Marantz SR800 - Page 5

*
A
dummy
resistor
of
47
kohms
must
be
connected
across
the
tape
output
terminals
before
alignment.
3. FM ALIGNMENT PROCEDURES
(Selector switch in the “FM” position)
Signa! Source
Connection
Signal
Frequency
indicator
Connection
Set Dial
Pointer to:
Adjust:
3.1 FM IF ALIGNMENT
Oscilloscope to
L106 for maximum and
Sweep
generator
to
10.7
MHz
JVO2
(TAPE
OUT)
: }
symmetric
response.
4
market
at
Quiet
point
on
point
()
through
10.6.
10.7
and
nee
.
6,10.7
a
and.
i
5pF
capacitor
FOS
MIE
|
Oscilloscope
to
L201
for
maximum
and
:
|
JVO2
(TAPE
OUT)
symmetric
response.
Repeat
steps
1 and
2.
3.2
FM
RF
ALIGNMENT
i
L105
for
maximum
87.4
MHz
87.4
MHz
with
i
tuning
gang
closed.
Output.
[i
RF
generator
to
.
FM
antenna
108.
2
MHz
108.2
MHz
with
C114
for
maximum
terminals @® through
matching network
VTVM to LorR
channel output
(JVO02)
tuning gang open.
output.
L101, L103 for
(300 ohms, balanced)
90 MHz maximum output.
Maintain
RF
level
oe
below limit.) (J036) Ant. RF trimmer for
106 MHz
Repeat steps 1 to 4.
maximum output.
Check
overall
response
curve
and
repeat
above
steps
as
necessary
to
obtain
maximum
sensitivity.
L201 lower core for FM
No
connection
No
signal
~
-_
TENG
terete
pointer indicated its
center.
Distortion
meter
to
L201
(primary
core
upper)
L
or
R
channe!
out-
for
minimum
distortion.
FM generator 1 mV put (JVO2)
output to FM antenna
terminals ® through 98 MHz 98 MHz
matching network
(300 ohms, balanced)
(JO36)
3.3 MUTING CIRCUIT ALIGNMENT
RF
generator
12.5uV
[R207
for
12.5uV
output
to
FM
antenna
VTVM
to
Rort
threshold
level.
{During
terminals
@
through
98
MHz
channel
output
98
MHz
the
adjustment
turn
matching
network
(JVO2)
the
FM
MUTING
push-
(300
ohms,
balanced)
(JO36)
switch
‘“‘ON").