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NOTE
The USB line level was adjusted when the MAIN LINE
LEVEL was set since the USB AF uses the main AF
channel when the Receiver is in the USB mode.
e; Turn POWER switch to off and disconnect the generator.
2.3.4
RA6790/GM Receiver System Connections
System connections for the Receiver are based on theindividuai site requirements and
the options associated with a Receiver. The site requiremerits will determine the most effective
method of installation. In some installations, it may be easier to pre-wire an entire equipment rack
and then install the Receiver. In others, it may be easier to install the Receiver and then add the
wiring. The folloWing paragraphs detail the procedures associated with installing the Receiver.
Figure 2-10 illpstrates the connectors located on the rear panel of the Receiver.
2.3.4.1
Power Input Connections
A three-conductor power cord is supplied with the Receiver for connection to the power
input plug. The connector has the following pin assignments, as viewed from the rear panel:
Left Pin:
Center Pin:
Right Pin:
LINE
GROUND
NEUTRAL
With the power cable unplugged from the Receiver, the clear plastic window can be slid
over the three male power receptacle prongs. This exposes the line fuse and a hinged, plastic FUSE
PULL lever.
If
the voltage shown does not match the available line voltage, remove the pc wafer and
reinstall it so that the line voltage closest to the available line voltage is visible with the pc wafer in
position. Install the fuse suitable for the line voltage: I amp slow-blow for 100V ac and 120V ac,
or
I,:
amp for 2'20V ac and 240V ac. (An extra fuse may bl:: installed in the alternate fuse holder.
XF: which is located internally on the AIO Power Supply Assembly.) Slide the clear plastic window
back over the fuse and pc wafer portion of the fuse holder assembly and insert the power cable, WI8,
in the receptacle. Additionally, the Receiver should be grounded by attaching a suitable ground wire
to the rear panel GROUND lug before the power cable, WI8, is attached.
.
Th:.: Receiver is normally shipped from the factory configured for operation with a 120
volt.
= .
)%,48 to 420 Hz ac source. For receiver operation with a 240 volt source, the Receiver
must be re-configured as follows:
1. Disconnect the Receiver from all system equipment and remove the power cord.
On the power input connector assembly AIOll: Slide the transparent protective
cover to the left to expose the fuse; remove the fuse; remove the printed circuit
wafer. and then replace the wafer with the required nominal operating voltage
visible; replace the fuse and restore the protective cover to its original position and
connect or re-connect the receiver system connections.
3. The unit is now ready for operation from the selected line voltage,
±
10%.
2-18
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