ICOM IC-703 用户手册
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.
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:
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
Black: negative (–) terminal
■DC Power supply connections
15
2
INSTALLATION AND CONNECTIONS
■Battery connections
■DC Power voltage
Depending on the applied voltage from the connected
power supply, a boarder voltage of 11.0 V is set as the
point where the IC-703 switches between normal op-
erating mode (over 11.0 V), and battery operating
mode (under 11.0 V: power save mode).
power supply, a boarder voltage of 11.0 V is set as the
point where the IC-703 switches between normal op-
erating mode (over 11.0 V), and battery operating
mode (under 11.0 V: power save mode).
However when the connected voltage decreases from
13.8 V to 11.0V, the IC-703 switches from normal
mode to battery mode. Conversely the IC-703
switches back to normal mode from battery mode
13.8 V to 11.0V, the IC-703 switches from normal
mode to battery mode. Conversely the IC-703
switches back to normal mode from battery mode
when the voltage reaches 11.5 V. This 0.5 V voltage
difference prevents irregular switching between nor-
mal mode and battery mode, caused by the voltage
drop which are current capacity, receiving or transmit-
ting.
difference prevents irregular switching between nor-
mal mode and battery mode, caused by the voltage
drop which are current capacity, receiving or transmit-
ting.
When 11.3 V voltage is applied, the IC-703 may acti-
vate the battery operating mode depending on the
current capacity of the power supply.
vate the battery operating mode depending on the
current capacity of the power supply.
AC cable
AC
outlet
A DC power
supply*
*13.8 V; at least 3.0 A
continuous
continuous
Black
_
Red
+
CONNECTING A DC POWER SUPPLY
CONNECTING PS-125 DC POWER SUPPLY
PS-125
DC power cable
Ground
4 A fuses
Transceiver
to DC power
receptacle
receptacle
Supplied
OPC-1229
OPC-1229
Optional
OPC-1248
OPC-1248
Connect to an AC
outlet using the
supplied AC cable.
outlet using the
supplied AC cable.
•
RWARNING NEVER
connect to a battery
without supplied DC fuse, otherwise a fire hazard
occur.
occur.
•
NEVER connect the transceiver directly to a
24 V battery.
24 V battery.
•
DO NOT use the cigarette lighter socket for power
connections. (See p. 7 for details)
connections. (See p. 7 for details)
•
Attach a rubber grommet when passing the DC
power cable through a metal plate to prevent a
short circuit.
power cable through a metal plate to prevent a
short circuit.
Grommet
CONNECTING A VEHICLE BATTERY
Note:
Use terminals for
the cable connections.
Crimp
Solder
Supplied
DC power cable
DC power cable
red
black
12 V
battery
battery