JRC JMA-3300 Series Instruction Manual page 13

Marine radar equipment
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PRECAUTIONS
CAUTION
Make sure to take off your watch when your hand must get close
to the magnetron.
Failure to comply may result in damage to the watch since the
magnetron is a strong magnet.
Make sure that two or more staff member work together when
replacing the LCD.
If only one person attempts to replace the LCD, he/she may drop it
and become injured.
Do not directly touch the inverter circuit of the LCD display with a
bare hand since high voltage temporarily remains in the circuit
even after the main power is shut off.
Failure to comply may result in electrocution.
When cleaning the display screen, do not wipe it too strongly with
a dry cloth. Also, do not use gasoline or thinner to clean the
screen.
Failure to comply will result in damage to the screen surface.
xi

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