Furuno 520 - Manual (Page 62)

6. MAINTENANCE & TROUBLESHOOTING
6-2
6.2 Replacement of Fuse
The fuse in the processor unit protects the equipment from reverse polarity of
the ship’s mains and equipment fault. If the fuse blows, the power cannot be
turned on.
Contact your dealer about replacement of the fuse.
CAUTION
Use the proper fuse.
Use of a wrong fuse can cause fire or
damage the equipment.
Parts Name Type Code No. Remarks
Fuse FGMB 4A AC125V 000-119-976 Supplied as spare parts
6.3 Diagnostics
The NAVpilot-511/520 has a diagnostic function which checks the Processor unit,
Control unit, Heading sensor, Keyboard, LCD and Rudder for proper operation.
To access a diagnostic function, do the following procedure:
1. Press the [TURN/MENU] key twice to show the menu.
2. Rotate the course control knob to select “TEST”.
3. Press the course control knob to show the test options window.
PROCESSOR UNIT
CONTROL UNIT
HEADING SENSOR
KEYBOARD TEST
SCREEN TEST
RUDDER TEST
OFF
Test options window
4. Rotate the course control knob to select an option.
5. Press the course control knob to start the diagnostic test.
6. Press the [MENU] key to finish.