Kongsberg Simrad RA83 Instruction Manual page 4

Preface RA83/84/85/93/94/95 Series
Operation Manual
before accessing the internal circuitry and discharge any residual voltages in
capacitors by an appropriate method. Only qualified personnel should attempt these
maintenance procedures.
MAINTENANCE SAFETY
Beware of residual high voltages:
High voltages may remain in the capacitors and the anode cap on the Cathode Ray
Tube several minutes after you have turned the power switch off. Wait at least five
minutes or discharge them to ground before starting your inspection.
Make sure the main power supply is OFF:
To prevent an electrical injury due to erroneous power switching, make sure that the
main power supply and the system power switch are both OFF. Also attach a safety
label showing that service is in progress.
Avoid inhaling dust:
The dust could be a temporary health hazard. When cleaning inside of the equipment,
avoid inhaling the dust.
Avoid static electricity:
Take care not to damage the ESDs (Electrostatic Sensitive Devices) due to static
electricity from carpet and cloths.
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