Bird Technologies Group 5PI616550 Manual De Usuario

3) Reverse steps 2 and 1 to install the replace-

ment assembly. When replacing the RF cables
do not overtighten the SMA connectors. They
should be tightened just slightly more than hand
tight or to the specification of 7 in/lbs.

Card Cage Replacement
To replace the card cage follow the steps listed
below in sequential order. The required tools are a
#1 Phillips screwdriver with an extended shaft to
reach down far enough into the unit to loosen the
mounting screws.

Note: Power to the SB II cabinet must
be turned OFF during the card cage
replacement process.

1) Disconnect the display/user interface assembly.

2) Disconnect 4 cables at the backplane of the

card cage which are assessable with the dis-
play/user interface board out of the way.

3) Remove the row of Phillips screws which hold

the card cage to the back plate. There is a row
of screws at the top and bottom of the cage.

4) To install a replacement cage perform steps 3

through 1 in reverse order.

It is recommended that one spare of each of the
following assemblies be kept on hand for emer-
gency repair purposes; Power Supply 8-20667,
Uplink/Downlink Power Amplifier 3-20807, Mid
Level Amplifier Card 3-19576, Low Level Amplifier
Card 3-19935, Low Gain Amplifier Card 3-20294,
and Half-Gain Low-Level Amplifier Card 3-21035,
Attenuator Card 3-20208, Power Distribution Card
3-19833, Controller Card 3-19832, and the Display/
User Interface Assembly 3-19831.

NOTE

Figure 13: Disconnecting the display/user interface assembly from the card cage.

Disconnect

ribbon cable

here