Konica Minolta bizhub C658 Service Manual page 1835

bizhub C658/C558/C458/C368/C308/C258
• To prevent the substance contained in the 2nd transfer roller from sticking to the transfer belt, Y toner is applied to the surface of a new 2nd
transfer roller at the time of replacement. (The Y toner image that corresponds to two complete revolutions of the transfer roller is formed
on the surface of the transfer belt and is then transfer red onto the surface of the 2nd transfer roller.)
• The Y toner that is less noticeable is used for the toner to be applied, in consideration of back marking.
(1) Execution timing
• The control is executed when the life counter of the 2nd transfer roller in the service mode is reset to zero.
8.3.3 2nd transfer roller cleaning
• In order to remove the remaining toner on the 2nd transfer roller, -/+ (DC) charge is applied alternately to transfer the remaining toner on
the 2nd transfer roller to the transfer belt. (The number of times that electrical charge is applied to the 2nd transfer roller is different
depending on each situation.)
• The cleaning blade then scrapes off the toner on the surface of the transfer belt.
- -
-
-
-
[3]
[1] Transfer belt
[3] Cleaning blade
8.3.4 Charge neutralization and separation of paper
• To neutralize any residual potential on the paper which has undergone the 2nd transfer process, there is a charge neutralizing needle
mounted on the guide plate after the 2nd transfer roller. There is a resin guide that prevents the electrode from directly contacting the
paper.
• The residual potential neutralized by the charge neutralizing needle is grounded via a conductive plate.
• In order to separate the paper from the transfer belt without fail after the 2nd transfer, a separation claw is mounted (center one point.)
[1]
[1] Transfer belt
[3] Separation claw
[5] 2nd transfer roller
O THEORY OF OPERATION bizhub C658/C558/C458/C368/C308/C258 > 8. 2ND
[1]
- -
-
+
[2]
[3]
[4]
[5]
O-60
[2]
-
-
HV1
[2] 2nd transfer roller
- -
[2] Paper winding prevention guide
[4] Charge neutralizing needle
- -
TRANSFER SECTION