FUJITSU SPARC ENTERPRISE M8000 User Manual

Page 211

Chapter 7

I/O Unit (IOU) Replacement

7-17

5. Switch off all main line switches for the AC section (ACS) in the power supply

system.

For details, see

Note –

If the optional three-phase 200 VAC input power supply unit is installed, the

main line switches are located on the three-phase ACS.

Caution –

If the dual power feed option is installed, switch off the main line

switches for both power supply units.

Caution –

After stopping all the domains, be sure to switch off the main line

switches in the power supply system to completely shut off the supply of power.

6. Connect the wrist strap clip to a cabinet grounding port, and attach the band of

the wrist strap to one of your wrists.

7. Remove the IOU to be replaced. (See

FIGURE 7-7

)

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.

Caution –

An IOU with mounted components in the maximum configuration

weighs about 21 kg.

8. Place the removed IOU on an antistatic conductive mat.