
WARNING HIGH VOLTAGE! NEVER
WARNING HIGH VOLTAGE! NEVER
touch the antenna easily during transmission.
This may result in an electrical shock or burn.
re or damage the repeater.
apply more than 16 V DC, such as a
using or placing the repeater in areas
with temperatures below –30°C (–22°F) or above
putting anything on top of the repeater.
This will obstruct heat dissipation.
The heatsink will become hot
when operating the repeater continuously for long
series may damage the repeater.
This repeater is intended for use
The Icom America Systems logo is a trademark
The Icom America Systems logo is a trademark

Thank you for purchasing this Icom America
With proper care, this product should provide
you years of trouble-free operation.
20 W continuous full duty cycle operation
This repeater looks as good as it performs.
Automatic battery backup system
A built-in backup system supports automatic
V DC) if the AC power supply fails.
Multiple CTCSS & DTCS tone memories
The following accessories are supplied with
AC power cable (OPC-510) ….............……… 1
Spare fuses (FGB 20A) ………..……….…… 1

MICROPHONE/SPEAKER CONNECTOR
This 8-pin modular jack accepts the optional
Adjusts the audio output level.

The above functions depend on
connect non-speci ed microphones.
The pin assignments may be different and
the transceiver may be damaged.
Lights red: while transmitting
Blinks orange (green and red blink simultaneous-
Green and red blink alternately: cloning error
ACTIVATED KEY INDICATOR (LP 0/1/2)
battery voltage is not too high.
Indicates the operating channel.
Blinks when receiving a signal during
All LEDs blink while entering the power

Toggles to turn the repeater power ON or
TRANSMIT ANTENNA CONNECTOR [TX/
When installing an optional internal
ACCESSORY CONNECTOR [ACC]
RECEIVE ANTENNA CONNECTOR [RX]
When installing an internal duplexer
(supplied by third party), do not use this
to prevent electric shocks, TVI, BCI and other
DC POWER INPUT TERMINALS [BATTERY
short the (+) line of the

TX and RX to the transmit frequency
Go to LMR>Common>Expert, set RX EXO to ON

Transmit Data Input, TX Unit
Transmit Data Input, RX Unit

After unpacking, immediately report any damage
to the delivering carrier or dealer. Keep the
transmission line should be a coaxial cable.
A duplexer is separately required when only
transmitting and receiving frequencies. Ask your
To prevent electrical shock, television interference
TYPE-N CONNECTOR INSTALLATION EXAMPLE
TYPE-N CONNECTOR INSTALLATION EXAMPLE
30 mm ≈ 9⁄8 in 10 mm ≈ 3⁄8 in 1–2 mm ≈ 1⁄16 in

INSTALLATION AND CONNECTIONS 2
for installing an internal

when connecting an AC power cable or a backup
The CY-F121S/221S series can operate with an
AC or DC power supply. If AC power is interrupted
when operating the repeater with an AC power
If turning the repeater OFF using the
turning it back ON. Otherwise, Logic circuits
Voltages greater than 16 V DC
will damage the repeater. Check the source
voltage before connecting the power cable.
the repeater. Lead-acid batteries should be
the connection and be sure both the positive
When connecting to the battery, connect the
the positive (red) terminal and negative
INSTALLATION AND CONNECTIONS 2

Turn the repeater upside down.

Take the microphone off hook.
Wait for the channel to become clear.
To maximize the readability of the transmitted
the microphone at a normal voice level.

try to nd the source of the problem, and replace
the damaged fuse with a new, rated fuse.
the repeater. Otherwise, there is danger of
The left fuse, as pictured, is for repeater TX
The right fuse is for repeater RX”

300 Hz to 2550 Hz [Narrow]
4W typical at 10% distortion

300 Hz to 2550 Hz [Narrow]
3% typical at 1 kHz , 40%
4W typical at 10% distortion