Konica Minolta A00F011 Service Manual - Page 72
st transfer output control, 1st transfer roller pressure/retraction control, Monochrome mode, Color
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magicolor 4650EN magicolor 4650DN Theory of operation Ver. 1.0 Nov. 2007 13. Transfer section (1st transfer) 13.3 Operation 13.3.1 1st transfer output control • To transfer the toner image from the photo conductor to the transfer belt, the transfer voltage is applied to the 1st transfer roller. • A charge of the same potential is applied to each of the 1st transfer rollers. • The transfer voltage is applied after the 1st transfer roller/Y, M, C is pressed against the transfer belt for color mode. • The transfer output is turned OFF after the last image moves past the 2nd transfer sec- tion. 13.3.2 1st transfer roller pressure/retraction control • To extend the service life of the photo conductor/Y, M, C, the pressure position of the 1st transfer roller is changed between the monochrome mode and the color mode. The 1st transfer roller/K is not provided with a retraction mechanism; the transfer belt is pressed against the photo conductor/K at all times. • The Transport motor provides the drive for pressure/retraction operation of the 1st transfer roller/Y, M, C. A. Monochrome mode • The 1st transfer roller/Y, M, C is moved inward the unit (for retraction) and the photo con- ductor/Y, M, C is stopped. The transfer roller is moved (retracted) and the photo conductor is stopped also in the ordinary standby state. B. Color mode • During the 1st transfer in the color mode, the 1st transfer roller/Y, M, C is moved toward the photo conductor (pressed) so that transfer belt is pressed against the photo conductor. C. Others • The transfer roller is moved (retracted) and the photo conductor is stopped in the ordi- nary standby state. Composition/Operation 37