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Safety Precautions for Inspection and Service
6
1.3 Other Precautions
• To reassemble the product, reverse the order of disassembly unless otherwise
specified.
• While the product is energized, do not unplug or plug connectors into the circuit
boards or harnesses.
• The magnet roller generates a strong magnetic field. Do not bring it near a
watch, floppy disk, magnetic card, or CRT tube.
• An air gun and vacuum cleaner generates a strong electrostatic charge that can
destroy the ATDC sensor and other sensors. Before cleaning a component with
one of these devices, be sure to remove all the sensors. Otherwise, use a
blower brush and cloth when cleaning parts.
• When handling circuit boards with MOS ICs, observe the “INSTRUCTIONS
FOR HANDLING THE PWBs WITH MOS ICs” (applicable only to the products
using MOS ICs).
• The PC Drum is a very delicate component. Observe the precautions given in
“HANDLING OF THE PC DRUM” because mishandling may result in serious
image problems.
• Note that replacement of a circuit board may call for readjustments or resetting
of particular items, or software installation.
• After completing a service job, perform a safety check. Make sure that all parts,
wiring and screws are returned to their original positions.
• Check the area surrounding the service site for any signs of damage, wear or
need of repair.
• Do not pull out the toner hopper while the toner bottle is turning. This could
result in a damaged hopper motor or locking mechanism.
• If the product is to be run with the front door open, make sure that the toner
hopper is in the locked position.