Manual 7-9415-1.4 Page 22
TX RX Systems Inc. 08/31/06
61-65-50 UserMan page 22 of 24
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.
RECOMMENDED SPARES
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
