Front Panel Facilities - Onkyo A-8780 Service Manual

Integrated stereo amplifier
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FRONT PANEL FACILITLES
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Power Button (POWER)
Press this button to switch the on/off status of the power supply
and the AC outlets on the rear pane!. Power can also be turned
on by using the remote control POWER button. An orange band
over the power button indicates power is on.
Remote
Control! Sensor
This receives signals sent from RC-180S remote control
transmitter.
MUTING
—°cc/STAND-BY
Indicator
The indicator blinks on and off and the sound is muted when
the remote control transmitter MUTING — ce button is pressed.
Muting Switch (MUTING)
When this switch is set to the —-20dB position, the volume level
is reduced to one-tenth of the level set by the VOLUME control.
Mode Selector Switch (MODE)
STEREO ( mf):
Position for normal stereo listening.
MONO (==)
: Both right and left channel signals are sent
to each speaker.
Position for listening to
monaural recordings or when adjusting the
BALANCE control.
Volume
Control
Knob (VOLUME)
This controls volume. Turning it clockwise increases volume.
When controlling with the remote control transmitter, pressing
"UP" and "DOWN"
increases and decreases volume respec-
tively. This control employs the system of simultaneous changes
in volume and boost characteristics.
Input Selector
Buttons and Indicators (INPUT SELEC-
TOR)
These buttons are used to select the desired program source.
Pressing one releases the previously pressed button, so be sure
to press only one button at a time.
An indicator shows which
program has been selected.
TAPE-2
:Tape.deck connected to the TAPE-2 jacks.
TAPE-1
: Tape deck connected to the TAPE-1 jacks.
TUNER _ : Tuner connected to the TUNER jacks.
cD
: Compact disc player connected to the CD jacks.
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DAT
: Tape deck connected to the DAT jacks.
AUX-1, 2 : Additional audio component connected to the
AUX-1
or 2 jacks.
PHONO
: Turntable connected to the PHONO jacks.
Speaker Selector Switch (SPEAKERS)
This unit can drive two different speaker systems at once. Use
this selector to activate either or both speaker systems con-
nected to the rear panel speaker terminals. In the OFF position,
sound is heard only through the headphones.
OFF
: All speakers off—only headphones operate.
A
: Speakers A
B
: Speakers B
A+B
: Both speaker systems A and B.
Headphone Jack (PHONES)
Stereo headphones with a standard binaural pug can be
connected here.
Bass Control
Knob (BASS)
Turn right to boost or left to attenuate bass. Inthe DEFEAT
position, the BASS tone control circuitry is completely by-
passed.
Treble Contro}
Knob (TREBLE)
Turn right to boost or Jeft to attenuate treble. hh the DEFEAT
position, the TREBLE tone controi circuitry is tommpletely by-
passed. When turned to the extreme left (-10) the TREBLE
contro! acts as a high cut filter to eliminate scntches, hissing
and other high frequency noise.
About the Variable Tone Boosting System
This unit is designed to gradually reduce the effet of the tone
controls (BASS and TREBLE) when the VOLUM
exceeds a
certain level. The variable boosting system gradull y reduces
the boosting effect of the BASS and TREBLE conrols when
one or both of these controls is turned beyond (tithe right of)
the center defeat position and the VOLUME
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is turned
beyond the center position. When the VOLUME
istu rned all the
way up, the frequency response will be flat again. Ih e VOLUME
settings below the center position have no effect o t he DIRECT
TONE controls. Also, BASS and TREBLE control strings below
(to the left of) the center DEFEAT position are n¢ altered by
the volume level.

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