Humminbird 4089901 Key Functions, POWER/LIGHT Key, Power On the control head:, Power Off the con trol head:

Key Functions

Your Fishfinder user interface c onsists of a set of ea sy-to-use keys that work with various on-screen views and menus to give you flexibility and control over your fishing experience.

POWER/LIGHT Key

The POWER/LIGHT key is used to power the Fishfinder on and off. You can also use t he POWER/LIGHT key to adjust the backlight and contrast of the display.

Power On the control head: Press the POWER/LIGHT key to power on the unit. When the Title screen is displayed, press the MENU key to access the Start-Up Options Menu.

Power Off the con trol head: Press and hold th e POW ER/LIGHT k ey f or 3 seconds. A message will appear to indicate how many seconds there are until shutdown o ccurs. To ensure that shutdown occurs pro perly a nd an y m enu settings will be s aved, your Fishfinder should always be turned off using the POWER/LIGHT key.

Adjust the B acklight or the Display Contrast: Press the POWER/LIGHT key to access the Light and Co ntrast s ubmenu. U se the 4 -WAY Cursor Control key to select Light or Contrast, and then use the LEFT or RIGHT Cursor key to change the settings. Press EXIT to exit the Light and Contrast submenu.

NOTE: Your 500 Ser ies™ Fishfinder wi ll s tart up with the backlight on and will automatically turn it off to conserve power.

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