NAD 300 Service Manual page 10

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)