Power/Lights On And Off - Eagle FISHMARK 640C Installation And Operation Instructions Manual

1. PWR/LIGHT (Power & Light) – The PWR key turns the unit on and
off and controls the backlight level.
2. PAGES – Pressing this and the ↑ and ↓ arrow keys switches the unit
between the three different page display options. (Full Sonar Chart,
Split Zoom Sonar Chart and Digital Data.)
3. MENU – Press this key to show the menus and submenus, which
allow you to select a command or adjust a feature.
4. ARROW KEYS – These keys are used to navigate through the
menus, make menu selections, move the chart cursor and enter data.
5. ENT (Enter) – This key allows you to save data, accept values or
execute menu commands.
6. EXIT – The Exit key lets you return to the previous screen, clear
data or clear a menu.
7. ALARM –The Alarm key is a shortcut to access the various sonar
alarms. Press this key once to open the Alarms menu.
8. ZOUT – (Zoom Out) – This key lets you zoom the screen out. This
key allows you to see the entire water column from surface to bottom.
9. ZIN – (Zoom In) – This key lets you zoom the screen in. This key en-
larges fish signals and bottom detail.

Power/lights on and off

To turn on the unit, press . As the unit powers up, the Full Sonar
PWR
Chart is displayed first.
To turn on the backlight, press again. The unit has three backlight
PWR
levels to select from. Repeatedly pressing will cycle through the
PWR
backlight settings and turn off the backlight.
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