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TUNER
ADJUSTMENTS
Useaplastic
screw driver for adjustments.
Adjust the intermediate
frequency
of AM and FM to the frequency
of ceramic filter.
Supply voltage
: DC 12.OV
Speaker
impedance
: 8 ohms
Standard
output
: 50 mW
Function switch
: RADIO
a. Parts Location
I
II
Swlol
I
r
—
WE
~F1ol
'105
'103
b. AM Adjustment
BAND SELECT
SWITCH
: AM
Adjusting
Circuit
Connections
SG Frequency
Position of
Adjustment
VTVM
Input
output
tuning disl
Oscilloscope
Closed the output
Connect sweep
'ermina' by.sweep
generator to Cl 18
455 kHz
Low
T103
gene;:tfi~p'ace
(H) &Cl 14 (E)
A
I
Step
I
1
IF
Connect AM SG to
Connect VTVM to
515 kHz
Low end
T102
test loop
speaker terminals
Max.
1640 kHz
High end
CT103
Connect AM SG to
Connect VTVM to
600 kHz
600 kHz
L104
Max.
test loop
speaker terminals
1400 kHz
1400 kHz
CT104
Tuning coverage
Tracking
c. FM Adjustment
BAND SELECT
SWITCH
: FM
FM Dummy Antenna:
75 ohm unbalance
Connections
Adjusting
Circuit
SG Frequent
Step
Connect sweep
generator to
IC101 lpin (H) &
JW105 (E)
Connect sweep
generator to Cl 18
(H) & C114 (E)
1
IF
10.7 MHz
'ow F F%
87.4 MHz
Low end
L103
Max.
High end
CT101
>onnect FM SG to
JW106 (H) &
JW105 (E)
2
Connect VTVM to
speaker terminals
r'uning coverage
108.2 MHz
90.0 MHz
106.0 MHz
3
>onnect FM SG to
JW106 (H) &
JW105 (E)
90.0 MHz
I
L102
I
4
5
Connect VTVM to
speaker terminals
Tracking
106.0 MHz
I
CT102
I
-3-
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