Marantz 4415 - ADJUSTMENTS; AUDIO ADJUSTMENT; AUTOMATIC VOLTAGE REGULATOR ADJUSTMENT

11.
AUDIO
ADJUSTMENT
1.
Connect
a
VTVM
to
J614
(+)
and
J620
(—)
and
adjust
the
trimming
resistor
R629
until
the
VTVM
reads
10mV
DC.
For
the
other
channel
connect
the
VTVM
to
J615
(+)
and
J621
(—)
and
adjust
the
R630
for
the
same
reading.
2.
Connect
a
oscilloscope
across
the
SPEAKER
terminals.
Apply
an
audio
signal
of
1
KHz
to
the
AUX
jacks
and
increase
the
audio
signal
until
the
audio
output
on
the
scope
begin
to
start
clipping.
Adjust
the
trimming
resistor
R617
for
equal
and
symmetrical
clipping.
For
the
other
channel!
adjust
the
R618.
:
12.
AUTOMATIC
VOLTAGE
REGULATOR
ADJUSTMENT
Connect
a
VTVM
to
J801
(+)
and
J808
(—)
and
adjust
R801
until
the
VTVM
reads
35.0V
under
no
signal
condition.
START 1
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