Icom IC-7700

4 - 5
4-3 ADJUSTMENTS ON THE RF UNIT
ADJUSTMENT ADJUSTMENT CONDITION OPERATION
ADJUSTMENT
POINT
VALUE
PRERARATION
(Preset)
1 • Frequency : 14.150 MHz
• Mode : USB
• ANTENNA : [ANT1]
• [P.AMP1] : "ON"
• Receiving
• Connect a Digital multimeter to
CP1102" (RF UNIT).
R1101
(RF UNIT)
4.4–4.6 V
2• Connect a Digital multimeter to
CP1103" (RF UNIT).
R1132
(RF UNIT)
4.4–4.6 V
3• Set R1228 (RF UNIT) to center
position.
R1228
(RF UNIT)
Center
position
(MCF-M) 4• Set the L1401 and L1402 as below.
L1401, L1402
(MCF-M BOARD)
–
(MCF-W) 5• Set the L1401 and L1402 as below.
L1401, L1402
(MCF-W BOARD)
–
(MCF-N) 6• Set the L1401 and L1402 as below.
L1401, L1402
(MCF-N BOARD)
–
RECEIVE
SENSITIVITY
(HF BAND)
1 • Frequency : 14.150 MHz
• Mode : USB
• ANTENNA : [ANT1]
• Receiving
1) Connect an SSG to the [ANT1] and
set as;
Frequecy : 14.1515 MHz
Level : 0 dBµ
Modulation : None
2) Connect an AC Millivoltmeter to the
[EXP-SP].
3) Adjust the sensitivity with L1408
and L1058.
L1408, L1058
(repeatedly)
(RF UNIT)
Max. audio
output leve
l
IMAGE
RESPONSE
1 • Frequency : 14.150 MHz
• Mode : USB
• ANTENNA : [ANT1]
• Receiving
1) Connect an SSG to the [ANT1] and
set as;
Frequecy : 14.0765 MHz
Level : +94 dBµ
Modulation : None
2) Connect an AC Millivoltmeter to the
[EXP-SP].
3) Adjust the sensitivity with R1516
and C1656.
R1516, C1656
(RF UNIT)
Min. audio
output leve
l
RECEIVE
SENSITIVITY
(50 MHz BAND)
1 • Frequency : 50.0200 MHz
• Mode : USB
• ANTENNA : [ANT1]
• [PREAMP2] : "ON"
• Receiving
1) Connect an SSG to the [ANT1] and
set as;
Frequecy : 50.0215 MHz
Level : –10 dBµ
Modulation : None
2) Connect an AC Millivoltmeter to the
[EXP-SP].
3) Adjust the sensitivity with L1222.
L1222
(RF UNIT)
Max. audio
output leve
l
IF THROUGH
(50 MHz)
1 • Frequency : 50.0200 MHz
• Mode : USB
• Receiving
1) Connect an SSG to the [ANT1] and
set as;
Frequecy : 64.455 MHz
Level : +94 dBµ
Modulation : None
2) Monitoring the S-METER on the
display, adjust the swing width with
C1265.
C1265
(RF UNIT)
Min.
swing
width
3 rotation
s
Core
3.5 rotations
Core
4.5 rotations
Core
Center position