Receiver Adjustment - Icom IC-730 Maintenance Manual

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8 -
3 RECEIVER ADJUSTMENT
Adjustment
Adjusting procedures
item
AGCGAIN
Adjusting conditions:
adjustment
0
MODE: USB
0
Displayed frequency: 14.098.5 MHz.
0
RF GAIN: MAX
0
IF SHIFT: CENTER
0
RIT: OFF
0
AGC: FAST
0
PRE AMP: OFF
1) Connect
t~e
AC millivoltmeter to
external SP terminal in parallel with
8-ohms speaker.
2) Connect SSG to the ANT connector.
Rotating the tuning control with the
frequency set to 14.100.0 MHz,
receive with the maximum reading of
the mllivoltmeter.
3) With input from SSG set to +14 dBIl
(loaded), adjust L1 of DET PCB for
minimum reading.
4) Adjust AF GAIN so that reading of
the millivoltmeter becomes 1 V.
5) With SSG output turned OFF, adjust
L6 of MAIN UNIT so that reading of
the millivoltmeter is lowered 30 dB
than the reading obtained in above 4).
At the time, adjust L6 in the direction
where core goes down.
Measuring location
Adjusting location
Number of
Instrument
adjusting
Measuring
UNIT Terminal UNIT Parts
reading
location
instruments
AC
Rear EXT. SP
millivolt- panel
meter 8-ohms
speaker
SSG Rear
ANT
panel
DET L1 Minimum
~
,-
MAIN L6
~
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