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4-11
FS-1010
(4) Transfer
The image developed by toner on the drum A is transferred onto the paper because of the electrical
attraction between the toner itself and the transfer roller B. The transfer roller is negatively biased
so that the positively charged toner is attracted onto the paper while it is pinched by the drum and
the transfer roller.
Figure 4-1-9 Transfer
The nominal transfer bias is set to approximately -1.8 kV (limit) with the -6 µA current. Since the
ideal potential of the transfer bias depends on the thickness of paper, the bias is raised to approximately
-2.5 kV/-6 µA for thicker paper. On the other hand, the bias current is reduced to -1.8 kV/-6 µA for
thin paper.
A
B
High voltage board
HVISEL
THVDR
PSEL1
Transfer bias
Bias
board
YC1-A7
YC1-A5
RTHVDR
YC1-A5
YC1-A8
PSEL2
YC1-A8
YC-T
Engine board
YC11-9
YC11-12
YC12-2
YC11-14
YC11-7