Lenovo ThinkSystem SD550 V3 User Manual page 145

– Never touch the gold memory module connector contacts or allow these contacts to touch the outside
of the memory module connector housing.
– Handle memory modules with care: never bend, twist, or drop a memory module.
– Do not use any metal tools (such as jigs or clamps) to handle the memory modules, because the rigid
metals may damage the memory modules.
– Do not insert memory modules while holding packages or passive components, which can cause
package cracks or detachment of passive components by the high insertion force.
• When a processor is installed, each of the DIMM slots connected to the processor must be installed with a
DIMM or DIMM filler.
– DIMM slots 1-8 are connected to processor 1
– DIMM slots 9-16 are connected to processor 2
Important: Remove or install memory modules for one processor at a time.
Procedure
Attention: Make sure to remove or install memory module 20 seconds after disconnecting power cords from
the system. It allows the system to be completely discharged of electricity and safe for handling memory
module.
Step 1. Make preparations for this task.
a. Power off the node (see
from the node.
Note: If necessary, press the release clip with a flat-head screwdriver to remove an external
network cable from the rear of a 2U node.
b. Remove the node from the chassis (see
carefully lay the node on a flat, static-protective surface, orienting the node with the front
toward you.
Notes:
• When removing the node, note the node tray number and make sure to install the node in
the same tray from which it was removed. Reinstalling the node into a different tray requires
the node to be reconfigured.
• For safety, make sure to hold the node with both hands when lifting the node.
c. Remove the top cover (see
d. To replace a front memory module (any between memory slots 1-8):
"Power off the node" on page
"Remove a node from the chassis" on page
"Remove the top cover" on page
53); then, disconnect all external cables
203).
.
Chapter 5 Hardware replacement procedures
75); then,
135