Furuno FCR-2107 series, Operator'S Manual

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22. Maintenance and Troubleshooting
22-12
6. Click the Control Head button to show the control head checking screen.
7. Push each key, button and scrollwheel. The perimeter of the on-screen key, button or scrollwheel blackens if the
pushed item is functioning normally. (For the palm control-type Control Unit, push the hot keys; their on-screen
location is in the Control unit window.)
8. Operate radar-related controls (EBL and VRM rotary encoders, A/C RAIN, A/C SEA and GAIN). The figure in
the corresponding on-screen location becomes larger or smaller with control operation.
9. Operate the trackball. The trackball’s X and Y location is shown in the X and Y boxes.
10. Spin the scrollwheel. Confirm that the figure in the box above the scrollwheel’s on-screen location becomes
larger or smaller with scrollwheel operation.
11. Click the ALERT BUZZER ON button. Confirm that the buzzer sounds. Click the button again to silence the
buzzer.
12. Click the SYSTEM FAILURE OFF button. Thirty seconds after the button is clicked the buzzer sounds and the
SYSTEM FAILURE key flashes. Click the button again to stop the flashing and silence the buzzer.
14. Click the Exit Test button to quit the test.