AX100-Series - Replacing a CPU Fan (6 or 7) -- A03

8/8/2019 AX100-Series - Replacing a CPU Fan (6 or 7) -- A03

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This document describes how to replace a CPU fan on the AX100-Seriesmotherboard. CPU fan 6 is dedicated to the central processing unit onSP A, and is the only CPU fan in AX100SC/AX100SCi systems. CPU fan7 cools the processor on SP B in an AX100 or AX100i storage system.(Replacing a failed system fan 1-5 is covered in another note.) Topics

include Handling FRUs ......................................................................................2 Removing the Storage Processor Assembly ......................................4 Replacing the CPU Fan.........................................................................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 CPU Fan 6 or 7

Revision A03

June 6, 2005


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2 Handling FRUs

Handling FRUs

Handling FRUsThis section describes the precautions that you must take and thegeneral procedures you must follow when removing, installing, andstoring fans, the storage processor assembly, or any other FieldReplaceable 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, youcan replace faulty units while the system is running. Front bezelsshould always be attached and each compartment should contain aFRU or filler panel to ensure EMI compliance and proper air flowover the FRUs.

You should not remove a faulty FRU until you have a replacementavailable.

When you replace or install FRUs, you can inadvertently damage thesensitive electronic circuits in the equipment by simply touchingthem. Electrostatic charge that has accumulated on your bodydischarges 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 ofESD damage. Follow the procedures below to prevent damage to theequipment.

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 buildup electrostatic charge, such as foam packaging, foam cups,cellophane wrappers, and similar items.

Do not remove replacement or upgrade FRUs from their antistaticpackaging until you are ready to install them.

Before you service a storage system, gather together the ESD kitand all other materials you will need. Once servicing begins,avoid moving away from the work site; otherwise, you may buildup an electrostatic charge.

An ESD wristband is supplied with your storage system. To useit, 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.


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AX100-Series Replacing a CPU Fan 6 or 7 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 theEmergency Procedures (Without an ESD Kit) section.

EmergencyProcedures (Withoutan ESD Kit)

In an emergency when an ESD kit is not available, use the followingprocedures to reduce the possibility of an electrostatic discharge byensuring that your body and the subassembly are at the sameelectrostatic 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 surfaceof the cabinet or enclosure.

Before removing any FRU from its antistatic bag, place one handfirmly on a bare metal surface of the enclosure, and at the sametime, 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 touchother furnishings, personnel, or surfaces until you have installedthe FRU.

When you remove a FRU from the antistatic bag, avoid touchingany electronic components and circuits on it.

If you must move around the room or touch other surfaces beforeinstalling a FRU, first place the FRU back in the antistatic bag.

When you are ready again to install the FRU, repeat theseprocedures.


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4 Removing the Storage Processor Assembly

Removing the Storage Processor Assembly

Removing the Storage Processor AssemblyRemoving the storage processor assembly from the AX100-Serieschassis provides access to internal parts that you can replace,including memory cards, system and CPU fans, and, onAX100SC/AX100SCi models, a battery-backed cache card.

Make sure you have an ESD wriststrap attached to your wrist as youperform the following steps.

1. Push the On/Off button to turn off power. Wait a full minute forthe 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 an ac Power Cord

3. Unplug your LAN, data, and serial cables from the back of theAX100-Series storage processor assembly. Label each connectionfor easy reference when you replace the connections.

4. Remove the assembly from the storage-system chassis.

EMC2815

Retention

Bail


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CAUTION!The SP assembly weighs approximately 20 pounds (9 kg) andcomes completely out of the storage-system chassis; be prepared tosupport the assembly without dropping it.

a. For systems with knob-style securing latches at either side of thestorage processor assembly, turn the latches 1/4 turn untilthe loop aligns vertically with the chassis; then use the finger

holds to carefully pull the assembly straight out as shown inFigure 2.

.

Figure 2 Removing the SP Assembly from the Chassis (Knob Latches)

b. For systems with hoop-style securing latches, push the latchesinward to release the storage processor assembly as youcarefully pull the assembly straight out. See Figure 3.

Released

Position

Finger

HoldEMC2808


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Figure 3 Removing the SP Assembly (Hoop Latches)

5. Place the assembly on a clean, anti-static surface.

EMC3119

Spring

Release


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Removing the SP Assembly Cover

1. Facing the assembly from the rear, press the cover release buttonson each side of the SP assembly as you pull the cover back withyour thumbs. This action, shown in Figure 4, releases the coverfrom the 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 byshort power cord cluster(s).

1

2

3

4

5

CoverRelease Button

(each side)

Thumb position

EMC2803


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Figure 5 Lifting the Cover from the SP Assembly Chassis

3. Without straining the power cord cluster(s), turn the cover over andrest 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 SPassembly chassis, you can remove the SP fan from the AX100-Seriesmotherboard, as described in the next section.

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5

10%

EMC2816

Tabs

Tab Slots

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5

10%

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Replacing the CPU Fan

Replacing the CPU FanMake sure you have an ESD wriststrap attached to your wrist as youperform the following steps.

The illustrations in this section show the replacement of CPU fan 6, in anAX100SC/AX100SCi. Use the same procedure to replace fan 7. The secondCPU fan resides on SP B, to the left (from the system rear) of SP A.

Removing the CPU Fan

Refer to Figure 7 as you remove the CPU fan.

1. Carefully disconnect the power cable that connects the fan to themotherboard.

2. Pull the fan straight up, out of the connector, and away from themotherboard.

Figure 7 Removing the CPU Fan from the Motherboard

3. Place the fan in an antistatic bag and return it to your service

provider.

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10%Cover removed for clarity EMC2822a


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10 Replacing the CPU Fan



1. Remove the replacement fan from its antistatic bag.

2. Align the replacement fan as indicated by the arrows on its topand side (the arrows should point up from the motherboard andaway from the processor). Note that the power cord cancomfortably reach the motherboard only in the correctorientation.

3. Carefully push the replacement fan straight down and into itsconnector, then connect the power cord. The connector is keyedto ensure the correct orientation. See Figure 8.

Figure 8 Connecting the CPU Fan to the Motherboard

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10%Cover removed for clarity

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Replacing the Storage Processor Assembly


Make sure you have an ESD wriststrap attached to your wrist as youfollow these steps to replace the storage processor assembly in theAX100-Series chassis.

Replacing the SP Assembly Cover

1. Without straining the power cord cluster, turn the cover over andinto position on the SP assembly chassis.

2. Align the tab slots with the tabs on the cover, and slide the coverdown until it snaps into place. See Figure 9.

Figure 9 Replacing the 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 assemblydirectly into the chassis, as shown in Figure 10. To secure theassembly in the chassis, turn the latch knobs 1/4 turn to ahorizontal position.

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5

10%

EMC2826

Tabs

Tab Slots


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12 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 thestorage processor assembly, simply push the storage processorassembly 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 the ESD wriststrap.

Released

Position

Finger

HoldEMC2825

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4. Power up the storage system.

5. Use Navisphere Express to verify that the new fan isoperational.

a. From a network-connected station, start Navisphere Expressfor the AX100-Series storage system by entering the IP addressin a browser window. (Refer to the release notes on the AX100support website for a list of supported browsers.)

b. In the navigation pane, under View, click components.

c. Scan the list of components to verify that the new fan isrecognized and working properly.


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14 Replacing the Storage Processor Assembly


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AX100-Series - Replacing a CPU Fan (6 or 7) -- A03