NAD 300 Service Manual page 9

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