Tait International Limited TBCK4B Manual Do Utilizador

TB9400 Installation and Operation Manual

© Tait Electronics Limited September 2011

You must disconnect the AC and DC power cables before 
removing the PMU from the subrack.

1.

If you have not already done so, carry out the instructions in 

2.

At the front of the PMU, unplug and remove the output power 
cable 

b

 to the subrack interconnect board.   Also unplug and remove 

the system control bus cable 

c

.

3.

Unplug the output power cable to the PA 

d

 and move it to one side.

4.

Loosen the screws securing the retaining clamps 

e

 and rotate the 

clamps through 90° to clear the module.

5.

Slide the PMU out of the subrack, taking care not to damage any of 
the cables.

1.

Slide the replacement PMU into the subrack and secure it with the 
retaining clamps.

2.

Reconnect all the front and rear panel cables previously disconnected. 
Connect the DC power cables on the rear panel as shown in 

. Tighten the screws to a torque of 18 – 20 lbf · in 

(2 – 2.25 N · m).  Ensure  the  front  panel cables are positioned correctly, 
and retained where required by the cable retaining clips in the top of 
the subrack (refer to 

3.

Carry out the instructions in 

(obscured)

50 W base station

100 W base station

b

c

d

d

e

e

e

(obscured)

e