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TUNER ADJUSTMENT
" DC voltage is 15V and Speaker Impedance 3 ohms. Output Power 50mW.
MW ADJUSTMENT
:
1 nai
i
Connections
oe
7
cs
7
Step
Pubipiitg
a
aan
ee
ig anak
Position of tuning dial
Adjustment
~T Connect sweep
~ Connect oscilto-
Low end of dia! scale
1
LET
generator to
scope to EXT. SP
pad ae
ee
under no station
T304~T307
Test Loop
terminals.
ts
ation
signal.
aoacee
tt:
Racha
505 KHz (400 Hz
z
. |
ose
Connect AM SG
Connect VTVM to| 30% modulation)
POOL ONS Cia seel:
mos
to Test Loop
speaker terminals.
3
Load
High end of dial scale.
tld at
Se
eet
.
600 KHz (400 Hz
,
'
ANT
Connect AM SG
Connect VTVM to|
30% modulation)
BOO
e Oe Ce Fee:
:
to Test Loop.
speaker terminals.
5
E
eo
1400 KHz on dial scale.
6
Repeat adjustments.
=
a
PREPARE:
1.
3.
Selector switch to "MW".
LW ADIUST MENT
Set the dial pointer to very left line of dial scale.
2. Connect sweep generator, AM SG, VTVM and oscilloscope.
4.
5;
Use a screwdriver with plastic grip for all adjustments.
Use a dummy of back lid and Rod antenna, adjust tracking
points.
es
Te
=
Adjusting
|
ss Connections
fe
S s
a
'
VTVM
Step | _Cireui t
input
Guwat
SG frequency
Position of tuning dial
Adjustment
Oscilloscope
145 KHz (400Hz
'
~
4
7
Low
end of dial scale.
L11
sumed
OSC
Connect AMSG
| Connect VTVM to | 30% modulation)
on
:
.
ie
rane
to Test Loop.
speaker terminals. | 295 KHz (400 Hz
:
F
?
Way
nanan
=
eataes
30% modulation)
High end of dial scale.
160 KHz (400 Hz
:
3
160
KHz
ond
ale.
ANT
Connect AM SG
Connect VTVM
to | 30% modulation)
0
He
crise
7
.
to Test Loop.
speaker terminals.
| 280 KHz (400Hz _
5
30% modulation) _
280 KHz on dial scale.
5
{! Repeat adjustments.
PREPARE:
1,
3.
Selector
switch to "LW".
SW a ritidipsies
—
Set the dial pointer to very left line of dial scale.
2. Connect sweep generator, AM SG, VTVM
and oscilloscope.
30% modulation)
SG frequency
5.8 MHz (400Hz >
19 MHz (400Hz~
30% modulation) _
. Use a screwdriver with plastic grip for ail adjustments.
. Set the Fine Tuning to mechanical center.
. Use a dummy of back lid and Rod antenna, adjust tracking
points.
Position of tuning dial
Adjustment
VTVM
Oscilloscope
Low end of dial scale.
High end of dial scale.
Step
Adjusting
Connections
a
CCU
Input
Output,
a Rs,
14
| Connect AM SG.
ose
to ANT terminal
Connect VTVM
to
H
7,
through
EXT. SP. terminals.
2
|
| dummy.
3
Connect AM SG.
ANT
to ANT terminal
Connect VTVM
to
'
through
EXT. SP. terminals.
4
dummy.
5
Repeat adjustments.
"17.0 MHz (400 Hz
18.0 MHz (400 Hz
30% modulation)
30% modulation)
7.0 MHz on dial scale.
18.0 MHz on dial scale.
PREPARE:
4, Set the dial pointer to very left line dial scale.
2. Connect signal generator to dummy antenna.
5. Set the Fine Tuning to mechanical center.
3.
Use screwdriver with plastic grip for all adjustments.
6.
Use a Dummy antenna as follow.
FM PAB IUSTMENT.
4. Selector switch to "SW"
18°F
;
SO ohm
c
t
Step
Adjustin oe
}_
Soupectons.
SG frequency
Position of tuning dial
Adjustment
| Circuit
"Input
'Output
2
eens De
m n e e
aes
Connect oscillo-
:
OTR
scope to TP4 (H)
T30i; Tate
(pare
Connect sweep
& shield plate (E). | 10.7 MHz
Near max. capacitance
.
soot
generator to FM
| p=
(0% modutation)
tuning gang under
TP1 (H) & TP2 (E}| Connect oscillo-
no station signal.
2
| Ratio Det.
scope to TP5 (H}
T303
|
& shield plate (E).
se
ere
Pes inact
ean ats
Ba Eases
ea ee
-
=
=
eae
i
87.25 MHz(400 Hz
r
3
hes
Connect £56
Connect VTVM to
[30% modulation)
Low end of dial scale.
L106
to
T P -
:
vena
t a e
oe
ker terminal.
TP-2 (E)
Spee
109.0 MHz (400 Hz
:
:
4
-
:
30% modulation}
=
High end of diat scale.
cT3
90.0 MHz (400 Hz
:
is}
2
90.0 MHz on dial scale.
L103, L104
ANT
ey
Cae
Connect VTVM
to | 30% modulation)
5
;
TP-2 (E)
speaker terminal.
| 106.0 MHz (400 Hz
,
(
:
etn
30% modulation)
ee
MHz on dial scale.
eh CT2
; at | Repeat adjustments.
PREPARE:
1. Set the dial pointer to very left line of dial scale.
2. Connect sweep genrator, FM SG, VTVM and oscilloscope. FM antenna input impedance is 300 ohm.
3.
Use a screwdriver with plastic grip for all adjustments.
4.
AFC
switch OFF.
—3—
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