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Marantz CD-400B Manual

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I
OPERATION
NOTES
,FUNCTIONAL
QESCRIPTION
1. Separation
Adjustment
In
the
CD-4 record two
sigAals
are superimposed
Once
the
separation controls are set
they
on
each wall
of
the
same groove. One
is
the
SUM
should
not
need readjustment until
the
car-
SIGNAL
LF
+
La
(or
RF
+
Rs).
The
other
is
a
tridge
and/or
stylus
is
replaced.
30
KHz carrier modulated itl frequency by
the
2.
Anti-Skating
DIFFERENCE SIGNAL
LF
-
L8
(or
RF
.:.
Rs).
For
optimum
results
with
the
CD-400B,
the
Referring
to
the
block diagram of Figure 5,
the
anti-skating force
on
the
turntable
should
be
compositesignal picked up
b¥
the
phone
cartridge
carefully adjusted in, accordance with
the
~,
is
first passed through a circuit which provides
manufacturer's instructions.
standard RIAA equalization. Its
output
signal
is
3. Cartridges
split into
two
different paths: One
path
goes
Only a magnetic cartridge designed for CD-4
through a Low Pass filter
that
lets only
the
sum
reproduction will provide usable playback re-
signal through
to
the
·mixing circuit while stop-
sults.
The
cartridge must be
mounted
per-
ping
the
carrier. A separation
adjustmentis
included
pendicularto
the
record surface. See Figure 4. '
in
this path
to
compensate for
the
variation
:in
The stylus must be
kept
clean. Consult
your
output
level from different cartri.dges.
The
bther
dealer
for
cleaning accessories.
path
.takes
the
signal through a
High
Pass Filter
4. Turntable Leads
which blocks
the
sum
signal,
but
allows
the
Only coaxial
audio
cables designed for CD-4
modulated high frequency carrier
-to
be presented
use should be used. Consult
your
dealer for
the
to
the
FM
Detector,
after
amplification
to
proper type.
the
proper level. There,
the
difference signal
is
recovered (detected) by means
of
a low distortion
5.
TV Interference
A TV
set
located near
the
CDA
record player
Phase Locked Loop circuit.
The
30
kHz level
is
may interfere with playback
of
CD-4 discs.
automatically adjusted
to
suit
different
types
of
If
this should occur, either
turn
off
the
TV
or
cartridges
and
set-up conditions.
move
the
record player away from
the
TV.
The Low Pass filter
that
follows
the
FM
detector
6. Record Care
suppresses
any
vestiges of
the
high frequency
CDA records require cleanliness. Keep
them
carrier, leaving only
the
original difference signal.
away from dust, dirt and cigarette smoke.
fn
recording,
the
frequency response
of
the
differ-
Clean
them
with a high quality record clean- ence signal
is
modified
to
improve signal-to-noise
ing device before playing and before storing.
ratio and crosstalk. The circuits labelled De-
Do
not
use solvents or water because
they
will
emphasis and
AN
RS
in
the
CD-400B block diagram
increase noise
on
the
discs.
WRONG
\
\
..
\
I
,--
I
I
-,
I
V
,
\
I
J RECORD
SURFACE
--
-,
.
are intended
to
restore
the
original response
of
Figure
4.
Cartridge
Mounting
RIGHT
r---WRONG
I
I
CARTRI.DGE
~
I
RECORD
__
..
SURFACE
--:-;-""'-_J
SU
RECORO
AFACE .
90°
a..-_~
… 9 …


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