Furuno Ls4100 User Manual download pdf (Page 29)

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4. The ROM, RAM and NMEA port are

checked, with the results shown as

OK or NG (No Good). For any NG,

request service. (A special connector

is required to test the NMEA port.

Nothing appears if no connector is

connected.)

5. The squares at the right side of the

test display are for checking the

controls. Press each key and the

arrows on the Cursor Pad one by

one. A control’s corresponding

on-screen square “lights” in black if

the control is normal.

6. To return to the Installation menu,

press the [MENU/ESC] key three

times.

7. To restore normal operation, turn off

the power and turn it on again.

3.8 Test Pattern

This feature tests for proper display of

tones.

1. On the Installation menu, press▼ to

choose LCD PATTERN.

2. Press ► to start the test. The entire

screen is black.

3 Press ► again and the screen turns

white.

4. Press ► again and the screen

shows a four-toned display.

5. Press ► again to return to the

Installation menu.

6. To restore normal operation, turn off

the power and then it on again.

WHITE FOUR-TONE

BLACK

Test patterns

3.9 Memory Clear

The memory can be cleared to start

afresh with default menu settings.

1. At the installation menu, press ▼ to

choose MEMORY CLEAR.

2. Press ► to open the options

window.

: YES

: NO

Clear memory display

3. Press ▲ to clear the memory. Beeps

are generated while the memory is

being cleared.

4. To restore normal operation, turn off

the power and then turn it on again.

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