Cisco Systems uBR10-MC5X20H quick start Installing the UCH, Removing the UCH, Removing the Cables

3Installing the UCH

After the cables are installed in the UCH, perform the following steps to prevent ESD damage to the line card.

Note Before proceeding, remove the protective sticker covering the line card DS ports.

Step 1 Make sure that you are grounded using an ESD-preventive wrist or ankle strap.

Step 2 Attach a jumper cable to the ground point on the chassis.

Step 3 Briefly touch each cable’s center connector with the jumper cable to remove any built-up ESD potential.

Step 4 Position the UCH2 so the red line is on the same side as the red triangle on the faceplate.

Figure 3 Installing the UCH

Red line		Small pin
	US0	Red triangle
	US1
	US2
	US3
	US4
	US5
	US6	Shroud
	US8
		Large pin
Lead screw		155818
Cutout

Step 5 Align the end pins with the pin holes in the faceplate, and guide the UCH onto the faceplate.

Step 6 Hold the cables and UCH in place while finger tightening the leadscrew. Do not bend the cables at right angles.

Step 7 Use the flathead screwdriver to tighten the leadscrew 10 in–lbs, (maximum torque 15 in.-lbs).

Caution Torquing the leadscrew to more than

20in-lbs can cause the leadscrew to fail.

The UCH is fully engaged when the semi-circles on the shroud show metal and the red and black lines are completely covered. See Figure 3.

4Removing the UCH

Step 1 Make sure that you are grounded using an ESD-preventive wrist or ankle strap.

Step 2 Loosen the lead screw (counterclockwise) until it disengages from the faceplate.

Step 3 Gently pull the UCH straight away from the faceplate.

Note If the UCH does not easily pull away from the card, loosen the lead screw until it completely disengages from the faceplate.

Figure 4 Removing the UCH

Red line

Shroud

1/4 in.	flathead	155819
screwdriver

5Removing the Cables

Step 1 Use the T-10 TORX driver tool to loosen the lock bar on the side you want to remove cables.

Step 2 Slide the lock bar open by hand, or with a flathead screwdriver if the bar is stuck or hard to access. See Figure 5.

(Make sure the lock bar is completely open or the cables will not release.)

Caution Be careful not to bend the cables.

Step 3 Carefully pull the cable out of the hole.

Figure 5 Sliding Open the Lock Bar

155820

6Troubleshooting

Check the following:

1.Verify that the lead screw is tight.

2.Verify that the shroud fits snugly against the faceplate (the cutouts are closed).

3.Verify that the cables are properly seated and secure in the UCH.

If downstream RF power measurements are made, use these ESD precautions to prevent damage to the product:

1.Check for a proper ground on the equipment and chassis before connecting any cables.

2.Ensure that there is a common ground between all the test equipment that you are using and the unit under test.

3.Keep test cables as short as possible to limit static buildup.

4.Before attaching any test cables to the unit under test, momentarily ground the center pin of the test cable to remove any ESD potential that may be present.

Contact Cisco TAC for further information:

http://www.cisco.com/tac

Tool Manufacturers and Part Numbers

Table 3 Tool Part Numbers

Cisco Systems

MC5X20 dual-shielded	CAB-RFSW520TPMF=
MC5X20 quad-shielded	CAB-RFSW520QTPMF=
UCH2	CAB-520-UCH2

White Sands Engineering, Inc.

F and MCX crimper tool	PN–ACT-483
MCX connector strip tool:
Dual-shielded cables	PN–CPT-7538-125
Quad-shielded cables	PN–CPT-7538-200Q
Dual-shielded F connector	CPT-7538
strip tool
Quad-shielded F connector	CPT-7538Q
strip tool
75–ohm precision miniature
video cable:
Dual-shielded single cable	PN–WS940
Quad-shielded five pk	PN–WS386
MCX fixed pin conn.:
Dual-shielded cable	PN–MCXFP
Quad-shielded cable	PN–MCXFPQ
F conn.:
Dual-shielded cable	PN–ASFP
Quad-shielded cable	PN–ASFPQ

7Related Documentation

•Cisco uBR10-MC5X20S/U/H Cable Interface Line Card for the Cisco uBR10012 Router:

http://www.cisco.com/univercd/cc/td/doc/

product/cable/ubr10k/ubr10012/frus/

index.htm

•More Cisco cable products information: