Icom Ic-703 Hf/50mhz All Mode Tranciever Instruction Manual

							When “3 SIMPLE MODE” is set to ON, * marked items are undisplayed.76
12SET MODE
4 MODE SELECT(Mode Availavility)
This item is available in all modes, and allows you to
simplify operation by inhibiting the selection of un-
needed operating modes during normal operation.
For example if you are operating mobile and only plan
on using FM and AM modes, use “4  MODE  SE-
LECT” to inhibit access to all other modes (SSB, CW,
RTTY), thereby making selection of AM or FM quick
and easy.
The default is on for all operating
modes. To toggle an operating mode
on or off, push (or push and hold)
[MODE] one or more times until the
desired mode is displayed, then rotate
the main dial to set on or off.
* 5 MODE POWSET
This item allows you to set the output power for each
operating mode. 
on : Output power can be set for each mode groups.
oFF: Same output power for every mode.
The mode groups are separated ‘SSB-D/USB/LSB,’
‘CW’ and ‘RTTY/AM/FM.’The default is OFF.
Initial set mode items
2 PoSAVE MODE
The power save mode reduces the current drain to
conserve battery power. This function is convenience
for battery operation.
AUTO : The power save function starts in 1:1 (200
msec.:200 msec.) ratio when no signal is re-
ceived for 5 sec., then the ratio becomes in
1:4 (200 msec.:800 msec.) and 1:8 (200
msec.:1600 msec.) after no signal is received
every 60 sec. are past.
(1 :) 1, 4, 8, 16:
The power save function activates selected
ratio.
oFF : The power save function does not activate.
The default is OFF.
3 SIMPLE MODE
This item select the simple mode and normal mode.
on : Simple mode is selected. (*) marked items in initial
set mode are hidden, and push [DISPLAY] to se-
lect Main menu or Sub menu only, Graphic menu
also hidden.
oFF : Normal mode is selected.
Simple mode ON
Simple mode OFF
(default)
1 MAX POWSET
This item selects maximum output power. The max.
power is can be set 10, 5, 2.5, 1 or 0.5 W.The default is 10 W.
(Output power setting for modes) (Max. output power setting)
(Power save setting)
(Simple mode setting)
12 
						

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12SET MODE
* 10 CW NOR SIDE
This item select the carrier point of CW mode from
LSB and USB.
The carrier point is 
LSB side (default).The carrier point is 
USB side.
6 BEEP(Confirmation beeps)
A beep sounds each time a switch is pushed to con-
firm it. This function can be turned OFF for silent op-
eration.
Confirmation beep ON
(default)Confirmation beep OFF
* 7 BAND BEEP(Band edges beep)
A beep sounds when an operating frequency enters or
exits a transmit frequency range. This functions inde-
pendent of the confirmation beep setting (above).
Band beep ON
(default)Band beep OFF
8 BEEP LEVEL
When “6 BEEP” is set ON, this item adjust the con-
firmation beep level. Adjustable levels are 0 to 10 in 1
steps.The default is 5.
* 9 BEEP LIMIT
Thisitem allows you to set a maximum volume level
for confirmation beep tones. Confirmation beep tones
are linked to the [AF] control until a specified volume
level is reached— further rotation of the [AF] control
will not increase the volume of the beep tones.
Beep limit ON
(default)Beep limit OFF
* 12 SID-T LIMIT
This item sets the CW side tone level limit. When the
[AF] control is rotated above a specified level, the CW
side tone does not increase.
on : CW side tone level is limited. (default)
oFF : CW side tone level is not limited.
CW side tone limit ON
(default)CW side tone limit OFF
11 SID-T LEVEL
This item sets the CW side tone output level. Selec-
table levels are 0 to10 in 1 steps.The default is 5.
(Beep audio level limit)
(CW carrier point setting)
(CW side tone level)
(CW side tone level limit)
When “3 SIMPLE MODE” is set to ON, * marked items are undisplayed.(Beep level adjustment) 
						

