Furuno GP-150 Installation Manual page 116

9. MAINTENANCE & TROUBLESHOOTING
Display test
1) Press MENU ESC, 8 and 3 to display the
test pattern screens.
2) To change the test pattern, press the
NU/CU ENT key. Each time the key is
pressed one of the patterns shown in
Figure 9-12 appears.
TEST PATTERN
ENT:Pattern MENU:Escape
Figure 9-12 Test patterns 1 and 2
3) Press the MENU ESC key.
9-6
Automatic testing
This feature conducts all self tests
continuously.
1) Press MENU ESC, 8 and 4. Self tests are
conducted continuously in the order of
memory, I/O test, keyboard test and test
pattern.
2) To stop testing, press the MENU ESC
key.
3) Press the MENU ESC key.