Kenwood RXD-M37-L Service Manual page 6

RXD-M37
QQ
3 7 63 1515 0
TUNER ALIGNMENT PROCEDURE
Equipment needed:
1. AM Signal generator
2. FM Signal generator
3. DC Voltage meter
4. Oscilloscope
5. Output meter (VTVM)
AM Alignment
Step S/G Frequency
1 450 kHz (1 kHz 30% mod.)
2 531 kHz (1 kHz 30% mod.)
3 1602 kHz (1 kHz 30% mod.)
4 612 kHz (1 kHz 30% mod.)
5 1404 kHz (1 kHz 30% mod.)
6
7 999 kHz
(1 kHz 30%mod.)
TE
L 13942296513
AM SIGNAL GENERATOR
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.
6
ADJUSTMENT
Dial Setting Indicator
612 kHz
Low end
High end
612 kHz
1404 kHz
Repeat steps 4 and 5 to minimize tracking error
999 kHz
AM LOOP ANT
60 cm
Figure 4. AM IF/RF Tracking
TEST UNIT
Vt
GROUND
Figure 5. AM Band Frequency Coverage Alignment
x ao u163
y
i
2 9
8
Adjust
Connect T201
oscilloscope or
VTVM to speaker
jack
Connect DC voltage T202
meter to test point Vt
and ground
Same as step 2
Same as step 1 T203
Same as step 1 VC201
Same as step 1
Q Q
3 6 7 1 3 1 5
AM LOOP
ANTENNA
TEST UNIT
R-OUT
L-OUT
GND
DC
METER
co
.
9 4 2 8
Remarks
Adjust until
maximum
output
Adjust until
Vt equal to
1.5 ± 0.05V
Confirm Vt:
6.5~8.5V
Maximum output
Maximum output
Offset is less than
6 dB.
0 5 8 2 9 9 4 2 8
VTVM
DUMMY LOAD
m
9 9
9 9