Furuno CH-37 - Manual (Page 80)

7-6
7.6 Test Pattern
This test checks display position and colors.
1. Turn on the power while pressing and holding down the
MENU key.
2. Select TEST PATTERN with the arrow keys in the sub panel
2.
3. Press the MENU key to start the test.
Position check
BLACK BLUE GREEN RED
Figure 7-5 Test pattern
4. To return to the SYSTEM menu, press the MENU key again.
5. To quit, reset the power.
7.7 Error Messages
Raise/lower error message
If the power is not applied to the hull unit, the following mes-
sage appears on the screen and the buzzer sounds.
HULL UNIT
POWER OFF
(CHECK BREAKER AND FUSE)
PRESS R/B KEY TO SILENCE ALARM
Figure 7-6 Raise/lower error message
If this occurs, turn the power off and check the breaker and
fuse as the screen suggests.