Adcom GFP-750 Owner's Manual page 4

1.3. Product Features
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Stereo/Reverse/Mono Switch
This switch is used to change the polarity of the input signal in relation to the output signal. The
stereo setting allows normal playback of the input signal. The reverse setting Inverts the phase of the
input signal. The mono setting combines both channels for a monaural input signal or where
speaker placement does not accommodate stereo playback.
Input Selection
The input selection knob has a digital interface that senses movement of the knob. The knob appears to
turn freely as the interface detects the direction the knob is being turned and indexes through the input
sources accordingly. To go from
aux 2 to tuner or
from
tuner \o aux 2,
you must index back through the
other input sources.
Passive
This features allows the active gain stages of the preamp to be bypassed.
(A slight drop in volume level is
expected when this feature is engaged.)
This feature has no effect when the
processor
feature is en¬
gaged.
Power On/Off
The
GFP-750
is turned on by pressing either the remote control
power
button or toggling the front
panel power switch. The LED above the power switch will come on indicating the unit is on. (The
power status LED will glow slightly dimmer when the unit is muted.)
Processor Switch
Engages the processor loop when activated. See @ for further information.
Balance Control
The
GFP-750
balance control feature provides finer balance adjustment allowing for greater balance
accuracy and will not entirely mute either channel.
Infrared Remote Control Sensor Lens
This lens protects the infrared receiver which receives commands from the remote control. The pathway
between the lens and remote control must be free of obstructions for the remote control to operate the
GFP-750.
Volume Control
The front panel
volume
control knob is motorized. It may be adjusted either by hand or by the
volume
buttons on the remote control. The volume knob's groove always indicates the present volume level. The
volume
control knob may be used to reduce the volume level while the
GFP-750
is muted without deac¬
tivating the mute feature.
Mute
The
GFP-750's
mute feature is engaged by pressing the
mute
button on the remote control. This feature
fully mutes the outputs. To deactivate the mute feature, press the
mute
button again or either of the two
volume
buttons on the remote control.
(Turning the front panel volume knob will not deactivate the mute
feature.)
Balanced CD Inputs
Before using the balanced CD inputs, it is necessary to remove the gold jumpers located between pins 1
and 3 in both connectors. (See the figure to the right.) When switching from balanced CD inputs to
unbalanced CD inputs, you must replace the jumpers between pins 1 and 3 as shown.
|l DO NOT USE BOTH BALANCED AND UNBALANCED CD INPUTS AT THE SAME Time. l| _
Gold Jumpers ^
When using the unbalanced
CD
inputs, jumpers must be installed to short pins
1
and
3 of the to
balanced input jacks. ^
Unbalanced Stereo Inputs gold jumpers
Connect the various outputs from each signal source to these unbalanced stereo inputs.
Do
not connect both the unbalanced and balanced CD inputs at the same time.
See the section
labeled
CONNECTIONS
for further information regarding these inputs.
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