2FP/2FY/2FR
2-1-16
(4) Transfer
The image developed by toner on the drum is transferred onto the paper because of the electrical attraction between the
toner itself and the transfer roller. 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 2-1-16 Transfer
The nominal transfer bias is set to approximately -2.3 kV (limit). Since the ideal potential of the transfer bias depends on
the thickness of paper, the bias is raised to approximately -2.6 kV for thicker paper. On the other hand, the bias current is
reduced to -2.1 kV for thin paper.
S
S
N
Transfer roller
Drum
Voltage
Paper type
Transfer
bias
output
Transfer bias
output
High
voltage
unit
CN2-13
TR
TRCHON*
Engine
board
YC5-6
Normal
-2.3 kV
Thick
-2.6 kV
Thin
-2.1 kV
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