McIntosh MR 71, Руководство пользователя

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ADJUSTMENTS
MUTING THRESHOLD
The MR 71 ultrasonic muting circuit sup-
presses all noise between stations. It sup-
presses all weaker stations not strong
enough to override the background noise.
The muting threshold setting determines
the strength of the signal which can be heard
with muting in operation. The muting thresh-
old is carefully adjusted to optimum at the
factory using precision test instruments.
Casual adjustment of the muting threshold
is not recommended.
If it is necessary to adjust the muting
threshold, use the MUTING ADJ control to
the RIGHT (clockwise) to lower the muting
threshold. This allows weaker stations to
be heard with the MUTING IN SETTING.
Turn the MUTING ADJ control to the LEFT
(counterclockwise) to raise the muting thresh-
old. This allows only the more powerful
stations to be heard with the MUTING IN
setting.
DIAL PANEL LIGHT
Adjust the brightness of the dial panel
lights by means of the PANEL LIGHT switch
on the tuner back panel. Set the switch to
BRIGHT for maximum panel light. Set the
switch to DIM for less dial light and extended
lamp life.
OUTPUT ADJUST
The dual concentric OUTPUT ADJ controls
(on the tuner back panel) adjust the output
volume level of the left hand pair of AUDIO
OUTPUT JACKS. The center shaft of the
control adjusts the left channel output. The
outer sleeve of the control adjusts the right
channel output.
Before making the adjustment, connect
the left hand AUDIO OUTPUT jacks to the
tuner inputs of the control preamplifier. Set
the preamplifier selector to phono. Set the
volume control to normal listening level for
a stereo disc recording. Switch the preampli-
fier selector back to tuner. Set the MR 71
MODE SELECTOR to MONO. Tune in a local
station. Tune the OUTPUT ADJ controls
until the levels of both channels are equal,
and equal to the volume level of the phono
recording. You can now switch the preampli-
fier selector from the MR 71 to other pro-
gram sources without readjusting the main
volume control.
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