Furuno 1933C - Manual (Page 227)

7. MAINTENANCE, TROUBLESHOOTING
7-9
7.6.2 Test pattern
The test pattern test checks the display for proper display of colors.
1. Press the [MENU] key to show the menu.
2. Press the SYSTEM CONFIGURATION soft key.
3. Press the SYSTEM SETUP soft key.
4. Press the TEST & CLEAR soft key.
5. Press the TEST PATTERN soft key to show the test pattern.
6. Push the [ENTER] knob consecutively to show white, red, green, blue and
black colors individually.
7. Press the RETURN soft key.
8. Press the [MENU] key to close the menu.
WHT
BLU
GRN
BLK
RED
[ENTER] knob
[ENTER] knob
[ENTER] knob
[ENTER] knob
[ENTER] knob
[ENTER] knob
RETURN
GREEN
WHITE
BLACK
BLUE
GREEN
RED
PUSH ENTER KNOB TO CHANGE PATTERN.
RETURN
WHITE
Test pattern sequence