AM-FM RF/IF AMP/M-PX ADJUSTMENT
1 . Variable caoacitor completelv closed. 4' Function switch to "AM."
2. Set the dial pointer to very left line dial scale. 5. Use a screwdriver with plastic grip for all adiustments.
3. Connect sweep generator, SG, V.T.V.M. and oscilloscope.
AM ADJUSTMENT
Step Adjusting
c ircu it
Connection SG. frequencv Position of
tuning dial Adiustment V.T.V.M.
Oscilloscope
I nput Output
FConnect sweep gene-
rator to VC4. Connect oscilloscope
to rest ooint TP2 455 KHz Near max, capa-
city of VC at
position with no
signal.
AM 'lst 9-21160
(Yellowl
AM 2nd 9-21170
(Whitel
AM 3rd 9-21180 455 KHz
z
RF
Connect standard
loop antenna to
output terminal
of SG.
Place receiver 2 feet
from loop antenna
Connect V.T.V,M.
to TP2
600 KHz
(4OOHz. 3O %
modulation) 600 KHz AM ANT
9-25030
AM OSC
9-2081 0(Red)
Max.
1400 KHz
{400H2, 30 %
modulationl 1400 KHz TC AM OSC
TC AM ANT Max.
4 Repeat adiustments
FM ADJUSTMENT
Step Adjusting
circuit Connection SG.frequency Position of
tuning dial Adiustment V.T.V.M.
Oscilloscope
I npul Output
FConnect sweep gene-
rator to test point
TP 5 through 0,01!F
Connect oscilloscope
to test ooint TP3 10.7 MHz
(none modula-
tion )
Near max.capa-
city of VC. at
position with no
si gnal.
FM 1st9-21130
(Orange)
FM 2nd 9-21140
(Blackl A
10.7MHz
2Ratio Det, Connect oscilloscope
to test Doint TP3 FM DET
9-20850(Pink )
9-21150(Bluel 10.7MHz
3
RF Connect FM SG. to
FM ANT terminals. Connect V.T.V.M.
to speaker terminal.
90 MHz
(4O0 Hz, 30 %
modulationl 90 MHz FM ANT 9.2112O
FM OSC 9-20800
FM Coil 9-20370 Max.
4106 MHz
{400 Hz, 30 %
modulation) 106 MHz TC FM OSC
TC FM CRF Max.
5Repeat adjustments.
1. Variable capacitor completely closed.
2. Set the dial pointer to very left line of dial scale.
3. Connect sweep generator, FM SG, V.T.V.M. and
oscilloscope. FM ANT input impedance is 3O0 ohm.
1- Variable capacitor completely closed.
2. Connect FM stereo SG and V.T.V.M.
4. Funcrion switch to "FM AUTO".
5. Use a screwdriver with plastic grip for all adiustments.
3. Function switch to "FM AUTO".
4. Use a screwdriver with plastic Arip for all adiustments.
-1-
FM MPX ADJUSTMENT
Step Adjusting
circu it Connection Position of
tuning dial Adiustment
Inpul Output
1PLL IC
FO (19 KHz)
Adiustment None Connect Frequency
counter or synchro-
scope to TP4
Near max. capa-
city of VC. at
position with no
signal.
Adjust VR02 (5K-B) so that
19 KHz may be indicated on the
f requency counter or synchroscope.
2FM STEREO
Signal
Separation
Connect FMstereo SG to FM
ANT terminals. 19 KHz signal
ON. Main channel, sub channel
signal ON. Add 100O Hz signal
from L Ch.
Connect V.T.V.M. to
output terminal
(R channel).
Connect FM stereo SG to FM
ANT terminals. 19 KHz signal
ON. Main channel, sub channel
signal ON. Add 10OO Hz signal
from R Ch.
Connect V.T.V.M. to
output terminal
(L channell
3Repeat steps 2, Set at position with max. channel separation, lJ
