- 2 -
TUNER ADJUSTMENTS
• Use a plastic screw driver for adjustments.
• Adjust the intermediate frequency of AM and FM to the frequency of ceramic filter.
• Set of unit
Supply voltage
: DC 12V
Speaker
: 8 ohms
Standard output
: 50 mW
Function switch
: RADIO
a.PARTS LOCATION
b. AM ADJUSTMENT
Band switch : AM
Adjusting
Equipment
S t e p
G e n .
Set Radio
To obtain MAX. output adjust.
Circuit
Connection
f r e q .
freq. To
Measurement
IF
AM
Connect Digital Voltmeter to
band
Collector of Q404
Tracking
Connect VTVM and 4 ohm
load across speaker terminals.
Signal Generator coupled by
a loop antenna.
Output level must be below
Repeat steps 4 and 5 obtain Maximum output.
reference output.
L703 ant. Coil.
TC702 ANT-TRIMMER.
1
T702
522kHz
522kHz
1611kHz
1611kHz
T701 (Adjust the voltage to 1.42 +/- 0.2V)
Confirm the voltage to 7.05 +/- 0.3V
5
6
450kHz
1611kHz
603kHz
1404kHz
603kHz
1404kHz
2
3
4
c. FM ADJUSTMENT
Band switch : FM
Adjusting
Equipment
S t e p
G e n .
Set Radio
To obtain MAX. output adjust.
Circuit
Connection
f r e q .
freq. To
Measurement
FM
Connect Digital Voltmeter to
band
Collector of Q404
Tracking
Connect VTVM and 4 ohm
load across speaker terminals.
Signal Generator to ANT.
Output level must be below
reference output.
5
Repeat steps 3 and 4 obtain Maximum output.
T701 (Adjust the voltage to 4 +/-0.2V)
Confirm the voltage to 8.1 +/- 0.2V
L702(FM RF coil)
TC701 ANT-TRIMMER.
87.5MHz
107.9MHz
90.1MHz
106.1MHz
87.5MHz
107.9MHz
90.1MHz
106.1MHz
1
2
3
4
