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The unit can be powered by batteries or a car battery.
The unit has three transmission modes: the Basic mode, Group Talk mode and the Search mode. The explanation here is for the Basic mode. For the
Each press of MODE will change the transmission mode as follows:
Hold down TALK.
The unit searches for an unused channel. When the unit finds an unused channel, it rings and sends off a call signal to other members of your group. Stops at an unused channel... ... and sends out the call signal.
Installing Batteries (See
other transmission modes, see âSwitching transmission modesâ.
Group Talk mode
Size AA (R6)
Flip up the antenna and detach the belt clip if attached before inserting the batteries.
For the Basic mode, you first need to decide on a channel number with the member(s) of your group.
Open the lid of the battery compartment. Insert three size AA (R6) batteries (not supplied) with correct polarity as shown in the illustration.
Preparation (See Fig. C)
Flip up the antenna.
The antenna rotates 180 degrees. Adjust the antenna so that it is vertical to the ground.
Decide on a channel number (1 to 14) with the member(s) of your group. Press MODE repeatedly so that neither nor is displayed.
The unit goes into the Basic mode.
Switch CH/GROUP to CH and press +/â to select the channel. Transmit.
Example: When using channel number 5
Close the lid.
Press POWER to turn on the power.
If âHâ is displayed, key protection is active. Press LIGHT/BATT/H for 2 seconds or longer to disable key protection.
Release TALK when your unit rings.
The ring will continue for about 10 seconds. To stop the call signal manually, press TALK again. The ringing will stop.
Using size AA (LR6) Sony alkaline batteries: Approximately 40 hours*
* Battery life when the unit is used continuously, repeating sets of 30-second transmission, 30To DC IN 4.5V To a cigarette lighter socket second reception, and a 9-minute Power-Save standby. Battery life varies with temperature conditions, and may be shorter especially in colder areas.
Press MODE repeatedly so that neither nor is displayed.
The unit goes into the Basic mode.
When you receive the call signal Your unit switches automatically to the same channel with the unit that sent the call signal, and will ring. The ring will continue for about 10 seconds.
Switch CH/GROUP to CH, and press +/â to select the channel.
Set the unit to the same channel as your group member(s). Each press of + or â will increase or decrease, respectively, the channel number by one. Hold down either button to change the channel continuously.
When to replace the batteries
When n flashes in the display, replace all three batteries with new ones.
When the batteries have been replaced
Your current channel and group number setting will be erased. Set them again.
You can talk with anyone with a Sony or other FRS two-way radio that is within the effective range and is set to the same channel . In the Basic mode, you can hear transmission by any other two-way radio on the same channel that is within the effective range.
Receives the call signal... ... and stops at the same channel as the caller.
Transmission (See Fig. D)
To transmit, hold down TALK and speak into the MIC (microphone).
Keep the MIC at about 2 inches from your mouth and speak in your normal voice. During transmission, the transmission status indicator will repeat the following indication.
POWER Antenna MODE
To check battery power
Press LIGHT/BATT/H lightly (shorter than 2 seconds) when the power is turned on. The battery power indication will light up for about 15 seconds, and then disappear. Press again to turn off the display manually. Battery power is sufficient.
Group Talk mode
In the Group Talk mode, the unit communicates only with other units that are on the same channel and the same group number. Let the ring sound for about 5 seconds, then hold down TALK to respond. â¢ If you do not answer the call while the unit is ringing, the unit goes back to Search standby status. When the transmission is terminated, the unit goes back to Search standby status in about 10 seconds. Note The Search system does not work with models other than the ICB-U655.
Decide on a channel number (1 to 14) and a group number (1 to 38) with the member(s) of your group. Press MODE repeatedly so that is displayed and is not displayed.
The unit goes into the Group Talk mode.
Battery power is decreasing.
To receive, release TALK.
Adjust the reception volume with VOL.
There is little battery power. The battery warning beep will start to sound.
3 4 5
Replace the batteries.
To continue transmission
Repeat the steps for transmission above. Notify the person at the other end that you are switching to reception with the word âoverâ. Then, release TALK. When the person on the other end finishes with âoverâ, hold down TALK again to respond.