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12SET MODE
* 18 AUTO OFF
The auto power OFF function can be used to auto-
matically turn the transceiver OFF after a specified
time of operation. This item can be set to 30 min., 60
min., 90 min., 120 min., or OFF.
Auto power OFF set to
20 min. Auto power OFF
deactivates. (default)
* 13 SYNC TUNING
This item selects the displayed frequency shift func-
tion from ON and OFF.
When this function is activated, the receiving signal
can be kept in receive even when the operating mode
is changed between SSB and CW. 
oN : The displayed frequency shifts when the oper-
ating mode is changed between SSB and CW.
oFF : The displayed frequency does not shift. (default)The frequency shifting value may differ according
to the CW pitch setting.
Synchronous tuning ON
Synchronous tuning OFF
(default)
15 KEY LIGHT
The key/switch backlighting can be set to high, low or
OFF to suit ambient lighting.
Key/switch backlighting 
set to high (default).Key/switch backlighting 
set to low.
17 LED BRIGHT(LED brightness)
The LED brightness control for front panel can be set
to high or low.
LED brightness set 
to high.LED brightness set 
to low (default).
* 16 LIGHT TIMER
The Light timer can be set to AUTO, ON or OFF to
suit lighting condition.
Auto : Automatically select “on” or “oFF” depends on
power supply voltage. (default)
on : Lights when some operation is performed, goes
out after 5 sec.
oFF : Lights continuously during transceiver power is
ON.Default is Auto.
14 BACK LIGHT
The function display backlighting can be set to high,
low or OFF to suit ambient lighting.
Display backlighting set to
high (default).Display backlighting set to
low.
(SSB/CW frequency shift setting)
(Display backlighting)
(Key/switch backlighting)
(Light timer setting)
(Automatic power OFF)
12
When “3 SIMPLE MODE” is set to ON, * marked items are undisplayed. 
						

							79
12SET MODE
* 23 PEAK HOLD
When the peak hold function is ON, the highest acti-
vated segment of the meter remains visible for 0.5
sec.; when OFF, the meter functions normally.
Peak hold ON
(default)Peak hold OFF
* 20 RF/SQL(RF gain/squelch control)
The [RF/SQL] control can be set as the squelch con-
trol (default), the RF/squelch control (USA version de-
fault) or automatic (acts as squelch in FM/AM modes;
as RF in SSB/CW/RTTY modes). (See p. 24)
The [RF/SQL] control
functions as squelch
control only. The [RF/SQL] control 
functions as RF gain 
and squlch control for 
all modes.
* 21 SUB DIAL(Sub dial setting)
When this item is set to “rit,” pushing [RIT/SUB]  turns
the RIT function ON (lights red)—rotating [M-CH]
changes the RIT frequency; when this item is set to
“FrEq,” pushing [RIT/SUB] turns the sub dial function
ON (lights green)—rotating [M-CH] changes the op-
erating frequency. Note that in FM and AM modes,
pushing [RIT/SUB] always selects the sub dial func-
tion (lights green), regardless of this setting.
Pushing [RIT/SUB]
selects the RIT function
(default).Pushing [RIT/SUB]
selects the sub dial function.
22 OPT. FIL
When an optional filter is installed, this selection is
necessary, otherwise the filters cannot be selected.
Selections available are FL-52A, FL-53A, FL-222, FL-
257 and none (default). See p. 49 for usable filters for
each mode and see p. 87 for filter installation.
Although the FL-96 is not listed on the option list, IC-703
would take FL-96 as well as other optional filter.
No filters are selected
(default).FL-52A (for CW narrow filter)
is selected.
19 CURRENT IP
This item set the control of current intercept point for
power saving.
Auto : Automatically select “on” or “oFF” depends on
power supply voltage. (default)
on : Power saving mode continuously.
oFF : Priority to intercept point.Default is Auto.
* 24 QUICK SPLIT
When this item is set to ON, pushing [(F-1)SPL] for 1
sec. in the M1display sets the undisplayed VFO fre-
quency to the displayed VFO frequency plus the split
offset, and activates split operation.
Quick split function ON
(default).Quick split function OFF.
(Quick split function) (Optional filter selection)
(Peak meter hold setting)
When “3 SIMPLE MODE” is set to ON, * marked items are undisplayed.(Current intercept point) 
						

