Ricoh SP 8400DN Field Service Manual page 1402

7.Detailed Descriptions
sleeve where paper does not pass by during a multi-page job using paper widths that are less than the full
width of the sleeve.
When handling an A3 (SEF) or A4 (LEF) sheet
A cylindrical-shaped light shielding plate [C] covers the ends [D] of fusing lamp [A] where paper does not
pass by, to prevent the temperature from rising at those places.
[A] Area where the fusing lamp lights up
[B] Print width of A3 (SEF) / A4 (LEF)
[C] Light shielding plates
[D] Areas where paper does not pass by and that would heat up without the light shielding plates
When handling an A4 (SEF) or smaller sheet
The machine lights up only the fusing lamp for center [A]. At this time, the temperature increases around the
area [D] where paper does not pass. This is the gap between the lit part of the fusing lamp [A] and the edge
of the sheet being fed.
To prevent the heating sleeve belt unit from damage caused by the temperature increase, heat conduction
plates [C] which are made of a highly heat conductive material are attached to the nip pad [B] to release the
heat.
[A] Area where the fusing lamp lights up
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Description
Description