NAD 300 - FM RF AND IF ALIGNMENT

FM
RF
AND
IF
ALIGNMENT
Signa|generatoroutputshouldbenohigherthannecessarytoobtainanoutputreading.
Set
Selector
switch
to
FM'
Signal
Generator
deviation:
75
kHz
REMARKS
SIGNAL
GENERATOR
COUPLI
NG
SIGNAL
GENERATOR
FREOUENCY
RECEIVER
DIAL
SETTING
tNDTCATOR i
AOlUsrn/lerur
Connect
to
FM
Antenna
Terminal
through
FM
DummY
Antenna
(300sl)
Fig'
2
90
MHz
(400
Hz.
Mod.)
Adjust
for
maximum
reading
on
AC
Voltmeter
Same
as
Step
1
AC
Voltmeter
connected
to
TAPE
OUT
jack
Same
as
Step
1
1104
(FM
OSC
Coil)
L1 01
(FM
ANT
Coil)
L102,
L103
(FM
RF
Coil)
(oolofi.Yil'"0''
i
'06
MHz
TC104
(FM
OSC
Trimmer)
TC101
(FM
ANT
Trimmer)
TC102,
TC103
(FM
RF
Trimmer)
Adjust
for
maximum
reading
Repeat
steps
1 &
2 until
no
further
improvement
is
possible'
T101
(FM
IFT)
Same
as
Step
1
DC
Voltmeter:
connect
between
BASE
of
TR305
and
Ground
T2O1
TOP
(DISCRIMI-
NATOR)
Adjust
for
maximum
reading
90
MHz
(4OO
Hz,
Mod.)
Same
as Step
1
Adjust
for
0V
on
DC
Voltmeter
90
MHz
(400
Hz,
Mod.)
Same
as
Step
1
Adjust
for
minimum
distortion
r*o3o-1il'"a.,
oo
uu'
Distortion
Meter
connected
to
TAPE
OUT
jack
T201
Bottom
Same
as
Step
1
Adjust
for
maximum
read
i
ng
9BMHz
I
L
!4^00
Hz,
Mod.)
i
n,
,r,
I
signrr
Meter
SG
output
level:
1
V
Same
as
Step
1
Same
as
Step
1
Adjust
for
60
mV
read-
ing
on
AC
Voltmeter
AC
Voltmeter
connected
to
PIN
2
(or
9)
of
I
vnzgta(or
b)
7110
DOLBY
NR
BOARD
98
MHz
(400
Hz,
Mod.)
Fig.2 FM
DUMMY
ANTENNA
FM
Dummy
Antenna
to
300o
antenna
terminal
of
Receiver.
Zin
=
5012
(75o)
10
125c}
(112.50)