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12SET MODE
26 SPL OFFSET
This item sets the offset (difference between transmit
and receive frequencies) for the quick split function.
Available offset frequencies are –9.999 to 9.999 MHz
in 0.001 MHz (1kHz) steps.Default is 0.000 MHz.
* 25 SPLIT LOCK
When this item is ON, the main dial can be used to
adjust the transmit frequency while pushing 
[
(F-3)XFC] even when the lock function is activated.Split lock function OFF
(default)Split lock function ON
* 30 AM NB(Noise blanker in AM mode)
When this item is set to ON, the noise blanker func-
tion is available in AM mode. This is useful when
communicating in AM mode (the noise blanker func-
tion should not be used when listening to regular AM
broadcasts as it may degrade the received audio).
Noise blanker is available
on AM mode. (default)Noise blanker is not 
available on AM mode.
28 SCAN SPEED(Scanning speed)
This item sets the rate at which channels or frequen-
cies are scanned during scan operations. High or low
can be selected.
Scan speed is set to high
(default).Scan speed is set to low.
29 U/D SPEED([UP]/[DN] speed)
This item sets the rate at which frequencies are
scanned through when the [UP]/[DN] switches of the
microphone are pushed and held. High or low can be
selected.
Up/down speed is set to
high (default).Up/down speed 
is set to low.
27 SCAN RESUME
This item sets the scan resume function ON or OFF.
on : Scan resumes 10 sec. after stopping on a sig-
nal (or 2 sec. after a signal disappears); 
oFF : Scan does not resume after stopping on a sig-
nal. For the priority watch, setting to OFF
pauses the watch until signal disappears and
scan resumes.
Scan resume function is
turned ON (default).Scan resume function is
turned OFF.
31 PAD CH(Available memo pads)
This item sets the number of memo pad channels
available. 5 or 10 memo pads can be selected.
5 memo pads are available
(default).10 memo pads are 
available.
(Split lock function)
(Split offset frequency)
(Scan resume condition)
12
When “3 SIMPLE MODE” is set to ON, * marked items are undisplayed. 
						

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12SET MODE
32 PWR ON CHK
This item selects the indication ON or OFF when turn-
ing power ON.
on : The Transceiver briefly displays ‘All indication,’
‘RF power’ and ‘Power supply voltage’ when
turning power ON.
oFF : The display goes directly to frequency indication
at power ON.
Power on check ON
(default)Power on check OFF
* 35 TUNER SW
This item select BAND or ALL.
bAnd : [TUNER] switch ON/OFF condition is re-
mained for each band.
ALL : [TUNER] switch ON/OFF condition is com-
monly remained for all band.
The default is BAND.
* 34 PTT TUNE(PTT tune function)
This item set the PTT tuner start function ON or OFF.
This function activates internal tuner and optional AT-
180/AH-4 
ANTENNA TUNER, when connected.
on : The tuner is always tuned when the PTT is
pushed after the frequency is changed (more
than 1% from last-tuned frequency). (Internal
tuner or connected AT-180)
Tuning can be started automatically at the mo-
ment the PTT is pushed. (Connected AH-4)
oFF : PTT tuner start function OFF.Tuning starts when pushing 
[PTT] on a new frequency.Tuning starts only when
[TUNER] is pushed 
(default).
* 33 A-TUNE STRT
The optional AT-180 ANTENNA TUNERhas an automatic
start capability which starts tuning if the SWR is
higher than 1.5–3.
oFF : The tuner remains OFF even when the SWR is
poor (1.5–3).
on : Automatic tune starts even when the tuner is
turned OFF.NOTE:Even when “on” is selected, automatic tune
does not start for the 50 MHz band.
Auto tune function OFF
(default).Auto tune function ON.
36 9600 MODE(Packet data speed)
This item is used to change the communications
speed  for packet operation. The data socket speed
can be set to 1200 or 9600 baud.
Default is 9600 baud.
(Auto tune start function)
When “3 SIMPLE MODE” is set to ON, * marked items are undisplayed.(Power on check function)
(Tuner switch condition) 
						

