Furuno MU-190 User Manual

Regular maintenance is important for good performance. Check the following on a regular basis 
to keep the equipment in good condition.

The fuse in the fuse holder at the bottom of the display 
protects the equipment from overvoltage and overcurrent. 
If the fuse blows, find the cause before you replace it. If the 
fuse blows again after replacement, request service.

The life of the LCD is approximately 50,000 hours. The actual number of hours depends on am-
bient temperature and humidity. When the brilliance cannot be raised sufficiently, replace the 
LCD.

The life of the each fan is shown in the table on the next page. The actual number of hours de-
pends on ambient temperature. When the fan does not rotate sufficiently, the message "FAN ER-
ROR" is shown. Turn off the power and call for service to request replacement of the fan.

•  Check that the connectors at the bottom of the monitor unit are tightly fastened.
•  Check the ground wire and ground terminal for rust. Clean if necessary. Confirm that the ground 

wire is tightly fastened.

•  Remove dust and dirt from the monitor unit with a dry, soft cloth. Do not use chemical cleaners to 

clean any part of the monitor unit. They can remove paint and markings.

•  Wipe the LCD carefully to prevent scratching, using an LCD cleaning cloth (supplied as accesso-

ry). To remove dirt or salt deposits, use an LCD cleaner, wiping slowly with tissue paper so as to 
dissolve the dirt or salt. Change paper frequently so the salt or dirt will not scratch the LCD. Do 
not use solvents such as thinner, acetone or benzene for cleaning. Also, do not use degreaser or 
antifog solution, as they can strip the coating from the LCD.

Glass Tube Fuse

FGBO 250V 1A PBF

000-155-828-10

Those items contain organic solvents that can damage coating 
and plastic parts, especially plastic connectors.

Use of a wrong fuse can cause 
fire or damage to the equipment.