Mechanism - Ricoh MP C3004 Field Service Manual

7. Detailed Descriptions

Mechanism

Fusing system
No.
1 Fusing lamp (center)
2 Fusing lamp (edge)
3 Fusing belt
4 Shield
MP C4504/5504/6004: New QSU-DH (Quick Start Up-Direct Heat) fusing
This is a fusing unit with a soaking plate added to the pressure pad on the fusing nip.
In addition to the mechanism to efficiently heat the paper according to its width by rotating the
shield plate, a soaking plate to even out the temperature of the fusing sleeve in the longitudinal
direction is adopted.
It controls the shading position on 9 levels by adjusting the rotating time according to the paper
width after turning on the main power switch and after starting/finishing printing. The number of the
shield plate's position sensors has changed from 2 to 1.
The soaking plate on the nip (on the surface of the pressure pad) disperses the temperature
deviation between the front and rear parts of the fusing sleeve, so as to even out the temperature.
MP C3004/3504: E-QSU (Enhanced-Quick Start Up) fusing
This fusing unit has the soaking plate added to the pressure pad on the fusing nip and removed the
shield plate control.
1296
Description No. Description
5 Reflector
6 Soaking plate
7 Nip pad