Lenovo ThinkSystem DM240N Service Manual - Page 20
Browse online or download pdf Service Manual for Server Lenovo ThinkSystem DM240N. Lenovo ThinkSystem DM240N 34 pages. Hot-add a shelf, shelves, support for dg5000 and dg7000
Also for Lenovo ThinkSystem DM240N: Instructions (3 pages), Manual (7 pages), Manual (21 pages)
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Step 3.
Remove the NSM module from the shelf:
a.
Loop your index fingers through the finger holes of the latching mechanisms on either side of
the NSM module.
Note: If you are removing the bottom NSM module, and if the bottom rail is obstructing
access to the latching mechanisms, place your index fingers through the finger holes from the
inside (by crossing your arms).
b.
With your thumbs, press down and hold the orange tabs on top of the latching mechanisms.
The latching mechanisms raise, clearing the latching pins on the shelf.
c.
Gently pull forward until the NSM module is about one third of the way out of the shelf, grasp
the NSM module sides with both hands to support its weight, and then place it on a flat stable
surface. When you begin pulling forward, the latching mechanism arms extend from the NSM
module and lock in their fully extended position.
Step 4.
Loosen the NSM module cover thumb screw and open the cover.
The FRU label on the NSM module cover shows the location of the RTC battery, near the front of
the NSM module and to the right of the power supply.
Step 5.
Physically identify the failed RTC battery.
The RTC battery attention (amber) LED, located on the board next to the battery slot, illuminates.
Note: The LED for the failed RTC battery remains illuminated for 10 minutes after you remove the
NSM module from the shelf.
Step 6.
Replace the RTC battery:
a.
Remove the battery by gently pushing it away from the holder until it is at an inclined angle
(tilted away from the holder), and then lift it out of the holder.
b.
Insert the replacement battery into the holder at an inclined angle (tilted away from the holder),
push it into an upright position, and then press it firmly into the connector until it is fully seated.
Note: The positive side of the battery, marked with a plus sign, is oriented outward (away from
the holder), corresponding to the plus sign marked on the NSM module board.
Step 7.
Close the NSM module cover, and then tighten the thumb screw.
Step 8.
Reinsert the NSM module into the shelf:
a.
Make sure that the latching mechanism arms are locked in the fully extended position.
b.
Using both hands, gently slide the NSM module into the shelf until the weight of the NSM
module is fully supported by the shelf.
c.
Push the NSM module into the shelf until it stops (about half an inch from the back of the shelf).
You can place your thumbs on the orange tabs on the front of each finger loop (of the latching
mechanism arms) to push in the NSM module.
d.
Loop your index fingers through the finger holes of the latching mechanisms on either side of
the NSM module.
Note: If you are inserting the bottom NSM module, and if the bottom rail is obstructing access
to the latching mechanisms, place your index fingers through the finger holes from the inside
(by crossing your arms).
e.
With your thumbs, press down and hold the orange tabs on top of the latching mechanisms.
f.
Gently push forward to get the latches over the stop.
g.
Release your thumbs from the tops of the latching mechanisms, and then continue pushing
until the latching mechanisms snap into place.The NSM module should be fully inserted into
the shelf and flush with the edges of the shelf.
Step 9.
Reconnect the cabling to the NSM module:
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Service Guide for DM240N