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l.
2.
3.
4.
5.
6.
Disconnect primary power cable W18 from its primary power source. Disconnect
the other end of the cable from AlOJl on the rear panel of the Receiver.
Disconnect the antenna cable from Jl-RF IN on the rear panel.
Disconnect the ground strap from the GROUND lug located on the rear panel.
Remove any other equipment or cables connected to connectors or jacks on the
rear panel. :
:
Remove
headph~nes,
if they are inserted, from the PHONES jack located on the
front panel.
Remove the four mounting screws from the front panel securing the Receiver to
the mounting rack.
WARNING
The Receiver weighs approximately 30 pounds. Be careful a.s the unit
is removed from the rack. Have a fIrm grip on the handles as the
weight leaves the rack so that it does not drop, causing injury to legs
or feet.
7. Grasp the Receiver by handles on the front panel and slide the unit out of the rack.
Place the unit on a bench.
The unit may be housed (stored), from inclement weather, in any structure that will sus-
tain a temperature between -40
0
and +70
0
C and a relative humidity of 10 to 95 percent. The unit
has :m indefinite shelf life stored under the above conditions except for the nickel cadmium battery
-:ontalnt!d on circuit module board A6A2.
:.3
INSTALL\ TION
The Receiver is designed to be mounted in a standard 19-inch rack. The sides of the Re-
-:t!lver ha'-vt! been drilled and tapped to accept standard slides. The use of slides, however, is optional
lnd
15
dt!pet.ldent on the individual site requirements .. If slides are installed, it is recommended that
..:abk retractors be used to simplify ex tending the Receiver out of the rack.
If
the unit is rack
mountt!d without the slides. access to the rear panel must be provided for connection of cables and
test equIpment. The power dissipation of the Receiver is approxftnately 50 Watts with most of the
power as heat. In most installations. special cooling will not be required. The top and bottom
covers on the Receiver. as well as the heat sinks on the rear panel, must be unobstructed to permit
propt!r air circulation. Critical dimensions of the RA6790/GM Receiver are shown in Figure 2-1.
:'.3.1
Rear Panel Jacks. Switches and Connectors
Access to' the rear panel should be allowed so that input and output connections .can be
convenien tly made or changed if desired. All connections except for the headphones are made from
the rear of the Receiver. A brief description of each rear panel switch and connector indicating
function and input/output parameters is presented. Figure 2-3 presents the rear panel view of the
Receiver showing the locations of the jacks. switches and connectors.
2-3
/
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