E F Johnson Company 2425333 Benutzerhandbuch

To clean the Control Head:

1 Use the brush to remove the bulk of sand and dust from the Control Head.

Ensure that this is done in an environment that does not allow other equipment to be 
affected by the removed sand and dust. If necessary, use the vacuum to collect material as 
it is removed.

2 When the bulk of sand and dust is removed, use the brush to clean the interface joint 

between the buttons and Control Head plastic.

3 Position the vacuum nozzle two inches (or more, as required) from the face of the 

Control Head. Use the brush to remove any remaining sand and dust.

4 Repeat this procedure until the Control Head is completely clean.

A government license is usually required to operate this radio on the air.

If “UNPROGRAMD” is displayed, the cause can be any of the following:

• An unprogrammed channel is selected. Select a programmed channel.

• The selected channel is programmed for an option that is not installed or an error in 

programming was detected. Contact your system operator for service.

If no characters or all characters appear in the display, the viewing angle may be 
improperly adjusted. Refer to Section 3.3 for more information. If some other problem is 
occurring, turn power OFF and then ON again to reset the control logic. Also make sure 
that the controls are properly set and that the power, external speaker, and accessory cables 
(if used) are securely plugged into the back of the radio.

If the radio is completely inoperative, check the power cable fuse that is usually located 
near the vehicle battery. If it is blown, remedy the cause if possible and replace it with the 
same type (15A). If the radio still does not operate properly, return it to your system 
operator for service.