Furuno FAR-2107 Series Service Manual page 357

Hazardous Voltage
This equipment uses high voltage electricity which can SHOCK, BURN or use
DEATH. Always make sure the electrical power is turned off before attempting to
change a component or inspecting the inside of the equipment. A residual
charge may exist in capacitors, even with the equipment turned off. Always short
all supply lines to the chassis with an insulated screwdriver or a similar tool
before touching the circuit.
Working on the Scanner Unit Mast
Work on the scanner unit mast is dangerous, and doubly so if the proper
precautions are not taken.
1. Post an appropriate warning sign near the display unit to indicate that work
on the scanner unit is being performed, to prevent accidental application of
the power to the scanner unit.
2. Wear a safety helmet and always be aware of where the scanner radiator is.
How to provide transmission with antenna revolution stopped
1. Press the [MENU] key 5 times while pressing the [1/HL OFF] key to enter the
[INITIALIZE] menu.
2. Set "TX" in "[MENU] -> 0 -> 3 -> 6: ANT STOP STBY/TX".
3. When the checking is complete, return the setting back to "STBY".
Chapter 6. Maintenance
DANGER
6-1
6.1 Self-test