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ALIGNMENT
PROCEDURES
1. General
a) Test Conditions
Sianal aenerator outwt:
LW Alignment
;tep
1
2
3
4
T
Signal Frepuency
input
of signal
Generator
Through
Dummy
Antenna 216kHz
(Fig. 1) 26dB/'
v
Setting
of Radio
153kHz
Test
Equipment
Connection
Connect a
voltage
meter
to TPO07
and common
ground
Connect a
VTVM to
speaker
output leads.
Connect a
voltage
meter to
TPO06 and
common
ground
-mktiorlteqti
Modu!atian
perwltage
Input signal level
Signal
level
just
deflection.
Signal application:
(LWhlW)403
HZ
(FM)
1 kl+z
(LW/TvlWj200/.
(FM Monaural) 30% (22.5kHz)
(FM Stereo ) 27% L=R, 10% Pilot
(LW/MW)74
dB ,/I V(EMF)
(FM) 54 dB,~ V
high
enough
to provide
meter
a
Adjust TO04
for voltage to be
1
.5V.
Make sure that
voltage is within
4V*
lV to 7.5V
Adjust TO06, TO08
to obtain maximum
out put level.
279kHz
216kHz
Antenna receptacle through the dummy antenna (Fig. 1).
Output meter connection:
To speaker or dummy load (4 ohms)
Setting of radio controls:
Tone control at center position.
Power supply 13.2V
. Location
of the components
for alignment
are shown
in
216kHz
41dB/, V
(EMF)
t6dB
Make sure that
SD is high.
216kHz
ADJUSTMENT
LOCATION.
MW Alignment
FM Alignment
Step
1
2
3
4
5
6
=J==P=
Signal Frequency Frequency
Test
Equipment
Connection
Connection:
Adjust TO03
for voltage to be
1.3 V*0.03V.
SG
Dummy
Antenna
H
'""
WY=
m
Connect a
voltage
meter to
TPO07 and
common
ground.
I
I
531 kHz
tl
I
I
I
STEREO/SDK
SG
Confirm that the
B
1602kHz
2?d%;;
603kHz
'hrough 1404kHz/
'Ummy 24dBEMF
1404kHZ
\ntenna
(Fig. 1)
999kHz
999kHz
voltage reads
between
5.5V to 7.OV.
Signal
Frequency
Setting
Test
input
of signal
of Radio
Equipment
Generator
Connection
step
1
2
3
4
Adjustment
Connect a
VTVM to
speaker
output leads.
Connect a
voltage
meter to
TPO06 and
common
ground.
Connect the
~ase of QO15
to TPO1l.
Adjust TO05,TO07
for maximum
out put level. '
Adjust TOO1
for OV* 20mV.
,
Connect a
98.1 MHz
98.1 kHz
voltage
54dB IL V
meter to
RO03
Adjust TO09,
TO1O for maxim
output level.
Adjust PTO04
to obtain -3dB
at SP output
level(O.5W OdB).
Adjust PTO03
to become the
changeover
point
of High and Low.
r
I
I
Connect a
IL
999kHz/
35dBEMF
'ggkHz
98.1 MHz
98.lkHz
VTVM to
6dB/, V
speaker
output leads.
Through
98.1 MHz
Connect a
Dummy
28dB /, V
oscilloscope
~ntenna
modu.lkHz,
98.1 kHz to TPO06 and
(Fig. 2)
22.5kHz
common
ground.
98,1 MHz
Adjust PTO06 for
high voltage.
Rsg:lnternal
resistance of a signal generator
Adjust PTO02 to
obtain maximum
separation,
and
then turn PTO02
counterclockwise
to make
separation
28dB.
modulation.
Main+ Sub 1kHz
Connect a
20.25kHz Dev. 98.1 kHz
VTVM to
277.
speaker output
Pilot 19kHz
leads.
7.5kHz Dev.
10%
Fia~l Dummv Antenna for MW Alignment
* Make sure ~hat the difference be~ween the output level at
603kHz and 1,404kHz is within 6dB~.
If not, repeat adjustment
of output level at 1,404kHz.
Dummy Antenna (MW)
-—-——
'm';'"
STANDARD
!
SIGNAL
GENERATOR I
(Rsg=50Q )
~
L -----
—d
L-–-
__––___.;
~ Preset coils to 57kHz so that adjustment
would be unnecessary
in
case that the level of 57kHz signal is more than 100mV.
r -----
-
1
K-/)=-o
STANDARD
I
SIGNAL
GENERATOR
(Rsg=50Q )
,
(Fig. 1)
NOTE: Make sure that the voltage should be between 0.9 volts
and 7.0 volts at TPO07(VT)
in the range from 531 kHz
through
1602kHz,
when steps 1 and 2 are completed
mentioned above.
L-
—----A
(Fig. 2)
Rsg:lnternal
resistance of a signal generator. (50Q)
e
Fig,2 Dummy Antenna for FM Alignment
–l–
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