When the radio turns off unexpectedly
If there is no reception for 6 hours, or if you did not press any key (except LIGHT/BATT/H) for 6 hours, the unit will beep several times and then shut itself off to prevent unnecessary wear of the batteries (Auto Power Off function). To turn the unit on again, press POWER. If the power does not turn on by pressing POWER, or if the radio turns off unrelated to the Auto Power Off function, the batteries are exhausted. Replace them with new ones.
Switch CH/GROUP to CH and press +/â to select the channel. Switch CH/GROUP to GROUP and press +/â to select the group number. Transmit.
Example: When using channel number 3, group number 38.
Two-way radios can only locate other units that are on the same channel. Please note that the frequency range may differ with the model of the two-way radio.
On effective range
The effective range of the unit depends upon operating conditions, but should cover about 2 miles in suburban areas, with full battery power. Clarity of transmission may worsen at locations with heavy car or railroad traffic.
On the Power-Save mode
When there is no reception for about 8 seconds during the reception mode, the unit automatically goes into the Power-Save mode, and will consume less battery power. The unit will automatically exit the Power-Save mode when there is reception.
When there are a number of groups on the
On transmission modes, channel and
When the unit is turned on by pressing POWER, the transmission mode, channel and group number settings for the previous transmission will be displayed. If, however, the batteries have been replaced or the car battery cord have been plugged or unplugged from the DC IN 4.5V jack since the last transmis-
Car battery (See Fig. B)
Connect the recommended Sony car battery cord (not supplied). â¢ For details, see the Operating Instructions of the car battery cord. â¢ The display will light up when the unit is powered by the car battery. â¢ When the DC IN 4.5V jack is not being used, close the rubber cap securely to ensure waterresistance. Notes â¢ The unit will not run on batteries as long as the DC IN 4.5V jack is plugged in.
To end transmission
Notify the person on the other end that you are ending the transmission with the word âoutâ. Press POWER to turn off the power. If âHâ is displayed, press LIGHT/BATT/H for 2 seconds or longer to disable key protection, and then turn off the power.
same channel, you can block out transmission of other groups by switching to the Group Talk mode. (Transmission of other groups may still interfere, however, if the other groups use the same channel and group number).
group number settings
MIC SP jack @ jack VOL
In the Search mode, the unit will search for an unused channel and call up the members of your group (i.e., other users with their ICB-U655s set to the Search mode and to the same group number). After first setting the group number, you need to initiate Search by sending the call signal. Setting the group number
sion, the channel and group number may change to 1. Notes â¢ You cannot transmit and receive at the same time on this unit, as with telephones. â¢ Do not touch the antenna during operation, as this may reduce sensitivity.
To use a speaker microphone or an earphone
Connect an optional speaker microphone to the MIC SP jack. Connect an optional earphone to the @ jack (see the respective Operating Instructions for details). Notes â¢ Do not plug in any other equipment than the recommended Sony U-ceiver accessories (not supplied) to the MIC SP or the @ jack even if the plug seems to be similar, as it may cause damage to the unit. â¢ When the jacks are not in use, close the rubber cap securely to ensure water-resistance.
â¢ Use only the recommended car battery cord. Using any other car battery cord may cause damage to the unit.
Decide on a group number (1 to 38) with the members of your group. Press MODE repeatedly so that both and are displayed.
The unit goes into the Search mode.
Press LIGHT/BATT/H for 2 seconds or longer while the power is on.
âHâ will light up in the display, and the unit will not accept any key operation than the TALK button and this key. â¢ If LIGHT/BATT/H is pressed for 2 seconds or longer while the power is off, the unit will be protected from turning on accidentally. â¢ Press LIGHT/BATT/H again for 2 seconds or longer to disable key protection. âH â will go off in the display, and the unit will accept all key operation once again.
Switch CH/GROUP to GROUP and press +/â to select the group number.
Example: When using group number 38.
Polarity of the plug
Switching transmission modes
This unit has three transmission modes. Select according to situation.
Basic mode When there is no intereference. The channel number will go into the Search standby status, and the segments of the channel number display will light up in a rotating motion. Group Talk mode When there is interference by other groups using the same channel. Search mode When you have trouble finding an unused channel.
Attaching the belt holder
(See Fig. E)
Screw the belt holder onto the main unit as shown in the illustration.
Select either vertical or horizontal position.