JRC JLN-550 Instruction Manual page 7

Doppler sonar
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Contact our service center or agent for any electrical work or
installation of this unit. With the exception of qualified service
personnel, do not attempt to service this unit, as doing so may cause
malfunction.
Do not install this unit is exposed to direct sunlight for a long time or
the temperature rises above 55°C. Doing so may cause a fire or
electrical shock. (Expect Wing Display)
Do not place the unit on a wobbly stand or any unsteady foundation.
Doing so may cause the unit to fall resulting in injury or damage.
Do not bring the unit in a cooled state abruptly into a warm room. A
high voltage may leak due to condensation may result in failure. In
this case, use the unit set after leaving it alone for 30 min.
When installing this set, be sure to connect the grounding wire to the
grounding terminal of the unit. Otherwise, you may suffer an
electrical shock during a failure or leak.
Do not turn on the power switch of the unit while the ship is on the
shore. Otherwise, the transducer may malfunction.
Do not covering for the unit. Otherwise, fire hazards or system failure
can result from the heated set.
Reasonable care must be exercised for the routing of the transducer
cable, power cable and grounding cable. Otherwise, the unit may
adversely effect other equipment or vice versa.
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