User manual

Chapter 5: Operation of the 8580/8590
Operation
8580/8590 Vehicle-Mount Computer User Manual 53
5.1 Operation
The 8580/8590 is available with various types of front panels:
• 25-key front panel
• 10-key front panel
• 4-key front panel
5.2 4-Key Front Panel
An 8580/8590 with a 4-key front panel is equipped with the following controls:
• POWER ON/OFF toggle button to switch the unit on and off
• Manual brightness control indicated with the ‘+’ and ‘-’ symbols
• Backlight on/off toggle button (‘light bulb’ icon)
Note: All front panel buttons are described under “25-Key Front Panel” on page 55