Maintenance And Troubleshooting; General Maintenance - Furuno FM-4800 Operator's Manual

14. MAINTENANCE AND
TROUBLESHOOTING
Warning
Do not open the equipment. This equipment uses high voltage that can cause
electrical shock.
Note
Do 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.

14.1 General Maintenance

Caution
The heat sink can get hot enough to cause a burn injury. Allow the unit to cool
before doing any maintenance procedures.
The inherent quality of the solid-state components used in this radio should provide
many years of continuous use. However, take the following precautions to prevent
damage to the radio.

Keep the microphone connected or the jack covered at all times to prevent
corrosion of electrical contacts.

Remove dust from the cabinet with a dry clean cloth. Do not use commercial
cleaners 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 press and hold the PTT key and talk into the microphone to transmit your
voice unless an antenna or suitable dummy load is connected to the radio.

The supply voltage range to the radio must be within 10.8 to 15.6 VDC.

Use only FURUNO-approved accessories and replacement parts.

In the unlikely event of serious problems, please contact your dealer.
91