Acer Altos MU.R230E.001 - Manual (Page 67)

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• Install FBD pair upgrades in the following sequence:
– First FBD pair: DIMMA1 and DIMMB1 slots
– Upgrade 1: DIMMC1 and DIMMD1 slots
– Upgrade 2: DIMMA2 and DIMMB2 slots
– Upgrade 3: DIMMC2 and DIMMD2 slots
To remove an FBD:
Important: Before removing an FBD, make sure to back up all
important system files. Also, note that FBDs should be removed
in pairs.
1 Perform the pre-installation instructions described on page 37.
2 Lay the server on its side (components showing).
3 Remove the air duct to access to the FBD slots.
(1) Remove the three screws that secure the air duct.
(2) Detach the air duct from the heat sink-fan.