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Chapter 4 Care and Maintenance
4.1
Notice before maintenance
In order to avoid secondary malfunction due to incorrect operation, the following warnings and precautions must be
observed during the disassembly and reassembling of the equipment.
Warning
After using the equipment for a while, the temperature of some parts inside the equipment is very high! When
opening the side door or the rear cover to repair parts inside the device, do not touch the parts shown in the
high temperature mark.
Be careful not to lose the removed screws, washers and other parts.
Be sure to apply grease to the parts specified in this chapter.
When using an electric soldering iron or other heating tools, please be careful not to damage the
wires, circuit boards, casings and other components made of synthetic resin.
The static electricity charged by the human body may damage electronic components. Therefore,
when transporting the circuit board, be sure to wrap the circuit board with conductive foil.
When replacing circuit boards and all other parts with circuit boards, please wear a wrist strap for
discharging static electricity and operate on an anti-static mat. In addition, please be careful not to
touch the flat cable and the electrode conductor part of the wire.
After unplugging the flat cable, be sure to check that the flat cable plug is in good condition and that the
flat cable is not short-circuited.
When inserting the flat cable, be sure to insert it straight, and check that the cable is not crooked after
inserting it.
When connecting or disconnecting the patch cord, do not hold the cable part but the connector
part. If there is a lock on the connector, be sure to unlock the lock first.
After repairing, please pay attention not only to check the repaired part, but also to check the
connection of the patch cord. In addition, you need to check if other related parts are working
properly.
Do not close the front cover forcibly before installing the toner cartridge and drum unit, otherwise the
machine may be damaged.
After installation, it is recommended to conduct an insulation withstand voltage test and a conductivity
test.
Be careful not to damage the insulating sheet.
When replacing the circuit board, be sure to check if there is any foreign matter on the component
surface and soldering surface of the circuit board.
Confidential
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