Front Panel Facilities - Pioneer SX-727 Service Manual

Am/fm stereo receiver
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2. FRONT PANEL FACILITIES
SPEAKERS SWITCH-
A combination of the power ON/OFF switch and the speaker system
selector switch
POWER OFF , . Theequipment is off.
A
.The speaker systems plugged into the A speaker
sockets is in operation.
SPKR OFF. . . . Ail speaker systems off.
Useful for listening through headphones.
6
.The speaker systems plugged into the B speaker
sockets is in operation.
C
.The speaker systems plugged into the C speaker
sockets is in operation.
A + 8.Both speaker systems A and B are energized.
A + C.Both speaker systems A and C are energized.
PHONES JACK--
Use this to plug in stereo headphones
A full selection of high-performance headphones is available from
Pioneer.
BASS & TREBLE CONTROLS --
Used for adjusting bass and treble.
Clockwise (counterclockwise! turning of these controls from the FUAT
position will boost (diminish! tone. Also, only the left (right) channel
can be adjusted by turning the front (rear) part while the other part is
being held.
Adjustment of both channels or only the left channel is made by click-
stops. For normal listening, set it to the FlAT position.
FILTER SWITCHES-
LOW:
Setting this switch to ON will eliminate low noises such as
record rumble, hum. or other interference. The switch is
normally set to OFF unless the filter is required.
HIGH:
Setting this switch to ON will eliminate high noises, such as
record scratch, static noise from fluorescent lamps, or other
interference. The switch is normally set to OFF unless the
filter is required.
Note that the switches are ON when pushed.
BALANCE CONTROL-
This knob is used for adjusting the stereo balance. When the volume of
the right channel speaker is smaller, turn the knob clockwise toward
RIGHT: when left channel volume is smaller, turn the knob counter¬
clockwise toward LEFT. For normal listening, set it to the NORM posi¬
tron
FM MUTING SWITCH-
This switch is used to suppress noise between FM stations. In a fringe
area, however, this switch should be kept OFF because it may suppress
the desired station signal at the same time. Note that this switch is OFF
when it is pushed, and ON when released.
AUDIO MUTING SWITCH-
In position ON (switch pushed), the volume will be attenuated by 20d8.
Push once again to restore the volume to its former level.
-SIGNAL METER
This meter indicates the optimum tuning point for AM and FM stations.
When the needle deflects all the way to the right, the station h3S been
properly tuned in.
•FM TUNING METER
When tuning in an FM mono or FM stereo broadcast, this meter should:
be used to 'make the tuning perfect. After the desired station has been
properly tuned in with the SIGNAL METER, adjust the TUNING;:,:
KNOB so that the needle comes to the center.
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VOLUME CONTROL..
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The volume increases when this; knob is turned clockwise.
LOUDNESS SWITCH-
When listening, at low volume level, set this switch ON position. This
emphasizes the extreme ends of the sound spectrum, giving a more
natural sound contour.
TAPE MONITOR SWITCHES (1 and 2)-
These switches are set to ON for monitoring of a recording in progress
or playback of recorded tapes with tape decks.
Note that the switches are ON when pushed.
1 This switch is set to ON for using a tape deck plugged into TAPE 1
MON jacks and TAPE 1 REC jacks or TAPE REC/R.B. connector.
2 This switch is set to ON for using a" tape deck plugged into TAPE 2
MON jacks and TAPE 2 REC jacks.
NOTE:
For phonograph records, or broadcasts, leave these switches in OFF
position.
It
the switches are set to ON. no sound witl be heard
3
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