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OPERATING THE 430
POWER
Familiarize yourself with the front panel
controls. There are six knobs and nine
pushbuttons controlling all the features of
the receiver. Each of the controls per-
forms a different function, but instead of
discussing each control separately, we
will illustrate how they work together to
control the reproduction of sound through
the 430. Find the VOLUME control and
turn it down (counterclockwise). Push the
POWER switch to turn the 430 on.
Playing Records with the 430
Three basic controls are used to play
back disc recordings through the 430:
FUNCTION, VOLUME, and BALANCE.
Make the following adjustments to these
controls and the SPEAKERS switch after
activating your turntable or record
changer:
[1] SPEAKERS 1
[2] FUNCTION
[3] BALANCE
[4] VOLUME
-
On (Push "in")
-
"Phono" position
-
Neutral position
(12 o'clock)
-Advance
(clockwise) to
,comfortable
loudness level.
You should now hear sound from the
disc through your system. To increase or
decrease the loudness of the playback,
the VOLUME control may be advanced
(clockwise) or turned down (counter-
clockwise). The BALANCE control if
turned counterclockwise will shift the
loudness to the left speaker by attenu-
ating (reducing the loudness of) the right
speaker. When turned in the other
direction, it has the opposite effect. The
SPEAKER 1 pushbutton connects or
defeats the loudspeakers connected to
SPEAKER SYSTEM 1, [If you have speak-
ers connected to SPEAKER SYSTEM 2,
they are controlled by the SPEAKERS 2
pushbutton on the front panel].
3
Now that you're listening to sound you
can check the phasing of your speakers.
While playing a stereo disc, depress the
MONO pushbutton switch and position
yourself midway between the left and
right spBaker systems, facing them. The
source of sound should now appear to
be coming from a point directly ahead of
you, centered between the two speakers.
If the sound has no clear-cut, centered
image, you did not connect the speaker
systems correctly. Push the POWER
switch off. Recheck your connections
both at the rear of the 430 and at the
terminals of both loudspeakers. If you are
using two dissimilar loudspeakers, it is
possible that their internal connections
have reverse polarity, causing them to be
out of phase. Reverse the connections
made at the speaker or the receiver (NOT
BOTH) for one channel ONLY. The
system should now be in phase. Push the
MONO switch to return it to stereo
position.
The phasing test can be done with any
program material, but disc recordings
are the recommended method. Stereo
material is suggested to make the effect
more obvious.
If you do not get sound at this point,
check the control positions given above.
Also, be sure the TAPE MONITOR switch
is in the "out" position. Leave the volume
control at the 9 o'clock position while
you are adjusting the other controls. If
you sti II get no sound, check the back
panel connections for PHONO, then
check the turntable itself. Note: When-
ever you check connections at the back
panel, always push the POWER switch
off.
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2
If, at average listening levels, you hear
an objectionable (i.e. easily audible)
amount of hum, try disconnecting the
ground wire from the turntable to the 430.
Some turntable/cartridge combinations
actually produce less hum this way.
Another source of hum is inadequate
seating of the phono signal cables in the
receptacles of the 430. Check this
thoroughly.
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