APX
TM
 7500 O5 
12 
Index 
Preparing Your Radio for Use 
 Turning on the Radio 
Press the Power On/Off Button briefly to power on the 
radio. 
After a short time, the red, yellow and green LEDs light 
up. The display then shows Zone and channel text, and 
menu items display on the screen. 
The backlight will turn on to the last selected dim level. 
Note: Pressing the Power On/Off Button before the 
LED lights up will be ignored. 
 
If FAIL ##/## appears in the display, the radio will not 
function until the condition has been corrected. 
 
If ERROR ##/## appears, some non-critical data has 
been changed. 
If CH MISMATCH appears, means that either the 
Control Head has been connected to an incompatible 
transceiver, or vice versa. 
If your radio does not power up, contact your dealer. 
To turn off the radio, press the Power On/Off Button 
after the LEDs light up. 
Power On/Off Button 
Emergency Button