User's Manual

30 kW S-BAND/U ANTENNA GROUP

CORRECTIVE MAINTENANCE

6.3 Rev. C

(Chapter 9, Figure 9.1.30 pos. 1)

3. Remove the fuse from the fuse-holder

c) Installation

1. In order to install the new fuse, perform the removal

operations in reverse order

6 .2 .1 .2 Replacem ent of t he POW ER MOS Boa rd

a) Required Tools

- set of open wrenches

- set of screwdrivers

b) Removal

1. By means of the proper screwdriver, unscrew the six

screws (Chapter 9, Figure 9.1.29 pos. 1) locking the front

cover (Chapter 9, Figure 9.1.29 pos. 2) and open the former

2. Remove the POWER MOS Board (Chapter 9, Figure 9.1.30

pos. 2) cabling by tacking note of its disposition

3. By means of the proper open wrench, unscrew the nuts

(Chapter 9, Figure 9.1.30 pos. 3) fastening the POWER

MOS Assy to the frame and remove the Assy

4. By means of the proper open screw, unscrew the nuts

fastening the POWER MOS board to the Assy and remove

the board

c) Installation

1. In order to install the new Electronics Assy with POWER

MOS board, perform the removal operations in reverse

order

2. By following the procedures of Card 8 of Chapter 4,

calibrate the Performance Monitor circuit (if present); during

the calibration do not take into account the steps relevant to

the Noise Ring distance