHECK LED: blinking) on the
IOU to be replaced, and begin the actual replacement work when a message
instructing the user to replace the target IOU is displayed. Leave the
maintenance menu as is until Step 13.
5. Connect the clip of the antistatic wrist strap and of the antistatic mat to the
server grounding port. See Section 1.4, “Antistatic Precautions” on page 1-6.
6. Ensure that the metallic underside of the wrist strap is in direct contact with
your skin. The wrist strap should be snug around the wrist so that it does not
rotate. See Section 1.4, “Antistatic Precautions” on page 1-6.
Caution – Before handling FRUs, be sure to connect the clip of the antistatic wrist
strap and of the antistatic mat to the server grounding port, and attach the band of
the wrist strap to one of your wrists. Place the FRUs on the grounded antistatic mat.
Failure to take these antistatic measures might result in serious damage.
7. Remove the IOU to be replaced.
a. Using a Phillips screwdriver, turn the knob screws securing the upper and
lower eject/lock levers 90 to 180 degrees to unlock the levers. (Turn the knob
screw while lightly pulling the lever by one hand.)
b. Unlock the eject/lock levers to pull the IOU off the backplane.
c. While grasping the handle at the front of the IOU, pull the IOU out partially
until the [NEAR TO END] label comes into view.
d. Raise the handle at the upper part of the IOU.
e. While grasping the front and upper handles of the IOU, pull it out slowly
from the slot.
Note – To upgrade the IOU, remove the dummy (filler) unit before mounting the
IOU to be added. Since the same levers are used on the dummy (filler) unit, please
operate the eject/lock levers in the same manner.