Sanyo DXT 5004 - AM-FM RF;IF AMP;MPX Adjustment Procedures; AM Adjustment; FM Adjustment; FM MPX Adjustment

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
F
Connect
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
F
Connect
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
2
Ratio
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.
4
106
MHz
{400
Hz, 30
%
modulation)
106 MHz
TC FM
OSC
TC
FM CRF
Max.
5
Repeat 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
1
PLL
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.
2
FM 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
3 Repeat steps 2, Set
at
position
with
max.
channel
separation,
lJ