User's Guide

1. Installing Internal Optional Devices
Express5800/R120f-2M User’s Guide
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Chapter 2 Preparations
1.26.2
Installation
Follow steps below to install a power supply unit:
1. See steps 1 to 4 in Chapter 2 (1.3 Overview of Installation and Removal) for preparations.
2. Remove the blank cover.
Note
Keep the removed blank cover for future use.
3. Insert the power supply unit until it is locked with clicking sound.