Kyocera FS-6020 - Transfer;Separation Section

FS-6020
2-1-12
2-1-4 Transfer/separation section
Transfer/separation section consists of the transfer roller and separation charger brush. The transfer bias is loaded to the
transfer roller by the high voltage output from the engine/high voltage PWB and the toner on the drum is attracted to the
transfer roller side due to the electric potential difference and then transferred to the paper. The separation bias is loaded
to the separation charger brush output from the engine/high voltage PWB acting to separate the paper with toner
transferred from the drum.
1
2
Figure 2-1-17 Transfer/separation section
Engine/high voltage PWB
High
voltage
circuit
(T)OUT
(R)OUT
CPU
(U1)
THVDR
TSEL1
TSEL2
RHVDR
SHVDR
SHVSEL
Transfer roller
Separation
charger
brush
Drum
SHVDR
SHVSEL
L
L
L
H
5 µA 10 µA
Separation bias
output
(Logic)
Control signal
(R)OUT
THVDR
TSEL1
TSEL2
L
L
L
L
L
H
L
H
L
L
H
H
RHVDR H H H H
H
-
-
H
H
-
-
L
10 µA 15 µA 20 µA 25 µA0
Transfer
reverse
voltage
500 V
Transfer bias output
(Logic)
Control signal
(T)OUT
Transfer bias output
Separation bias output
Figure 2-1-18 Transfer/separation section block diagram
1Transfer roller
2Separation charger
brush