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3.1.03 Maintenance Precautions
1. Do not disassemble the unit if it is operating normally.
2. Before starting disassembly and assembly, always power OFF the unit and detach the AC power
cord.
3. Detach the interface cable, if installed.
4. Do not remove parts unnecessarily. Try to keep disassembly to a minimum.
5. Use the recommended maintenance tools.
6. When disassembling, follow the listed sequence. Failure to follow the correct sequence may result in
damaged parts.
7. Since screws, collars and other small parts are easily lost, they should be temporarily attached to the
original positions.
8. Use extreme care when handling circuit boards. Integrated circuits (microprocessors, ROM, and
RAM) can be destroyed by static electricity.
9. Do not place printed circuit boards directly on conductive surfaces.
10. Follow the recommended procedures when replacing assemblies and units.
11. When replacing the system board, be sure to remove the socketed EPROM.
Replacement printed circuit boards are shipped
When removing the EPROM, you
precautions or you may damage the components.
12. When replacing the system board, be sure to perform the printhead alignment.
Refer to Section 3.3 of this Service Handbook of the Users Guide for details
13. Perform the printhead alignment when any of the following occur.
Poor Print Quality
Misaligned Print Quality
Parts are replaced
Print Cartridge
(Refer to 3.7
System Board
(Refer to 3.2.33
Service Guide OJ2010
Chapter 3 Maintenance and Disassembly
WITHOUT
MUST
follow standard Electrostatic Sensitive Device (ESD) safety
)
)
this item.
Page: 56
.
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