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Service Guide OL400
Chapter 3 Maintenance & Disassembly
3.1.03 Maintenance Precautions
DO NOT disassemble the unit if it is operating normally.
Before starting disassembly and assembly, always power OFF the unit and detach the
power cord.
Detach the interface cable, if installed.
Do not remove parts unnecessarily. Try to keep disassembly to a minimum.
Use the recommended maintenance tools.
When disassembling, follow the listed sequence. Failure to follow the correct sequence
may result in damaged parts.
Screws, collars and other small parts are easily lost. Temporarily attach these parts to
their original positions.
When handling circuit boards use extreme care. Integrated circuits (microprocessors,
ROM, and RAM) can be destroyed by static electricity.
Do not place printed circuit boards directly on conductive surfaces.
Follow the recommended procedures when replacing assemblies and units.
Clear the drum counter when a new drum cartridge is installed.
1.
Power OFF the unit.
2.
Press and hold RESET while powering ON the unit.
3.
The drum counter will reset.
Clear the fuser counter when a new fusing unit is installed. Refer to Section 3.3,
Adjustments in this Service Handbook.
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