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
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GP-3300
FURUNO ELECTRIC CO., LTD
Figure 12-5 Test pattern 1
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.