General Maintenance; Troubleshooting - Furuno FM-4721 Operator's Manual

7. MAINTENANCE,

TROUBLESHOOTING

WARNING
ELECTRICAL SHOCK HAZARD
Do not open the equipment.
This equipment uses high
voltage that can cause
electrical shock.
0nly qualified persons can
work inside the equipment.
7.1

General Maintenance

The inherent quality of the solid-state components used in this transceiver should pro-
vide many years of continuous use. However, take the following precautions to pre-
vent damage to the transceiver.
• Keep the microphone connected or the jack covered at all times to prevent corro-
sion of electrical contacts.
• Remove dust from the cabinet with a dry clean cloth. Do not use commercial clean-
ers to clean the equipment. Those cleaners can remove paint and markers.
• Check that all cables are tightly fastened. Check the cables for corrosion and rust.
Connect the cables that have loosened. Replace any damaged cables.
• Never key the microphone unless an antenna or suitable dummy load is connected
to the transceiver.
• The supply voltage range to the transceiver must be within 10.8 - 15.6 VDC.
• Use only FURUNO-approved accessories and replacement parts.
• Wipe the LCD carefully to prevent scratching, using tissue paper and an LCD clean-
er. 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
does not scratch the LCD. Do not use solvents such as thinner, acetone or benzene
for cleaning.
• In the unlikely event of serious problems, please contact your dealer.
www.busse-yachtshop.de | info@busse-yachtshop.de
CAUTION
The heatsink can get hot enough to cause a
burn injury. Allow the unit to cool before do-
ing any maintenance procedures.
NOTICE
D
o not apply paint, anti-corrosive
sealant or contact spray to plastic
parts or equipment coating.
Those items contain products that can
damage plastic parts and equipment
coating.
7-1