Spectrum Analyzer - Pioneer SA-1520 Service Manual

SA-1520, SA-1520S
(©) FUNCTION indicators
These indicators light to show the setting of FUNCTION switches.
@)MUTING switch
Use to temporarily cut out all audio signals.
When this function is ON, sounds will be cut off (VOLUME indicator
will flash).
When turned OFF, the sound returns to its previous level. The muting
ON/OFF function can also be operated by the accessory remote control
unit.
VOLUME control/indicator
Use to adjust sound volume.
When operated by remote control, this control will rotate with the knob
indicator flashing.
Adjustment can also be performed with the accessory remote control
unit.
(8) BALANCE control
Should normally be left in the center position. Adjust balance if the sound
is louder from one of the speakers.|f the right side is louder, turn toward
the LEFT position, and if the left side is louder, turn toward the RIGHT
position.
GRAPHIC EQUALIZER controls
These controls can be used to emphasize or de-emphasize sounds in
the frequency bands 100 Hz, 330 Hz, 1 kHz, 3.3 kHz, and lO kHz, thus
allowing you to control tone quality. The center position of each control
is the normal (flat) setting. When raised above the center position, the
control frequency band is emphasized; when lowered, the band is de-
emphasized.
(1) EQUALIZER ON/OFF switch/indicators
When this switch is pressed, the GRAPHIC EQUALIZER control's
indicators turn on, and its functions become operative.
When pressed once again. the indicators are turned off. Use this switch
in the following manner:
[ON] : When using the equalizer to add sound compensation while
performing program sources, and playing back and/or recording
results.
[OFF] : When not using the equalizer, but playing back or recording
program sources without compensation.
NOTE:
Equalizer ON/OFF indication is provided by a light on the equalizer switch
itself on U.S. and Canadian models, or by control knob indicators on
other models.
30
(22) SPECTRUM ANALYZER
This display shows the condition of sound signals compensated with
the graphic equalizer controls.
(Because the level indicator is connected to the input side, the indication
does not change when the VOLUME control is turned.)
43) MULTI-ROOM indicator
This indicator is always lit, but if you connect an MR-100 optional Multi-
Room remote control unit, it will flash when the MR-100 is receiving
a remote control signal.
STANDBY/SLEEP indicator
¢ This indicator flashes when the accessory remote control unit is used
to turn SLEEP key. When SLEEP key is ON, the indicator will flash.
(Initially it will flash slowly, then gradually become faster.)
Sixty minutes after the sleep timer is turned ON, the power switch
will be turned to STANDBY automatically.
* This indicator lights when the accessory remote control unit or this
unit is used to turn POWER key.
(1) MIC jack
Connects to a six millimeter microphone plug.
48) MIC LEVEL control
Use to adjust microphone input level.
NOTE:
18) and (8) do not exist on U.S. and Canadian models.
This component features a built-in microcomputer which will recall
the last-set positions of the following switches for up to about
several days after the power cord is disconnected. As a result, when
the power is turned ON again, the previously set positions will be
recalled automatically:
* MUTING switch
e FUNCTION switch
e EQUALIZER ON/OFF switch
When the unit is not used for more than several days, the memorized
setting positions will be erased, and returned to the following
settings:
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* FUNCTION switches ..............
* EQUALIZER ON/OFF switch