Toshiba E-STUDIO520, Руководство по обслуживанию, Страница: 327 / 592

March 2005 © TOSHIBA TEC e-STUDIO520/600/720/850 PREVENTIVE MAINTENANCE (PM)
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2) Checking
- Check for stain and damage to the fuser and pressure rollers and clean or replace if necessary.
If marks made by the separation fingers have become distinct, open the fuser unit cover and
move the position of the E-ring by sliding the upper separation finger unit to the direction of the
thick arrow in the figure. The separation fingers thus contact with the different position on the
fuser roller. In case there is any scratch which may cause a printing problem or the coating of the
roller is removed, replace the roller.
Fig.4-32
- Clean the upper/lower separation fingers and check for chipped claws.
- Check the cleaning condition of the cleaning web (kinks, lines and slacks on the cleaning web).
- Clean the thermistor and check proper contact with the fuser roller.
- Check the fused condition of the toner image.
- Check the gap between the lower entrance guide and pressure roller (do not make them touch
each other).
- Check the gap between the fuser roller and thermostat (2~2.5mm).
- Check the fuser and pressure rollers for proper rotation.
- Check the fuser and pressure rollers for bearing.
- Check the fuser roller drive gear and cleaning web drive gear
- Check the web motor lubrication to the warm gear (white molykote).
3) Cleaning procedure for fuser roller
When the fuser roller becomes dirty, it will cause paper jamming. If this happens, wipe the roller sur-
face clean with cotton moistened in alcohol. For a better cleaning effect, clean the roller when it is
still warm.
Note: Note:
Be careful not to rub the teflon-coated surface with your fingernails or hard objects because it is
easily damaged. Do not apply the silicon oil to the fuser roller.
E-ring
Upper separation
finger unit