Reinstalling M320 Components in the Chassis

Reinstalling an M320 Rear Fan Tray

To reinstall the rear fan tray (see Figure 1):

1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to an approved site ESD grounding point. See the instructions for your site.
2. Grasp the handle with one hand and place the other hand under the fan tray. Insert the fan tray straight into the chassis.
3. Tighten the captive screws on the top and bottom of the fan tray faceplate to secure it in the chassis.

Figure 1: Reinstalling the Rear Fan Tray

Reinstalling the M320 CBs

To reinstall CBs (see Figure 2):

1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to an approved site ESD grounding point. See the instructions for your site.
2. Carefully align the sides of the CB with the guides inside the chassis.
3. Slide the CB into the chassis, carefully ensuring that it is correctly aligned.
4. Grasp both ejector handles and press them inward to seat the CB.
5. Tighten the captive screws on the ejector handles, using a Phillips (+) screwdriver, number 2.
6. Repeat the procedure to reinstall the remaining CB.

Figure 2: Reinstalling a CB

Reinstalling the M320 SIBs

To reinstall the SIBs (see Figure 3):

1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to an approved site ESD grounding point. See the instructions for your site.
2. Place one hand underneath the SIB to support it. With the other hand, hold one of the ejector handles on the SIB faceplate.
3. Carefully align the sides of the SIB with the guides inside the chassis.
4. Slide the SIB into the chassis, carefully ensuring that it is correctly aligned.
5. Grasp both ejector handles and press them inward to seat the SIB.
6. Tighten the captive screws on the ejector handles.
7. Repeat the procedure for each of the remaining SIBs.

Figure 3: Reinstalling a SIB

Reinstalling the M320 Power Supplies

Reinstall the lowest power supply first and finish with the upper power supply. To reinstall AC or DC power supplies (see Figure 4):

1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to an approved site ESD grounding point. See the instructions for your site.
2. Loosen the captive screws on the installation handle completely, and remove the handle from the chassis.
3. Switch the circuit breaker on the DC power supply faceplate to the off position (O).
4. Using both hands, slide the power supply into the chassis until you feel resistance.
5. Firmly push the power supply into the chassis until it comes to a stop. The power supply faceplate should be flush with any adjacent power supply faceplates.
6. Tighten the captive screws on each side of the power supply faceplate to secure the power supply in the chassis.
7. Repeat the procedure for each of the remaining power supplies.

Figure 4: Reinstalling a Power Supply

Reinstalling the M320 FPCs

To reinstall FPCs (see Figure 5):

1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to an approved site ESD grounding point. See the instructions for your site.
2. Using the list you created when you removed the FPCs, locate the slot in the FPC card cage in which you plan to install the FPC.
3. Inspect the slots in the FPC card cage to verify that there are no missing or bent pins on the midplane.
4. Inspect each FPC to verify that the connectors are not misaligned or damaged.

   Caution: When the FPC is out of the chassis, do not hold it by the ejector handles, bus bars, or edge connectors. They cannot support its weight.

5. Lift the FPC into place and carefully align first the bottom and top of the FPC with the guides inside the card cage. Be sure the FPC is right-side up, with the components on the right of the FPC.
6. Gently rest the bottom edge of the FPC on the bottom edge of the slot opening, making contact a short distance forward of the power connector.

   Caution: Take care not to bend or otherwise damage the power connector prongs.

7. Slide the FPC all the way into the card cage until you feel resistance.
8. Starting with the ejector handles on the FPC faceplate nearly horizontal, simultaneously turn both ejector handles clockwise to seat the FPC.
9. If you are installing a Type 2 FPC or Type 3 FPC, tighten the screws inside the ejector handles to secure the FPC. Do not overtighten them.
10. Repeat the procedure to reinstall each remaining FPC.

Figure 5: Reinstalling an FPC

Reinstalling M320 Front Fan Trays

To reinstall the standard front fan trays (see Figure 6):

1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to an approved site ESD grounding point. See the instructions for your site.
2. Grasp one of the fan trays by its handles and insert it straight into the chassis.
3. Tighten the captive screw on each side of the fan tray faceplate to secure it in the chassis.
4. Repeat the procedure to reinstall the remaining fan tray.

Figure 6: Reinstalling a Front Fan Tray

Reinstalling the M320 Cable Management System

To reinstall the cable management system:

1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.
2. Position the cable management system on the studs on the lower front of the chassis.
3. Insert the nuts through the holes in the cable management system onto the studs on the chassis.
4. Using a 3/8-in. nut driver, tighten the nuts securely.