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5 - 4
5-3 TRANSMITTER ADJUSTMENTS
IDLING
CURRENT
(for driver)
(for final
amplifier)
SWR
DETECTOR
TRANSMITTER
TOTAL GAIN
OUTPUT
POWER
Ic APC
ADJUSTMENT
ADJUSTMENT
ADJUSTMENT CONDITION
MEASUREMENT
VALUE
POINT
UNIT
LOCATION
UNIT
ADJUST
1
2
1
2
1
2
1
1
• Display frequency: 14.10000 MHz
• Mode
: USB
• RF power
: Minimum (L)
• Mic gain
: Minimum (0)
• Disconnect J3601 (MAIN unit) and
preset R21, R24 (PA unit) to max.
counter clockwise.
• Transmitting
• Transmitting
• Display frequency: 14.10000 MHz
• Mode
: USB
• RF power
: Maximum (H)
• Connect J4 (FILTER) unit to GND.
• Connect an audio generator to
[MIC] connector and set as:
Frequency
: 1.5 kHz
Level
: 30 mVrms
• Transmitting
• Transmitting
• Display frequency: 14.10000 MHz
• Mode
: USB
• RF power
: Maximum (H)
• Mic gain
: Center (50)
• R2701 (MAIN unit): Center
• Connect an audio generator to
[MIC] connector and set as:
Frequency
: 1.5 kHz
Level
: 3 mVrms
• Transmitting
• Transmitting
• Display frequency: 14.10000 MHz
• Mode
: USB
• RF power
: Maximum (H)
• MIC gain
: Center (50)
• Connect an audio generator to
[MIC] connector and set as:
Frequency
: 1.5 kHz
Level
: 30 mVrms
• Transmitting
• Display frequency: 3.55000 MHz
• Mode
: USB
• Connect CP4002 (MAIN unit) to
GND.
• RF power
: Maximum (H)
• Mic gain
: Center (50)
• Connect an audio generator to
[MIC] connector and set as:
Frequency
: 1.5 kHz
Level
: 30 mVrms
• Transmitting
PA
Rear
panel
FILTER
Rear
panel
Rear
panel
Rear
panel
Connect an ammeter
(3 A) between power
supply and the IC-
718.
Connect an RF
power meter to [ANT]
connector.
Connect a digital
multimeter or oscillo-
scope to J5.
Connect an RF
power meter to [ANT]
connector.
Connect an RF
power meter to [ANT]
connector.
Connect an ammeter
(30A) between power
supply and the IC-
718.
At the point where the
Tx current Increases
200 mA.
At the point where the
Tx current Increases
400 mA.
100 W
Minimum voltage
Maximum output
power
50 W
100 W
22 A
PA
Front
panel
FILTER
MAIN
MAIN
MAIN
R21
R24
Mic gain
control in
the quick
set mode
C17
L106,
L151,
L301,
L302,
L303,
L501
R503
R1707
R1720
After adjustment, connect J3601 on the MAIN unit.
After adjustment, disconnect J4 on the FILTER unit from GND.
After adjustment, disconnect CP4002 on the MAIN unit from GND.
Summary of Contents for IC-718
Page 29: ...SERVICE MANUAL ADDENDUM CONTENTS PARTS LIST 1 BOARD LAYOUTS 19 VOLTAGE DIAGRAM 25 Jun 2011 ...
Page 49: ...Jun 2011 20 C16 CP1 PLL UNIT BOTTOM VIEW FILTER UNIT BOTTOM VIEW PA UNIT BOTTOM VIEW ...
Page 81: ...SERVICE MANUAL ADDENDUM CONTENTS PARTS LIST 1 BOARD LAYOUTS 16 VOLTAGE DIAGRAM 18 Jul 2009 ...
Page 196: ...9 4 VARISTOR BOARD BOTTOM VIEW PLL UNIT BOTTOM VIEW PA UNIT ...
Page 200: ...9 8 BOTTOM VIEW FILTER UNIT ...
Page 206: ...1 1 32 Kamiminami Hirano ku Osaka 547 0003 Japan S 13701MZ C1 q 2000 Icom Inc ...