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Marantz SR620 - Page 7

Marantz SR620
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4.
LW
Local
Oscillator
Alignment
(Selector
switch
in
the
“LW”
position)
SR620L/SR520L
Signal
Source
Signal
Indicator
Set the
Digital
Connection
Frequency
Connection
Readout
Frequency
Adjust:
DC
voltmeter
in
12V
range
to
153
kHz
LAO2
for
3.0V.
(J102)
5.
LW
RF
Alignment
(Selector
switch
in
the
“LW”
position}
SR620L/SR520L
Signal
Source
Signal
Indicator
Set
the
Digital
.
5
Adjust:
Connection
Frequency
Connection
Readout
Frequency
;
Apply
the
signal!
to
the
H
kKH
CAO5-2
for
maximum
AM
loop
antenna
from
the
S20
ie
VTVM
to
Lor
R
B20'kHe
output.
RF
generator
using
the
test
channei
output
~
=
loop.
170
kHz
($102)
170
kHz
LA0O4
for
maximum
As
per
the
Figure
1.
output.
Repeat
steps
1
and
2
as
necessary
to
obtain
maximum
sensitivity.
6.
Main
Amp.
Aignment
(Function
switch
in
the
“Aux"
position)
Connect
the
digital
voltmeter
to
the
Speaker
terminals
(no-load
condition)
and
adjust
R709
(L.
ch.)
and
R710
(R.
ch.)
for
an
indication
of
0
V.
(Volume
turned
to
minimum.)
Test
Loop
AM
Loop
Antenna
©
2
60cm
=
Figure
1.
Application
of
AM
Signal

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