Furuno GP-1650W Operator's Manual page 82

12. MAINTENANCE & TROUBLESHOOTING
Keyboard test
This test checks all controls for proper
operation.
1. Press the [MENU] followed by the
CONFIGURATION, SYSTEM MENU and
SELF TEST soft keys to display the
TEST menu.
2. Press the KEYBOARD TEST soft key to
display the screen for testing the
keyboard.
PRESS
"CLEAR" KEY
3 TIMES
TO RETURN.
Keyboard test
3. Press each key one by one. The pressed
key's on-screen location turns black if the
key is functioning properly.
4. To escape, press the [CLEAR] key three
times.
Display test
1. Press the [MENU] key followed by the
CONFIGURATION, SYSTEM MENU and
SELF TEST soft keys to display the
TESTmenu.
2. Press the TEST PATTERN soft key to
open the test pattern display.
3. Press the [ENTER] key to change the
test pattern.
12-4
KEYBOAD
TEST
TEST PATTERN
RED
WHT GRN BLU
PRESS "ENTER" TO CHANGE PATTERN
WHT
RED
GRN
BLU
BLK
Display test pattern
BLK
RETURN