Reinstalling Components in the T640 Chassis

After the T640 chassis is installed in the rack, you reinstall the removed components before booting and configuring the router. The following procedures describe how to reinstall components in the chassis, first in the rear and then in the front:

1. Reinstalling the T640 Standard or Quiet Rear Fan Tray
2. Reinstalling the T640 SCGs
3. Reinstalling the T640 Control Boards
4. Reinstalling the T640 SIBs
5. Reinstalling the T640 Power Supplies
6. Reinstalling the T640 FPCs
7. Reinstalling T640 Standard or Quiet Front Fan Trays
8. Reinstalling the T640 Cable Management System

Reinstalling the T640 Standard or Quiet 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 fan tray by its handles and insert it 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 T640 SCGs

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 SCG with the guides in the SCG slot.
3. Grasp the SCG by its handle and slide it straight into the chassis until it contacts the midplane.
4. Tighten the captive screws on the corners of the SCG faceplate.
5. Repeat the procedure to reinstall the remaining SCG.

Figure 2: Reinstalling an SCG

Reinstalling the T640 Control Boards

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 control board with the guides inside the chassis.
3. Slide the control board into the chassis, carefully ensuring that it is correctly aligned.
4. Grasp both ejector handles and press them inward to seat the control board.
5. Tighten the captive screws on the ejector handles, using a Phillips (+) screwdriver, number 2.
6. Repeat the procedure to reinstall the remaining control board.

Figure 3: Reinstalling a T-CB

Figure 4: Reinstalling an LCC-CB

Reinstalling the T640 SIBs

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 5: Reinstalling a SIB

Reinstalling the T640 Power Supplies

Each two-input 160-A DC power supply weighs approximately 23 lb (10.5 kg). Each three-input 240-A DC power supply weighs approximately 25 lb (11.3 kg). Each four-input 240–A weighs approximately 26.6 lb (12.0 kg).

Reinstall the lower power supply first, then the upper power supply. To reinstall the power supplies, 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. Switch the circuit breakers on the power supply faceplate to the off position (O).
3. Using both hands, slide the power supply into the chassis until you feel resistance.
4. Twist the ejector handles at the upper corners of the power supply faceplate clockwise until they stop.
5. Tighten the captive screws at the lower corners of the power supply faceplate to secure the power supply in the chassis.
6. Repeat the procedure for the upper power supply.

Caution: Removing the T640 Power Supplies shows the two-input 160-A DC power supply, but the procedure also applies to the three-input 240-A DC power supply or four-input 240-A DC power supply.

Figure 6: Reinstalling a Power Supply

Reinstalling the T640 FPCs

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 7: Reinstalling an FPC

Reinstalling T640 Standard or Quiet Front Fan Trays

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.

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. Locate the fan tray labeled FAN-T-FTOP-S UPPER FANTRAY.
3. Press the two latches located on each side of the quiet upper front fan tray up, and insert the fan tray straight into the upper front fan tray slot (see Figure 8).
4. Grasp the upper front fan tray by its handles and insert it straight into the upper fan tray slot (see Figure 8.
5. Tighten the captive screws on each side of the fan tray faceplate to secure it in the chassis.
6. Locate the quiet lower fan tray labeled FAN-T-FBOT-S LOWER FANTRAY.
7. Press the two latches located on each side of the quiet lower front fan tray up, and insert the fan tray straight into the lower front fan tray slot (see Figure 9).
8. Tighten the captive screws on each side of the quiet lower front fan tray faceplate to secure it in the chassis.

Figure 8: Reinstalling the Quiet Upper Front Fan Tray

Figure 9: ReInstalling the Quiet Lower Front Fan Tray

Figure 10: Reinstalling the Standard Upper Front Fan Tray

Reinstalling the T640 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.