User's Manual

68P81093C75-A 9-29
ASTRO Modem Card/
V.24 Interface Card
Physical Replacement of
the Card
1. Remove the Wireline Module as described above.
2. Unplug the faulty ASTRO Modem Card or the V.24 Interface
Card from the Wireline board by pressing the mounting posts
through the back of the board.
Install the replacement card by pressing it onto the Wireline
board and locking all mounting posts and connectors.
3. Re-install the Wireline Module as described above.
After Installing the New
Card
No alignments or adjustments are required. The card is configured
by the Station Control Module on power-up.
Receiver
Physical Replacement of
the Receiver Module
1. Turn off the station’s power by unplugging the AC and DC
power cords from the top panel.
2. Remove the eight Phillips screws from the edges of the station’s
top panel and lift the chassis out of the case.
3. Remove the cover plate on the left end of the front of the station
by removing the two screws from the front of the plate, then
removing the four Phillips screws from the side and bottom
edges of the plate. In VHF and UHF stations only, remove two
more Phillips screws from the bottom of the chassis under the
preselector.
4. A coaxial cable runs from a mini-UHF connector at the front of
the receiver, through the center wall of the chassis, and to the
top panel UHF connector.
Disconnect the cable from the receiver and push the loose end
of the cable through the center wall so that it is completely clear
of the receiver.
5. If the station is 800 MHz, pull the receiver mounting plate from
its position on top of the receiver out of the chassis.
6. Pull the old receiver out by gripping the tabs protruding past
each end of the preselector for VHF and UHF stations, or by
gripping the mini-UHF connector for 800 MHz stations.
7. Insert the new module. Make sure it sits flat against the bottom
of the chassis. Push it firmly into the chassis until it seats into
the card-edge connector on the backplane. (Do not slam the
board against the backplane or push any harder than necessary
to seat the connectors.)