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

6
1PANEL DESCRIPTION
DS1 functions
MEMORY WRITE (p. 57)
Push for 1 sec. to store the selected
readout frequency and operating mode
into the displayed memory channel.
MEMO PAD WRITE (p. 60)
Push to store the the selected readout
frequency and operating mode into a
memo pad.
MEMO PAD READ (p. 60)
Push to call up a memo pad.
DS2 functions
DURING VFO MODE:
DURING MEMORY MODE:
SCAN (pgs. 61–63)
Push to start or stop the scan function.
PRIORITY WATCH (p. 63)
Push to start or stop the priority watch....

7
1PANEL DESCRIPTION
Rear panel
qANTENNA CONNECTOR [ANT] (p. 13)
Accepts a 50 Ωantenna with a PL-259 connector.
wGROUND TERMINAL [GND] (p. 11)
Connect this terminal to a ground to prevent electri-
cal shocks, TVI, BCI and other problems.
eDATA SOCKET [DATA] (pgs. 8, 14)
6-pin min DIN socket to connect a TNC (Terminal
Node Controller), etc. for packet operation.
• See page at right for socket information.
rACCESSORY SOCKET [ACC] (pgs. 8, 14)
Enables connection to external equipment such as a
TNC for data...

8
1PANEL DESCRIPTION
DDATA socket
DACC socket
ACCPIN No.NAME DESCRIPTION SPECIFICATIONS
1 2 3 4
8765
9
10 11 12
13
Rear panel view
qbrownigray
wredowhite
eorange!0black
ryellow!1pink
tgreen!2light
blue
yblue
upurple!3light
green
1 8 V Regulated 8 V output.Output voltage : 8 V ±0.3 V
Output current : Less than 10 mA
2 GND Connects to ground. ———
Input/output pin. 
(HF/50 MHz only)Ground level : –0.5 V to 0.8 V
3
HSENDGoes to ground when transmitting. Output current : Less than 20 mA
When grounded,...

9
1PANEL DESCRIPTION
Function display
qNARROW/WIDE FILTER INDICATORS
➥“ã” appears when selecting AM narrow or FM
narrow modes.
➥When installing an optional narrow filter, narrow
mode can be selected in CW, RTTY and SSB
modes.
• When the SSB wide filter is installed, “ç” appears
during wide mode selection.
wMODE INDICATORS
Show the selected operating mode.
•“å” appears when CW reverse or RTTY reverse mode is
selected.
eSPLIT INDICATOR
Appears during split operation.
rPROGRAMMABLE/1 MHz TUNING STEP...

10
1PANEL DESCRIPTION
•MICROPHONE CONNECTOR
Microphone (HM-103)
qUP/DOWN SWITCHES [UP]/[DN]
Change the operating frequency.
• Push and hold to change the frequency continuously.
• Tuning step is 50 Hz when no TS indicator appears.
wLOCK SWITCH [LOCK]
Locks the [UP]/[DN] switches.
ePTT SWITCH [PTT]
Push and hold to transmit; release to receive.
DN UPLOCK
OFF ON
q
we
TECHNICAL INFORMATION
PIN NO.FUNCTIONDESCRIPTION
1+8 V DC outputMax. 10 mA
2Frequency upGround
Frequency downGround through 470 Ω
8Squelch...

2
11
INSTALLATION AND CONNECTIONS
Unpacking
After unpacking, immediately report any damage to the
delivering carrier or dealer. Keep the shipping cartons.
For a description and a diagram of accessory equip-
ment included with the IC-703, see ‘Supplied acces-
sories’ on p. ii of this manual.
Selecting a location
Select a location for the transceiver that allows ade-
quate air circulation, free from extreme heat, cold, or
vibrations, and away from TV sets, TV antenna ele-
ments, radios and other...

2
12
INSTALLATION AND  CONNECTIONS
To raise the stand:
With the transceiver upside down, pull the stand to-
wards the rear panel and then upwards, as illus-
trated below. 
Installation
DSingle body mountingDStand
Nut Spring washer
Flat washer
*CAUTION: Non-supplied screws (longer than 8 mm)
may damage the internal units. MB-62
(optional)
Supplied with
the MB-62*
Pull backthen up
DFront panel separation
DFront panel mounting
qWhile pulling the panel release button towards you,
slide the front panel to...

13
2INSTALLATION AND  CONNECTIONS
Required connections
BAND
BAND
MODE
TS
DISPLAY
LOCK
F 1 F 2 F 3
AF RF SQL
RIT
SHIFT M-CHSUB
PHONESTUNER P.AMP
AT T
Y
Z
POWER
MENU
TX RX
MICROPHONE (p. 10)
HF/50 MHz ANTENNAGROUND
 (p. 11)
HM-103
CW KEY (p. 28)
Use the heaviest gauge wire or 
strap available and make the 
connection as short as possible.
Grounding prevents electrical 
shocks, TVI and other problems.
Connects to DC 9.0–15.8 V 
power supply. See p. 15 for 
details. 

14
2INSTALLATION AND  CONNECTIONS
Advanced connections
BAND
BAND
MODE
TS
DISPLAY
LOCK
F 1 F 2 F 3
AF RF SQL
RIT
SHIFT M-CHSUB
PHONESTUNER P.AMP
AT T
Y
Z
POWER
MENU
TX RX
OPC-589 (p. 92)
DESKTOP(p. 91)
MICROPHONE
 
Selectable with the [PHONE/SPEAKER] switch
on the back of the front panel.SPEAKER
ACC SOCKET (p. 8)
DATA SOCKET
 (p. 8)
6-pin mini DIN socket to connect to a
TNC, etc. for packet operation.
AH-4
  (p. 16)
AH-2b
EXTERNAL
SPEAKER
 (p. 91)
HEADPHONES
SP-7/SP-10SM-20
or
REMOTE (p. 71)
Used for...

Use a 13.8 V DC power supply with at least 3 A ca-
pacity. when operating IC-703 with AC power. Refer
to the diagram below for connection.
CAUTION:
Before connecting the DC power cable, check the
following important items. Make sure:
• The [POWER] switch is OFF.• Output voltage of the power source is 9.0–15.8 V
when you use a non-Icom power supply.
• DC power cable polarity is correct.
Red: positive (+) terminal, 
Black: negative (–) terminal
DC Power supply connections
15
2INSTALLATION AND...