Brother MFC-9420CN Service Manual page 37

(2) Basic Color Printing Process
1) The machine has a toner cartridge of each color yellow, magenta, cyan and black as
shown in Fig.3-4.
2) The toner image developed using the primary colors is transferred to the transfer
drum for the printed color combination as shown in Fig.3-5 (a).
3) The toner image formed on the transfer drum is transferred to the transported paper
as shown in Fig.3-5 (b).
4) The toner on the paper is fused by the thermal fusing unit to fix the toner image onto
the paper as shown in Fig.3-5 (c).
Summarizing the above processes, a toner color layer is formed on the transported
paper, and subsequently, the color image is made through the subtractive process.
Transfer Belt
a. First Transfer
b. Second Transfer
c. Fusing
OPC Belt
Toner Cartridge
K
Y
M
C
Fig. 3-4
Y Y Y
M M M C C C C C
Transfer Belt
M M M
Y Y Y C C Y Y Y
Paper
Red Cyan
R
C
Fig. 3-5
3 - 5
Y Y Y
Toner
C C C
Green
G
Paper
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