User's Manual Part 3

Multi–Channel CDMA Card – continued

MAY 2004 1X SC480 BTS Hardware Installation, Optimization/ATP, and FRU 9-29

PRELIMINARY

Replacement Items

S Up to 3 MCC–1X–16 cards (SGLN6117)

S Up to 3 MCC–1X–32 cards (SGLN6050)

S Up to 3 MCC–1X–48 cards (SGLN6051)

S Up to 3 MCC–1X–64 cards (SGLN6052) (for Packet Backhaul)

Prerequisite

Coordinate this repair task with the OMC–R operator.

IMPORTANT

Contact the OMC–R operator before performing the replacement

procedure. Tell the operator that the MCC–1X card will be replaced and

that alarms can be expected.

Upon completion of the replacement procedure, have the OMC–R

operator verify that old alarms are cleared and that no new ones are

reported.

Replacement Procedure

This procedure requires working around circuitry that is

extremely sensitive to Electrostatic Discharge (ESD). Wear

a conductive, high impedance wrist strap during the

procedure.

Use appropriate safety measures.

CAUTION

If desired, record the BTS and MCC serial number of the failed unit in

Table 9-60 at the end of this chapter.

Remove MCC–1X Card

Follow the procedure in Table 9-16 to remove the MCC–1X card.

Table 9-16: Procedure to Remove MCC–1X Card

Step Action

n WARNING

Due to a lack of redundancy, disengaging the MCC cards from the CCP2 Shelf will cause the site to be

shutdown due to the disruption in communication with the GLI3.

1 Notify operator that the MCC replacement procedure is starting and that alarms can be expected.

2 Put on the ESD wrist strap or other approved grounding device.

3 If not already done, remove BTS front panel cover by grasping finger grooves at the top and bottom

and pulling simultaneously.

table continued on next page