EQ42/50/52 Installation and service Chapter 9
65
Sources of noise to consider:
Water/air noise Acoustic noise Electrical noise
Air bubbles
Turbulence
Propeller
Main engine
Reduction gear
propeller shaft
Generators
auxiliary engines
Power plant for freezers
Hydraulic pumps
Rudder engine
Bow thruster
Stern thruster
Noise from electrical cables
Noise from generators
Poor grounding of instrument
Radiated noise from other
instruments
Dc – Dc converters
Electrical winches
Neon lights
etc.
9.8 Preventive maintenance
Surface cleaning – to keep the EQXX cabinet and display screen clean, wipe the
surfaces with a clean damp cloth. For heavier cleaning, use a clean, damp cloth
which has been dipped in a solution of a mild dish detergent and water. Wring
out firmly before wiping the unit.
Electrical connections – periodically check the electrical connections. Make
sure that connections are tight and that no cables are frayed or worn.
Transducer – periodically clean the face of the transducer with a plastic utensil
using a scrubbing action.
) Do not use a harsh abrasive or a solvent to clean the transducer.
9.9 Repair and service
The EQXX is sealed and does not contain any user serviceable parts. Opening of
this unit will void its warranty. If the EQXX requires servicing or repair, call
your authorized SIMRAD dealer, but first check section 9.10 Troubleshooting.
Spare parts – fuses may be bought from a chandlery or a marine supply store.
If you require a SIMRAD part, please contact your authorized dealer.
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