EMC AX100 Series Operating and safety instructions

1
This document describes how to replace the dual in-line memory
modules (DIMMs, or memory cards) on an AX100-Series motherboard.
Topics include
◆Handling FRUs ......................................................................................2
◆Removing the Storage Processor Assembly ......................................4
◆Replacing the Memory Card................................................................9
◆Replacing the Storage Processor Assembly.....................................11
For greater clarity, the illustrations in this note show the storage-system chassis
independent of a cabinet or deskside mounting hardware.
AX100-Series
Replacing a Memory Card
Revision A03
June 6, 2005

2
AX100-Series Replacing a Memory Card
Handling FRUs
Handling FRUs
This section describes the precautions that you must take and the
general procedures you must follow when removing, installing, and
storing memory cards, the storage processor assembly, or any other
field replaceable unit (FRU).
Power Issues and
FRUs AX100-Series storage systems are designed to be powered up
continually. Disks and power supplies are hot repairable; that is, you
can replace faulty units while the system is running. Front bezels
should always be attached and each compartment should contain a
FRU or filler panel to ensure EMI compliance and proper air flow
over the FRUs.
You should not remove a faulty FRU until you have a replacement
available.
When you replace or install FRUs, you can inadvertently damage the
sensitive electronic circuits in the equipment by simply touching
them. Electrostatic charge that has accumulated on your body
discharges through the circuits. If the air in the work area is very dry,
running a humidifier in the work area will help decrease the risk of
ESD damage. You must follow the procedures below to prevent
damage to the equipment.
Read and understand the following instructions:
◆Provide enough room to work on the equipment. Clear the work
site of any unnecessary materials or materials that naturally build
up electrostatic charge, such as foam packaging, foam cups,
cellophane wrappers, and similar items.
◆Do not remove replacement or upgrade FRUs from their antistatic
packaging until you are ready to install them.
◆Before you service a storage system, gather together the ESD kit
and all other materials you will need. Once servicing begins,
avoid moving away from the work site; otherwise, you may build
up an electrostatic charge.
◆An ESD wristband is supplied with your storage system. To use
it, attach the clip of the ESD wristband (strap) to any bare
(unpainted) metal on the storage system; then put the wristband
around your wrist with the metal button against your skin.

AX100-Series Replacing a Memory Card
3
Handling FRUs
◆Use the ESD kit when handling any FRU. If an emergency arises
and the ESD kit is not available, follow the procedures in the
Emergency Procedures (Without an ESD Kit) section.
Emergency
Procedures (Without
an ESD Kit)
In an emergency when an ESD kit is not available, use the following
procedures to reduce the possibility of an electrostatic discharge by
ensuring that your body and the subassembly are at the same
electrostatic potential.
These procedures are not a substitute for the use of an ESD kit.
Follow them only in the event of an emergency.
◆Before touching any FRU, touch a bare (unpainted) metal surface
of the cabinet or storage system.
◆Before removing any FRU from its antistatic bag, place one hand
firmly on a bare metal surface of the storage system, and at the
same time, pick up the FRU while it is still sealed in the antistatic
bag. Once you have done this, do not move around the room or
touch other furnishings, personnel, or surfaces until you have
installed the FRU.
◆When you remove a FRU from the antistatic bag, avoid touching
any electronic components and circuits on it.
◆If you must move around the room or touch other surfaces before
installing a FRU, first place the FRU back in the antistatic bag.
When you are ready again to install the FRU, repeat these
procedures.

4
AX100-Series Replacing a Memory Card
Removing the Storage Processor Assembly
Removing the Storage Processor Assembly
Removing the storage processor assembly from the AX100-Series
chassis provides access to internal parts that you can replace,
including memory cards, system and CPU fans, and, on
AX100SC/AX100SCi models, a battery-backed cache card.
1. Push the On/Off button to turn off power. Wait a full minute for
the storage system to power down.
2. Once your system is powered down, release the retention bail(s)
and unplug the ac line cord(s) as shown in Figure 1.
Figure 1 Unplugging the ac Power Cord
3. Unplug your LAN, data, and serial cables from the back of the
storage system. Label each connection for easy reference when
you replace the connections.
4. Remove the assembly from the storage-system chassis.
EMC2815
Retention
Bail

AX100-Series Replacing a Memory Card
5
Removing the Storage Processor Assembly
CAUTION
!
The SP assembly weighs approximately 20 pounds (9 kg) and
comes completely out of the storage-system chassis; be prepared to
support the assembly without dropping it.
a. For systems with knob-style securing latches at either side of the
storage processor assembly, turn the latches 1/4 turn — until
the loop aligns vertically with the chassis; then use the finger
holds to carefully pull the assembly straight out as shown in
Figure 2.
.
Figure 2 Removing the SP Assembly from the Chassis (Knob Latches)
b. For systems with hoop-style securing latches, push the latches
inward to release the storage processor assembly as you
carefully pull the assembly straight out. See Figure 3.
Released
Position
Finger
Hold EMC2808

