Fm Muting Switch; Volume; Dolby Switch; Record Level (L) (R) - Marantz 4270 Instructions Manual

FM MUTING SWITCH
When tuning to FM broadcasts with the FM MUT ­
ING Switch in its "in" position, the muting circuit
will eliminate inter-station noise. To prevent
muting of very weak stations along with the
noise, the muting function may be turned off by
releasing the FM MUTING pushswitch to the
"out" position.
VOLUME
This control regulates volume of all four channels
simultaneously.
DOLBY SWITCH
This switch sets the Dolby noise-reduction circuit
for record or playback and also switches the
Meter Mode from AM or FM SIGNAL-STR ENGTH
to DOLBY CAL LEVEL, or vice-versa. With the
DOLBY Switch placed in "OFF" position, the
Meter will be used as a SIGNAL-STRENGTH
Meter; in all other positions, as a DOLBY CAL
LEVEL METER.
DOLBY FM: This position is used for listening
to Dolbyized FM broadcasts. The Dolby FM
level has been pre-adjusted at the factory.
PLAY: This position is used to play back a
Dolbyized source (except FM).
OFF: With this position, the Dolby circuit
IS
by-passed and the input signals are directly
applied to both TAPE MONITOR OUT jacks
and amplifiers.
RECORD I: For making a Dolbyized recording
from an in-coming "flat" (non-Dolbyized) signal.
When the MONITOR Switch is in the SOURCE
(out) position, the "flat" signal will be heard.
When the MONITOR Switch is in the TAPE (in)
position, the Dolbyized signal from the tape will
be heard.
RECORD II: For making a "flat" (non-Dolbviz ­
ed) record ing from an in-coming Dolby ized signal.
Regardless of the position of the MONITOR
SWitch, a "flat" signal will be heard.
Refer to the Dolby Mode Chart on page 16.
RECORD LEVEL (L) (R)
These knobs control the record level of the signals
to be recorded through the Dolby unit. Adjust
the knobs so that the Level Meter pointers of
the tape recorder do not exceed the OVU level.
PLAY CAL. (L) (R)
These knobs adjust the playback outputs from a
tape deck to the proper Dolby level.
400Hz TONE SWITCH
This is used for calibration of the record input
level of the tape deck. When the switch is
depressed, the built-in oscillator operates and a
sine wave signal output of 580mV will be applied
to the four TAPE MOI\IITOR OUT jacks.
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