OKIDATA ML393C Plus, Руководство по обслуживанию

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Machine Oil
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 main control board, be sure to remove any socketed PROMS and EEPROMS.
Replacement printed circuit boards are shipped WITHOUT these items.
When removing PROMs and EEPROMs, you MUST follow standard Electrostatic Sensitive Device (ESD)
safety precautions or you may damage the components.
12. Perform the line feed belt tension adjustment when any of the following occur.
Erratic line spacing occurs
Parts are replaced
Line Feed Belt (3.2.09 ).
13. Perform the color adjustment when any of the following occur.
Colors "bleed" into one another
Parts are replaced
Ribbon Shift Cam and Ribbon Shift Gear (3.2.27 )
Ribbon Shift Cam Lever Assembly (3.2.28 )
14. Perform the printhead gap adjustment procedure (Refer to Section 3.3 of this Service
Handbook
) when any of the following occur.
Poor Print Quality
Uneven Print Quality (darker on one side of the document).
Excessive wear on the printhead or platen
Parts are replaced
Printhead (3.2.01 )
Platen Assembly (3.2.09 )
Space Motor Assembly (3.2.14 )