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12SET MODE
37 SPEECH LANG
When the optional UT-102 VOICE SYNTHESIZER UNITis
installed, you can select between English and Japan-
ese as the language.
Voice synthesizer functions
in English (default).Voice synthesizer 
functions in Japanese.
(Voice synthesizer language)
39 S-LVL SPCH
When an optional UT-102 SPEECH SYNTHESIZER UNIT
is installed, the synthesizer can be set to read out the
frequency/mode only, or both the frequency/mode
and S-meter level.Voice synthesizer reads out
both the frequency/mode 
and  S-meter level (default).Voice synthesizer reads 
out the frequency/mode 
only.
40 CI-V ADDRES
To distinguish equipment, each CI-V transceiver has
its own Icom standard address in hexadecimal code.
The IC-703’s address is 68H.
When 2 or more IC-703’s are connected to an op-
tional CT-17 
CI-V LEVEL CONVERTER, rotate the main
dial to select a different address for each IC-703 in
the range 01H to 7FH.
Address set to 68H
(default).Address set to 7FH.
* 41 CI-V BAUD
This item sets the data transfer rate. When “Auto” is
selected, the baud rate is automatically set according
to the connected controller or remote controller.
Auto baud rate (default)
19200 bps
* 43 CI-V 731
When connecting the IC-703 to the IC-735 for trans-
ceiver operation, you must change the operating fre-
quency data length to 4 bytes.
• This item MUSTbe set to “on” only when operating trans-
ceiver with the IC-735.
Frequency data set to
5 bytes (default).Frequency data set to
4 bytes.
* 42 CI-V TRN (CI-V transceive)
Transceiver operation is possible with the IC-703 con-
nected to other Icom HF transceivers or receivers.
When “on” is selected, changing the frequency, oper-
ating mode, etc. on the IC-703 automatically changes
those of connected transceivers (or receivers) and
vice versa.
Transceive ON
 (default)Transceive OFF
38 SPEECH SPD
When the optional UT-102 VOICE SYNTHESIZER UNITis
installed, you can select the speech speed of synthe-
sizer output between faster or slower.
Speech speed
is faster (default).Speech speed
is slower.
(Voice synthesizer speed)
(S-meter level speech)
(CI-V address setting)
(CI-V data transffer rate)
(CI-V operating frequency data length)
12
When “3 SIMPLE MODE” is set to ON, * marked items are undisplayed. 
						

							13
83
MAINTENANCE
If the transceiver becomes dusty or dirty,
wipe it clean with a dry, soft cloth.AVOIDthe use of strong chemical solvents
such as thinner, benzine or alcohol to clean
the transceiver. These may damage the
transceiver’s surfaces.
Fuse replacement
If a fuse blows or the transceiver stops functioning, try
to find the source of the problem, and replace the dam-
aged fuse with a new, rated fuse.
CAUTION: Disconnect the DC power cable from
the transceiver when changing a fuse.
The IC-703 has three of fuses (DC power cable fuses×
2, circuitry fuse×1) installed for transceiver protection.
• Fuses  ............................................. F.G.B. 125 V 4 A
DC POWER CABLE FUSE REPLACEMENT
q
w
e
CIRCUITRY FUSE REPLACEMENT
The 13.8 V DC from the DC power cable is applied to
all units in the IC-703, except for the power amplifier,
through the circuitry fuse. This fuse is installed in the
PA unit.
Memory backup
All of the CPU’s memory is backed up by an EEP-
ROM (Electronically-Erasable Programmable Read-
Only Memory). All data you set, such as VFO,
memory, set mode contents, etc. is stored in this
EEPROM. There is no internal lithium battery.
Cleaning
Fuse 
						

