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i
TUNER ADJUSTMENTS
-.,. . .
. Use a plastic screw driver for adjustments.
Adjust the intermediate
frequency
of AM and FM to the frequency
of ceramic
filter.
Supply voltage
: DC12.OV
Phones impedance
: 32 ohm
Standard output
: 0.5 mW (126 mV)
Function switch
: RADIO
PARTS
LOCATION
a. Al
E
Step
1
2
3
4
5
6
ADJUSTMENT
BAND
SELECT
SWITCH
:
Adjusting
Connections
Circuit
Input
output
Closed the output
Connect sweep
I temninai by sweep
I
generator
to
IF
I generator,
it place
I
C2106 (H) &
to L2103.
J2101 (G)
I
I
Tuning
I Connect
AM
SG
I Connect
VTVM
to
coverage
/
to Test Loop
I speaker terminals
(n)
c=
1000P
SIGNAL ENERATOR
L=
Gi5i
3 l;~16
~2103 "2'2018
r
002001
mlMm
/
,
\
"M IF IN
vCT-l@
vCT- 3
NO)
~1
@
@l
'2'02
0 VCT-2 @vff-~
L2104
m
4
1C201
XF213
FM?Fp/:(H)
~G~;j4
IF OUT
AM/FM IF OU;Z0c210&01
Connect
AM
SG
Connect
VTVM
to
Tracking
to Test Loop
speaker terminals
.
J
-".'.
AM
1
I
1
1
VTVM
SG Frequency
Position of tuning dial
Adjustment
Oscilloscope
—
455 kHz
Low
XF213
4,
517k Hz
Low end
L2 104
I
I
Max.
I
1750k Hz
High end
VCT-4
I
I
I
600 kHz
600 kHz
L2103
I
I
I
Max.
I
1400 kHz
1400 kHz
VCT -3
?eDeat adjustments
I
b.
FM
ADJUSTI
Adjusting
Step
Circuit
K
1
IF
2
Tuning
3
coverage
4
Tracking
ENT
BAND
SELECT
SWITCH
:
FM
FM
Dummy
antenna
: 75 ohm
1
Connections
i
SG Frequency
I
Position of tuning
dial
I
Adjustment
Input
output
I
Connect sweep
Connect sweep
generator
to
I
generator
to
IC201 @ (H)
C2106 (H)
I
10.7 MHz
I
Low
I ---
& D2001 (G)
&J2101 (G)
I
Connect
FM
SG
Connect
VTVM
to
87.0 MHz
Low end
L2102
toTPl
(H) &TP2 (G)
speaker terminals
109.0 MHz
High end
VCT-2
Connect
FM
SG
Connect VTVM
to
toTPl
(H) & TP2 (G)
speaker terminals
98.0 MHz
98.0 MHz
VCT-1
unbalance
=
A
--i
Max.
Max.
I
[
5
Repeat adjustments
-3-
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