Furuno NX-300 - Manual (Page 43)

5-1
5. MAINTENANCE &
TROUBLESHOOTING
Do not open the equipment.
Only qualified personnel should work inside
the equipment. Further, watertightness may
be reduced.
WARNING
5.1 Maintenance
Check the following points regularly to maintain performance:
•
Check that connectors on the rear panel are firmly tightened and free of rust.
•
Check that the ground system is free of rust and the ground wire is tightly fastened.
•
Check that battery terminals are clean and free of rust.
•
Check the antenna for damage. Replace if damaged.
•
Dust and dirt on the keyboard and display screen may be removed with a soft cloth. Do not
use chemical cleaners to clean the equipment; they may remove paint and markings.
5.2 Diagnostic Test
The diagnostic test checks ROM, RAM, data port, battery, keyboard and LCD for proper
operation and displays program numbers.
1. Press the [MENU] key to open the main menu.
2. Press the ! or " to select SYSTEM MENU.
3. Press the [ENT] key to show the SYSTEM MENU.
4. Press ! or " to select TEST.
5. Press the [ENT] key. You are asked if you are ready to start the test.
Figure 5-1 TEST window
6. Press the # to select YES.