Seagate Exos X 4006 Series Hardware Installation And Maintenance Manual page 114

2. Complete the following actions to remove the faulty PSU:
a. Facing the rear of the rack cabinet, switch off the power for that PCU, then disconnect its power cord.
b. Press the PSU release latch to the right to release the PSU from the midplane.
c. Use one hand to support the weight of the PSU and the other to pull the handle outward and withdraw the PSU.
d. Place it in a static-protected location.
3. Complete the following actions to replace the faulty PSU with a tested good one:
a. Facing the rear of the storage enclosure, orient the new PSU with the latch to the left.
b. Use one hand to support the weight of the PSU and the other to guide it into the empty PSU slot.
c. Exerting even pressure to the center, gently press inward until it connects with the midplane and it locks in place.
d. Connect the power cord, then move the PSU power switch to the ON position.
4. Verify that the PSU OK LED is lit green on the replaced PSU after properly inserting and seating it in the empty slot.
5. Facing the front of the storage enclosure, verify that the Power On LED is green and there are no fault conditions.
Figure 89 Power supply unit removal
Figure 90 Power supply unit
Chapter 11 In-service field maintenance for 5U enclosures
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