ALIGNMENT PROCEDURES
1. General
a) Test Conditions
Sianal aenerator outwt:
LW Alignment
;tep
1
2
3
4T
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
TPO06and
common
ground
-mktiorlteqti
Modu!atian perwltage
Input signal level
Signal level just
deflection.
Signal application:
(LWhlW)403 HZ (FM) 1kl+z
(LW/TvlWj200/.
(FM Monaural) 30% (22.5kHz)
(FM Stereo )27% L=R, 10% Pilot
(LW/MW)74 dB ,/IV(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
1.3V*0.03V. SG Dummy
Antenna H‘“” WY= m
Connect a
voltage
meter to
TPO07 and
common
ground.
II531 kHz tl III
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 ILVmeter to
RO03
Adjust TO09,
TO1Ofor 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.
rIIConnect a
IL
999kHz/
35dBEMF ‘ggkHz
98.1 MHz 98.lkHz VTVM to
6dB/, Vspeaker
output leads.
Through 98.1 MHz Connect a
Dummy 28dB /, Voscilloscope
~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 asignal 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 asignal generator. (50Q) e
Fig,2 Dummy Antenna for FM Alignment
–l–
