NAD 300 - Alignment Procedures; AM IF & RF ALIGNMENT

5.
ALIGNMENT
PROCEDURES
Do
not
attempt
alignment unless
the
following equipment
is available.
EOUIPMENT
DESCRIPTION
1.
AM
Signal Generator
5. Stereo
Modulator
9.
Frequency
Counter
2.
Oscilloscope
3. AC Voltmeter
6.
Audio
Generator
7. Distortion
meter
4.
FM Signal Generator
8.
DC Voltmeter
AM
IF
&
RF ALIGNMENT
Output
of
signal
generator
should
be
no
higher
than necessary
to obtain
an output
reading.
Set
SELECTOR switch
51
to AM.
[--00
cm
Loop
Antenna
I
I
I
STEP
SIGNAL
GENERATOR
COUPLING
Refer Fig.
S.IGNAL
GENERATOR
F REOUENCY
455
kHz
(400
Hz
Mod.)
RECE
IVER
DIAL
SETTI
NG
INDICATOR
AC
Voltmeter
to
TAPE
OUT
jack.
ADJUSTMENT
REMARKS
1
Point of non-
i nterference.
(on/about
600
kHz)
T401
(RF
Coil)
Both sections
CF4O1
Adjust
for
maximum
reading.
2
Same
as Step
1
600
kHz
(400
Hz
Mod.)
600
kHz
Same
as step
1
1401
(OSC
Coil)
L451(ANT
Coil)
Adjust
for
maximum
read
i ng.
3
Same as
Step
1
1400
kHz
(400
Hz
Mod.)
1400 kHz
Same
as
step
1
TC107
(OSC
Trimmer)
TC105
(ANT
Trimmer)
TC106
(RF
Trimmer)
Adjust
for
maximum
reading.
Repeat
steps
(2)
and
(3)
4 Same
as Step
1
1000
kHz
(400
Hz
Mod.)
1000 kHz
Same
as step
1
V
R4O2
Adjust
for
150
mV
Audio
Output
5
Same
as Step
1
1000
kHz
(400
Hz
Mod.)
SG
output
level
28mV/m
1000
kHz
SIGNAL
Meter
VR4O1
Adjust
for
maximum
read
i ng
on SIGNAL
meter
AM/FM
IF
L401,
T401,
cF401
TUNER
FRONT
END
TC105, TC106
TC107
Fis.1
AM
ALIGNMENT
CONNECTION