Harman Kardon AVR 635 Owner's Manual page 9

Rear Panel Connections
Preamp Outputs: Connect these jacks to
an optional, external power amplifier for appli-
cations where higher power is desired.
Surround Back/Multiroom Speaker
Outputs: These speaker terminals are normally
used to power the surround back left/surround
back right speakers in a 7.1 channel system.
However, they may also be used to power the
speakers in a second zone, which will receive the
output selected for a multiroom system.
To change the output fed to these terminals
from the default of the Surround Back speakers
to the Multiroom Output, you must change a
setting in the Multiroom Menu of the OSD sys-
tem. See page 42 for more information on con-
figuring this speaker output. In normal surround
system use, the brown and black terminals are
the surround back left channel positive (+) and
negative (–) connections and the tan and black
terminals are the surround back right positive
(+) and negative (–) terminals.
For multiroom use, connect the brown and black
SBL terminals to the red and black connections
on the left remote zone speaker and connect the
tan and black SBR terminals to the red and black
terminals on the right remote zone speaker.
RS-232 Port: This jack may be used to con-
trol the AVR 635 over a bi-directional RS-232
serial control link to a compatible computer or
programmable remote control system. Due to
the complexity of programming RS-232 com-
mands we strongly recommend that connections
to this port for control purposes be made by a
trained and qualified technician. This jack may
also link to a compatible computer to upgrade
the software and operating system of the
AVR 635 when appropriate upgrades are
available.
Fan Vents: These ventilation holes are the
output of the AVR's airflow system. To ensure
proper operation of the unit and to avoid possi-
ble damage to delicate surfaces, make certain
that these holes are not blocked and that there
is at least three inches of open space between
the vent holes and any wooden or fabric surface.
DVD Component Video Inputs: These
inputs may be used with any source device
equipped with analog Y/Pr/Pb or RGB compo-
nent video outputs. The factory default is for
these jacks to be a linked to the DVD input, but
you may change the setting at any time through
the menu. See page 15 for
more information on configuring the component
video inputs.
Remote IR Carrier Output: The output of
this jack is the full signal received at the
Remote Sensor Window or input through
the Remote IR Input including the carrier
frequency that is removed from signals at the
Remote IR Output . Use this output to
extend IR remote signals to the input of
compatible products by direct connection or
through the use of optional, external IR
"blasters". If you are in doubt as to which of the
two IR Output jacks to use, we recommend that
you consult with your dealer or installer, or check
with the manufacturer of the external equipment
you wish to control.
9
REAR PANEL CONNECTIONS