							14
84
TROUBLESHOOTING
The following chart is designed to help you correct
problems which are not equipment malfunctions.If you are unable to locate the cause of a problem or
solve it through the use of this chart, contact your near-
est Icom Dealer or Service Center.
PROBLEM
POWER SUPPLY RECEIVE
POSSIBLE CAUSE SOLUTION REF.
Power does not come 
on when the [POWER] 
switch is pushed. 
No sound comes from 
the speaker.
Sensitivity is low.
Receive audio is distor-
ted.
Receive signal is distor-
ted with strong signals.DC power cable is improperly 
connected.
Fuse is blown.
Battery is exhausted if you are using 
a 12 V battery as the power source.Reconnect the power cable correctly.
Check for the cause, then replace the 
fuse with a spare one.
(Fuses are installed in two places. One is 
installed in the DC power cable and the 
other is installed in the PA unit.
Check the battery voltage with the 
[POWER] pushed IN.p. 15
p. 83
—
pgs. 1,  
17, 23
pgs. 1, 
17, 24
—
p. 14
—
—
pgs. 
64– 66
p. 46
p. 23
p. 47
p. 48
p. 46
Volume level is set too low.
The squelch is closed.
The transceiver is in the transmitting 
condition.
An external speaker or headphones 
are connected.
The antenna is not connected properly.
The antenna feed line is cut or shorted.
The antenna is not properly tuned.
The attenuator function is activated.
The operating mode is not selected 
correctly.
The [SHIFT] control is set off-center.
Noise blanker function is activated.
Preamp is activated.
Rotate [AF] clockwise to obtain a suit-
able listening level.
Rotate [SQL] counterclockwise to 
open the squelch.
Release [PTT] on the microphone or 
check the SEND line of an external 
unit, if connected.
Check the external speaker or head-
phone plug connection.
Reconnect to the antenna connector.
Check the feed line and correct any 
improper conditions.
Push [TUNE] to manually tune the 
antenna.
Push [ATT] to turn the function OFF.
Select a suitable operating mode.
Set [SHIFT] to the center position.
Push [(F-2)NB] in the M3 display to 
turn the function OFF.
Push [P.AMP] to turn the function 
OFF.
13
14 
						

							85
14TROUBLESHOOTING
PROBLEM
TRANSMIT DISPLAY SCAN
POSSIBLE CAUSE SOLUTION REF.
Transmitting is impossi-
ble. 
Output power is too low. 
No contact possible with 
other stations. 
Repeater cannot be ac-
cessed. 
Transmitted signals are 
distorted. 
Displayed frequency 
does not change proper-
ly.
Programmed scan does 
not stop.
Programmed scan does 
not start.
Memory scan does not 
start.
Memory select scan 
does not start.The operating frequency is not set to 
a ham band. 
Power is set to a lower power than 
maximum.
Microphone gain is set too low.
The antenna is not connected properly.
The antenna feed line is cut or shorted.
The antenna is not properly tuned.
The transceiver turning ON the battery 
operating mode.
RIT function is activated.
Split function is activated.
Split function is not activated.
An incorrect transmit frequency is set.
Subaudible tone encoder is OFF and 
repeater requires a tone for access.
Programmed subaudible tone fre-
quency is wrong.
Microphone gain is set too high.
The compression level is set too high 
with the speech compressor ON.
The dial lock function is activated.
The internal CPU has malfunctioned.
Squelch is open.
The same frequencies have been 
programmed in scan edge memory 
channels.
2 or more memory channels have not 
been programmed.
2 or more memory channels have not 
been designated as select channels.Set squelch to the threshold position.
Programm different frequencies into 
scan edge memory channels.
Program 2 or more memory chan-
nels.
Designate 2 or more memory chan-
nels as select channels for the scan.
Set gain in quick set mode.
Set compression level to a suitable 
position.
Push [LOCK] to deactivate the func-
tion. 
Reset the CPU.
(While pushing [UP] and [DN] push [POW-
ER] to turn power ON.
Push [(F-1)SPL] in the M1 display to 
turn the function ON
.
Set the proper frequencies into VFO 
A and B or into one of the memory 
channels.
Use 
[(F-2)TON] in the M4 display to se-
lect FM-T.
Program the required frequency using 
FM tone set mode.
Push [RIT] to turn the function OFF.
Push [(F-1)SPL] in the M1 display to turn 
the function OFF.
Set the output power in quick set 
mode/initial set mode.
Set microphone gain to a suitable 
position using quick set mode.
Reconnect the antenna connector.
Check the feed line and correct any 
improper conditions.
Push [TUNE] to manually tune the 
antenna.
Check the battery voltage with the 
[POWER] pushed IN.
Set the frequency to a ham band.
p. 19
pgs. 25, 
26
p. 26
—
—
pgs. 
64–66
pgs. 1,
25
p. 47
p. 51
p. 51
p. 19
p. 45
p. 44
p. 26
p. 54
p. 25
p. 17
p. 24
p. 62
p. 62
p. 63