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TUNER ADJUSTMENTS
Use a plastic screw driver for adjustments.
Adjust the intermediate frequency of AM to the frequency of ceramic filter.
Set of unit
:
Supply voltage
AC 230V
:
speaker impedance
4 ohms
:
standard output
50 mW
:
Function select:
TUNER
a. Parts Location
a.AM Adjustment
Adjusting
Step
Circuit
Closed the output
termial by sweep
1
IF
generator,it place
Tuning
Connect AM SG to
2
cover range
Connect AM SG to
3
Tracking
b.FM Adjustment
Adjusting
Step
Circuit
Connect sweep
generator to
1
IF
Tuning
Connect FM SG to
2
cover range
D102(+) & D101(-)
Connect FM SG to
3
Tracking
D102(+) & D101(-)
All manuals and user guides at all-guides.com
L101
CT101
C129
L102
R125
Band :AM
Connections
Input
Output
Connect VTVM to
C129(-)
to AM ANT
Connect VTVM to
test loop
R144
Connect VTVM to
test loop
speaker terminals.
Band :FM
Connection
Input
Output
Connect VTVM to
C139
C129(-)
Connect VTVM to
R125
Connect VTVM to
speaker terminals.
SG
Position of
Frequency
Tuning dial
450 KHz
522 KHz
522 KHz
522 KHz
1611 KHz
1611 KHz
603 KHz
603 KHz
1404 KHz
1404KHz
FM Dummy antenna: 75 ohms unbalance
SG
Position of
Frequency
Tuning dial
10.7 MHz
90.00 MHz
87.50 MHz
87.50 MHz
108.00 MHz
108.00 MHz
90.00 MHz
90.00 MHz
106.00 MHz
106.00 MHz
- 2 -
R144
CT102
T102
T101
T103
VTVM
Adjustment
Oscilloscope
T103
T101
VT: 1.4+-/0.1V
VT: 7.2+-/0.5V
T102
Max.
TC102
VTVM
Adjustment
Oscilloscope
L102
VT: 1.8+-/0.1V
VT: 7.2+-/0.5V
L101
Max.
TC101
This is a basic tuner adjustment.
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