Icom IC-730 Maintenance Manual page 57

co
I
.,.
Adjustment
item
PRE MIX
frequency
adjustment
(continued)
BFO
adjustment
Adjusting procedures
3) With the displayed frequency sequent-
ially varied, adjust each coil at the
PRE MIX UNIT to the following fre-
quencies.
Displayed
Adjusting
frequency
coil
Frequency
3.600.0 MHz L1 43.331.50 MHz
7.100.0 L2
46.831.50
10.100.0 L3 49.831.50
14.100.0 L4 53.831.50
18.100.0 L5 57.831.50
21.100.0 L6
60.831.50
24.600.0 L7 64.331.50
28.100.0 L8 67.831.50
28.600.0 L9 68.331.50
29.100.0 L10 68.831.50
29.600.0
L11 69.331.50
1) Mode: USB (receiving)
2) Connect the frequency counter to R46
of DET PCB.
3) Shunt the cathode of 04 to ground
using a clip.
4) Set the frequency to 9.012.90 MHz
with C40 of DET PCB.
5) Transmitting in the CW mode, adjust
L2 of DET PCB so that the frequency
becomes 9.011.50 MHz.
Measuring location
Adjusting location
Number of
Instrument
adjusting
Measuring
UNIT Terminal UNIT Parts
reading
location
instruments
L1
43.331.50 MHz
L2
46.831.50
L3 49.831.50
L4 53.831.50
L5 57.831.50
~
L6
60.831.50
L7 64.331.50
L8 67.831.50
L9 68.331.50
L10 68.831.50
L11 69.331.50
"
Frequency DET R46
(j)
counter
04
ground
®
DET
C40 9.012.90 MHz
~
DET L2 9.011.50 MHz
~
for free by
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