9.10 Fusing Unit
• After the oil supply unit is removed and reinstalled, oil marks might appear on copies. This is due to the toner built up on
the edges of the blades. If this occurs, replace the fusing blade, metering blade, and oil supply pad with new ones as a
set.
• To avoid spilling the silicon oil, do not tilt the unit.
• Fit the oil supply pad and soak it with silicon oil so its surface is coated sufficiently. If coating is not sufficient, the fusing
roller will be damaged.
• Clean the oil pan using a dry cloth every 200K copies. At the same time, check the oil hoses, drains in the oil pan, oil exit
from the unit, and oil receiver of the main body side to make sure that the oil passes through smoothly.
• If inside of the oil tube going to the oil tank becomes very dirty, the tube might clog and oil might overflow from the oil
receiver. If the oil does not pass through smoothly, replace the tube with a new one. At the same time, clean or replace
the oil tank with a new one to prevent dirty oil from circulating. If paper generating a lot of paper dust is used, replace the
tube and oil tank every 1,000K copies.
• To prevent damage of parts, grasp the front grip and rear upper edge of the unit frame when you lift the unit.
• Be careful as there is a projection for the oil returning guide at the bottom of the unit. Set the oil returning guide aside from
the work table.
• Do not touch the heater glass surface and handle it carefully to prevent damage.
• Do not adjust the fusing temperature when referring the value displayed on the service tool [5-03] screen. It does not
shown the actual fusing temperature. The displayed value shows what fusing temperature the CPU takes at the moment.
The displayed value will return to the standard value a few minutes later.
• Because the slide guides have sharp edges, keep them in the main body while servicing.
9.11 Duplex/Exit Unit
• Do not move the side fences manually. The timing belt behind the fences might slip out of the pulleys.
• Avoid touching the surface of new duplex feed and reverse rollers.
• Because the torque limit pressure is properly adjusted, do not loosen the torque limiter stopper Allen screws.
• When reinstalling the lock lever assembly of the horizontal transport unit, be sure that the assembly completely locks the
upper guide plates and that the lock lever bracket pushes down the upper left paper guide plate of the unit. Otherwise,
paper misfeeds might occur there.
• Before this adjustment, you should finish the adjustments of the side-to-side registrations in the front side copy for all paper
trays.
9.12 ADF
• The ADF rear cover is made of metal. So, the cover may touch electric elements on the boards shoring them out when
you remove the cover. Be sure to turn off the main switch when you remove the ADF rear cover.
• Before adjusting the side-to-side registration in the ADF/SADF modes, adjust the side-to-side registrations for all paper
trays and for the front and back side copies.
• Before adjusting the leading edge registration in the ADF/SADF modes, adjust the leading edge registrations in the platen
(not ADF and SADF) mode.
1 July 1994 Fusing Unit
9-5
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