Reinstalling Components in the T640 Chassis
After the T640 router 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:
Reinstalling the T640 Rear Fan Tray
To reinstall the rear fan tray (see Figure 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. For more information about ESD, see T640 Preventing Electrostatic Discharge Damage.
- Grasp the fan tray by its handles and insert it straight into the chassis.
- 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
To reinstall the SCGs (see Figure 2):
- 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.
- Carefully align the sides of the SCG with the guides in the SCG slot.
- Grasp the SCG by its handle and slide it straight into the chassis until it contacts the midplane.
- Tighten the captive screws on the corners of the SCG faceplate.
- Repeat the procedure to reinstall the remaining SCG.
Figure 2: Reinstalling an SCG
Reinstalling the T640 T-CBs
To reinstall T-CBs (see Figure 3):
- 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.
- Carefully align the sides of the T-CB with the guides inside the chassis.
- Slide the T-CB into the chassis, carefully ensuring that it is correctly aligned.
- Grasp both ejector handles and press them inward to seat the T-CB.
- Tighten the captive screws on the ejector handles, using a Phillips (+) screwdriver, number 2.
- Repeat the procedure to reinstall the remaining T-CB.
Figure 3: Reinstalling a T-CB
Reinstalling the T640 SIBs
To reinstall the SIBs (see Figure 4):
- 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.
- Place one hand underneath the SIB to support it. With the other hand, hold one of the ejector handles on the SIB faceplate.
- Carefully align the sides of the SIB with the guides inside the chassis.
- Slide the SIB into the chassis, carefully ensuring that it is correctly aligned.
- Grasp both ejector handles and press them inward to seat the SIB.
- Tighten the captive screws on the ejector handles.
- Repeat the procedure for each of the remaining SIBs.
Figure 4: 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 5.
- 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. For more information about ESD, see T640 Preventing Electrostatic Discharge Damage.
- Switch the circuit breakers on the power supply faceplate to the off position (O).
- Using both hands, slide the power supply into the chassis until you feel resistance.
- Twist the ejector handles at the upper corners of the power supply faceplate clockwise until they stop.
- Tighten the captive screws at the lower corners of the power supply faceplate to secure the power supply in the chassis.
- 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 5: Reinstalling a Power Supply
Reinstalling the T640 FPCs
To reinstall FPCs (see Figure 6):
- 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.
- 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.
- Lift the FPC into place and carefully align first the
bottom, then the 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.
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.
- Slide the FPC all the way into the card cage until you feel resistance.
- Starting with the ejector handles on the FPC faceplate nearly horizontal, simultaneously turn both ejector handles clockwise to seat the FPC.
- 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.
- Repeat the procedure to reinstall each remaining FPC.
Figure 6: Reinstalling an FPC
Reinstalling T640 Front Fan Trays
To reinstall front fan trays (see Figure 7):
- 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.
- Grasp one of the fan trays by its handles and insert it straight into the chassis.
- Tighten the captive screw on each side of the fan tray faceplate to secure it in the chassis.
- Repeat the procedure to reinstall the remaining fan tray.
Figure 7: Reinstalling a Front Fan Tray
Reinstalling the T640 Cable Management System
To reinstall the cable management system:
- Position the cable management system on the studs on the lower front of the chassis.
- Insert the nuts through the holes in the cable management system onto the studs on the chassis.
- Using a 3/8-in. nut driver, tighten the nuts securely.
