Image Creation Process - Konica Minolta bizhub C35 Service Manual

DRAFT
5. OVERALL COMPOSITION
5.2

Image creation process

Transfer belt cleaning
CCD (Photoelectric conversion)
[1]
CCD (Photoelectric
conversion)
[2]
Image processing board
[3] LD exposure
[4] PC drum
[5] PC drum charging
[6] Developing
[7] 1st image transfer
[8] 2nd image transfer
[9] Media separation
[10] Transfer belt cleaning
[11] PC drum cleaning
10
1st image transfer
Developing
LD exposure
Image processing board
• Light reflected off the surface of the original is converted to a corre-
sponding electric signal by CCD and the resultant electric signal is
sent to the image processing board.
• The intensity of the laser light is controlled based on the image sig-
nal transmitted to this board.
• The surface of the PC drum is irradiated with laser light, and an
electrostatic latent image is thereby formed.
• The image of the original projected onto the surface of the PC drum
is changed to a corresponding electrostatic latent image.
• Apply DC (-) charge to the photo conductor.
• The toner, agitated and negatively charged in the toner chamber, is
attracted onto the electrostatic latent image formed on the surface
of the PC drum. It is thereby changed to a visible, developed image.
• A DC positive voltage is applied to the backside of the transfer belt,
thereby allowing the visible, developed image on the surface of
each of the PC drums (Y, M, C and K) to be transferred onto the
transfer belt.
• A DC positive voltage is applied to the backside of the media,
thereby allowing the visible, developed image on the surface of the
transfer belt to be transferred onto the media.
• The media, which has undergone the 2nd image transfer process,
is neutralized so that it can be properly separated from the transfer
belt.
• The residual toner left on the surface of the transfer belt is scraped
off.
• The residual toner left on the surface of the PC drum is scraped off.
Theory of operation Ver. 1.0 Feb. 2010
Media separation
2nd image transfer
PC drum charging
PC drum
A0VDT2C592AA