Furuno GD-3300 Operator's Manual page 120

12-4
2. Press each key one by one. If a key is functioning normally its
location on the display lights in light-blue while the key is pressed
and held.
3. After pressing all keys, press the [CLR] key three times to es-
cape.
Test pattern 1 (color dropout)
This test checks for color dropout.
1. Press [MENU], [9], [9] and [3] to select TEST PATTERN 1. The
display should look like Figure 12-5.
R G Y B P
E R E L P
D N L K L
GP-3300
FURUNO ELECTRIC CO., LTD
R G Y B P
E R E L P
D N L K L
2. Check the pattern for color dropout.
3. Press any key to escape.
Test pattern 2 (color distortion)
This test checks for color distortion.
1. Press [MENU], [9], [9] and [4] to select TEST PATTERN 2.
2. Press keys 1-8 one by one to check for proper display of colors.
3. Press any key except numeric keys 1-8 to escape.
L W
B
H
L
T
U
L W
B
H
L
T
U
Figure 12-5 Test pattern 1