Troubleshooting - Furuno MU-170C Operator's Manual

Fuse replacement
The fuse in the fuse holder protects the equipment from internal fault. If the fuse blows, find
the cause before replacing it. If the fuse blows again after replacement, request service.
WARNING
Use the proper fuse.
Use of a wrong fuse can cause fire or
damage to the equipment.
Battery replacement
The remote controller has two AA
batteries. If the distance from which the
remote controller can be operated has
decreased, change the batteries.
Note: Use the two AA batteries. Replace
all batteries together. Do not mix
old and new batteries.
LCD replacement
The life of the LCD is about 40,000 hours. When the brilliance cannot be raised sufficiently,
replace the LCD.

5.2 Troubleshooting

The table below provides troubleshooting procedures to use when no picture appears. If
you cannot restore the picture, do not attempt to check inside the equipment – there are no
user serviceable parts inside. Refer any work to a qualified technician.
Ship's battery voltage too high.
Fuse has blown.
Cable between MU-170C and external
equipment has loosened.
Power cable has loosened from the
terminal board.
Troubleshooting table
Reason for no picture
Ship's power source
12 VDC
24 VDC
WARNING
Ensure battery polarity is correct.
Wrong polarity may cause the batteries
to explode.
Dispose of used batteries as industrial
waste. Follow the appropriate regulations
for the disposal of industrial waste.
Remedy
Check battery voltage.
Replace fuse.
Refasten cable. You can
confirm which signals are
currently input in the
SYSTEM menu (see the
figure on the next page).
Refasten cable.
19
Rating of fuse
10 A
5 A