Epson AcuLaser C2600 Service Manual page 99

EPSON AcuLaser C2600/2600
2.1.3.7 Secondary Transfer (Belt to Paper)
The secondary transfer is the final transferring process, which applies the complete
toner image on the belt to the paper.
PRINCIPLE OF SECONDARY TRANSFER
The complete toner image is retained on the Transfer Belt surface because of the
primary transfer bias applied to the belt. In the secondary transfer process, a bias
voltage higher than that of the primary transfer is supplied to the 2nd Transfer Roller.
The roller moves toward the Transfer Belt from backside of the paper to press it against
the belt. This causes the paper to carry a high positive charge and attract the toner
image from the Transfer Belt to it. With the toner image transferred on it, the paper
goes toward the fusing section by the belt rotation. When completing the secondary
transfer, the 2nd Transfer Roller moves away from the Transfer Belt.
Transfer Belt
Backup Roller
Figure 2-18. Secondary Transfer (Belt to Paper)
Operating Principle
Paper
2nd
Transfer
Roller
HVPS
02002001
Print Process
2ND TRANSFER ROLLER UNIT
2nd Transfer Roller
This is a conductive roller and carries a high positive bias supplied from HVPS. It
makes contact with the backside of the paper (the opposite side of the side to be
printed) to charge the paper positively.
2nd Transfer Roller Clutch
This clutch switches the drive force of the main drive motor to the 2nd transfer
roller cam.
2nd Transfer Roller Cam
The cam, which is driven by the main drive motor, moves the 2nd transfer roller
to/away from the transfer belt.
2nd Transfer Roller
2nd Transfer
Roller Cam
2nd Transfer
Roller Clutch
Figure 2-19. 2nd Transfer Roller Unit
Revision B
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