Marantz SR1100L - Alignment Procedures; FM Alignment Procedures

3. ALIGNMENT
PROCEDURES
A dummy
resistor
of
47 k-ohms
must
be connected across the tuner output terminals
before alignment.
3.1
FM Alignment Procedures
(Function
switch in the
"FM"
position)
Flvl RF Alignment
3,3
Multiplex Alignment Procedures
(Function
switch in
the
"FM"
position/Mode
switch in the
"STEREO"
position)
St€p
Signal So0rc6
Conneclion
Signal
Indicttor
Connoction
s€(
rhe
oigitll
Roadout
Frrquonry
Adrurt
I
RF
generalor
to
terminals through
matching network
(300
ohms, balanced)
lMaintain
RF lev6l
below limit.)
87.4
MHz
channel output
Tuning capacitor
minimum closed.
L106
for maximum
outpui.
2 108.2 MHz
Tuning cepacitor C
118lor
maximum
outpur,
90 lvlHz 90 lvlHz
L101,
L103
for maximum
4 106 MHz 106
M
Hz
ANT.
RF. TRIM. CAP.
tor
maximum output,
5
Repeat
steps
1
to
4.
6 Check overall response curve and repeat above steps as
necessarv
to obtain
maximum
sensirivaty,
1 No signal
"0"
center
meter
or DC current
merer in 100pA
J2O1
and
J2O2
L2O1
primery
core
so
thal
the meter indacales
its center or
may read
"O".
(RED
core)
8
RF
g€nerator
1mV
{or
300pV, only
Step
10)
outpul lo
Flvl
antenna
terminals th.ough
matching
network,
{300
ohms, balanced)
98 MHz
Distortion meter
to
L or R channel
ourpur
98 MHz
L201 Secondary
core
(BLK)
for minimum
distor-
10
98 lvtHz 98 MHz
R219 so that
sign6l strength
LED
may light 5
points.
3.2 Muting Circuit Alignment
Stop
Signal Source
Connection
Sign.l
lrdicator
Connection
Set ths
Digiral
R€adoul FrGqu€ncy
Adiun
RF
generator
12.5pV
output to
FM
antenna
terminals through
matching network
(30O
ohrns,
balancedl
98 MHz
channel output
98
MHz
F.213
tor 12.5pV
threshold
level.
(During
this
adjustment
turn the
muting
pushswitch
"oN".)
Stop
Sign.l Source
Connoction
Signal
Indicator
Connoclion
$t
rha oigit.l
R@doui
Frequency
Adjust
RF
generator
to Flvl
antenna termrnals
through matching
network
(300
ohms,
balanced),
with
1mV
Fl!4
stereo simulator
RF level
and 1 0096
modulation
{pilor
9%)
Frequency
counter
to J301
98 MHz
R304
so that
Frequency
counter
may
preciselY
re6d
76 kHz.
2
Stereo,
left
(1,00O
Hz)
VTVM
to right
R331
lor maximum
outpul and
same separatlon
in both channels.
Stereo, right
{1,0O0
Hz) channel output
Pilot
only
output
98 MHz
R307
tor minimum
output and
same
output in
both channels,