Marantz 6300 - 3. ADJUSTMENTS; 3-1. AUTOMATIC SHUT-OFF CHECK AND ADJUSTMENT; 3-2. TONE ARM ADJUSTMENTS

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3. ADJUSTMENTS
3-1.
AUTOMATIC
SHUT-OFF
CHECK
AND
ADJUST-
MENT
1. AUTOMATIC SHUT-OFF CHECK
In
the
AUTO
mode,
if
the
tone
arm
does
not
automatically
lift at the end of a record, check for the following;
A. The tone arm lifter should move downward when
CUE-DOWN is pressed.
B.
MAUAL/AUTO
switch
must
be
in
the
AUTO
position.
C.
The
voltage
measured
between
J805
and
J813
should
be
approximately
1.7
V
when
HO002
is
turned
‘‘on”’
by
the
light
emitted
from
LN25.
~
D.
The
voltage
measured
between
J811
and
J813
should
be
1.5 V or less with HOO2 conducting.
2. AUTOMATIC SHUT-OFF ADJUSTMENT
Triggering
of
the
Automatic
Shut-off
should
take
place
at
the
end
of
a
record
as
the
tone
arm
approaches
the
center
spindle.
To
adjust
the
shut-off
triggering,
insert
a
flat
blade
screwdriver
into
the
hole
located
at
the
rear
of
the
turntable
base.
(refer
to
Cabinet-Rear
View,
section
6-2
for
exact
location.)
To
adjust
for
earlier
triggering
turn
the
screw
counterclock-
wise.
To
adjust
for
later
triggering
(nearer
the
center
spindle)
turn
the
screw
clockwise.
3-2. TONE ARM ADJUSTMENTS
After
a
cartridge
is
mounted,
several
adjustments
must
be
made
to
optimize
turntable
performance.
First,
the
stylus
overhang
must
bé
adjusted;
then
the
tone
arm
balance,
lateral
balance,
tracking
force,
and
anti-skating
force.
1. STYLUS OVERHANG
The
Model
6300
Turntable
is
designed
to
operate
with
the
least
distortion
when
the
tip
of
the
stylus
is
at
a
particular
distance
from
the
tone
arm
pivot.
For
this
reason,
the
cartridge
shell
is
slotted,
allowing
the
cartridge
with
its
mounting
screws
to
be
slid
toward
or
away
from
the
pivot
point.
This,
in
effect,
changes
the
radius
of
the
arc
described
by
the
stylus.
Supplied
in
the
accessory
kit
is
a
45
RPM
spindle
adaptor.
The
adaptor
has
been
specially
marked
with
an
arrow
and
a
dot
to
aid
you
in
setting
the
proper
stylus
overhang.
Proceed
as
follows:
A.
With
the
turntable
stopped,
place
the
45
RPM
adaptor
on
the
center
spindle
with
the
arrow
pointing
to
the
rear
of
the
turntable.
B.
Remove
the
arm
from
its
arm
rest
and
remove
the
protective
cover
(if
any)
from
the
stylus.
C.
Place
the
stylus
tip
over
the
45
RPM
adaptor
and
adjust
the
cartridge
so
that
the
stylus
tip
will
be
perfectly
centered
in
the
dot.
D.
Make
sure
that
the
cartridge
is
installed
straight.
The
sides
of
the
cartridge
must
remain
parallel
to
the
sides
of
the
sheil.
E. Snug up the mounting screws.
2.
VERTICAL
TONE
ARM
BALANCE
The
adjustable
counterweight
at
the
end
of
the
tone
arm
establishes
tone
arm
balance
and
stylus
tracking
force.
Since
no
two
types
of
cartridges
weigh
the
same,
the
balance
and
tracking
force
must
be
adjusted
for
each
cartridge
being
used.
Figure
3-2-1.
Stylus
Overhang
Adjustment
Figure
3-2-2.
Tone
Arm
Balance
Adju
stment
3