6
AX100-Series Replacing a Memory Card
Removing the Storage Processor Assembly
Figure 3 Removing the SP Assembly (Hoop Latches)
5. Place the assembly on a clean, anti-static surface.
EMC3119
Spring
Release

AX100-Series Replacing a Memory Card
7
Removing the Storage Processor Assembly
Removing the SP Assembly Cover
1. Facing the assembly from the rear, press the cover release buttons
on each side of the SP assembly as you pull the cover back with
your thumbs. This action, shown in Figure 4, releases the cover
from the SP assembly chassis.
Figure 4 Releasing the Storage Processor Assembly Cover
2. Carefully pull the SP assembly cover back, up, and out of the
chassis tab slots, as shown in Figure 5.
Note that the cover remains attached to the assembly motherboard by
short power cord cluster(s).
1
2
3
4
5
Cover
Release Button
(each side)
Thumb position
EMC2803

8
AX100-Series Replacing a Memory Card
Removing the Storage Processor Assembly
Figure 5 Lifting the Cover from the SP Assembly Chassis
3. Without straining the power cord cluster(s), turn the cover over and
rest it against the side and the system fans, as shown in Figure 6.
Figure 6 Resting the Cover Against the SP Assembly Chassis
Once the cover is off and resting securely on the sides of the SP
assembly chassis, you can remove the failed memory card from the
motherboard, as described in the next section.
1
2
3
4
5
10%
EMC2816
Tabs
Tab Slots
1
2
3
4
5
10%
EMC2817

AX100-Series Replacing a Memory Card
9
Replacing the Memory Card
Replacing the Memory Card
Make sure you have an ESD wriststrap attached to your wrist as you
perform the following steps.
The illustrations in this section show the replacement of the SP A memory
card, in an AX100SC/AX100SCi. The memory card for SP B and the
procedure to remove it are identical, except that the second memory card
resides to the left (from the system rear) of SP A.
Removing the Card
1. To release the memory card from the system processor
motherboard, push down on the spring latches on either side of
the card.
2. Take care to touch only the outside edges as you pull the memory
card straight up and out of the connector. See Figure 7.
Figure 7 Removing the Memory Card from the Motherboard
3. Place the memory card in an antistatic bag and return it to your
service provider.
1
2
3
4
5
10%
Cover removed for clarity
EMC2823
Key
Memory Card
Release
Latches

10
AX100-Series Replacing a Memory Card
Replacing the Memory Card
Replacing the Memory Card
1. Remove the replacement card from its antistatic bag.
2. Handling only the outside edges, align the new memory card
with the motherboard connector. Note that the connector and
card are keyed to prevent incorrect alignment.
3. Carefully push the memory card straight down into the connector
as shown in Figure 8. When the card is properly seated into the
connector, the release latches will snap into place, securing the
connection.
Figure 8 Connecting the Memory Card to the Motherboard
1
2
3
4
5
10%
Cover removed for clarity
EMC2820
Key
Memory Card

AX100-Series Replacing a Memory Card
11
Replacing the Storage Processor Assembly
Replacing the Storage Processor Assembly
Follow these steps to replace the storage processor assembly in the
AX100-Series chassis.
Replacing the SP Assembly Cover
1. Without straining the power cord cluster(s), turn the cover over and
into position on the SP assembly chassis.
2. Align the tab slots with the tabs on the cover, and slide the cover
down until it snaps into place. See Figure 9.
Figure 9 Replacing the SP Assembly Cover
Replacing the SP Assembly in the Chassis
1. Slide the SP assembly into the storage system chassis.
a. For systems with knob-style securing latches at either side of the
storage processor assembly, set the latch knobs in the vertical
(released) position, then push the storage processor assembly
directly into the chassis, as shown in Figure 10. To secure the
assembly in the chassis, turn the latch knobs 1/4 turn to a
horizontal position.
1
2
3
4
5
10%
EMC2826
Tabs
Tab Slots

12
AX100-Series Replacing a Memory Card
Replacing the Storage Processor Assembly
Figure 10 Installing the SP Assembly in the Chassis (Knob Latches)
b. For systems with hoop-style securing latches at either side of the
storage processor assembly, simply push the storage processor
assembly directly into the chassis, as shown in Figure 11.
Figure 11 Installing the SP Assembly in the Chassis (Hoop Latches)
2. Replace the data, LAN, serial, and power connections you
removed earlier.
3. Remove and store your ESD wriststrap.
Released
Position
Finger
Hold EMC2825
EMC3124

AX100-Series Replacing a Memory Card
13
Replacing the Storage Processor Assembly
4. Power up the storage system.

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AX100-Series Replacing a Memory Card
Replacing the Storage Processor Assembly
Copyright © 2004, 2005 EMC Corporation. All Rights Reserved.
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