Secondary Transfer Roller Cleaning - Epson AcuLaser C1900 Service Manual

EPSON AcuLaser C1900/AcuLaser C900
SECONDARY TRANSFER ROLLER PRESSED / SEPARATED
The secondary transfer roller is pressed and separated by turning on and off of the
secondary transfer roller pressure solenoid (SL5) which activates rotation of the cam on the
printer body.
When the secondary transfer roller pressure solenoid (SL5) is turned on, the cam on the
printer body rotates and the secondary transfer roller is separated.
The position of the pressed/separated roller is detected by the transfer roller position
detection sensor (PC7).
Drive Roller
Secondary
Transfer Roller
Pressure Lever
Separated
SECONDARY TRANSFER ROLLER PRESSING/SEPARATION TIMING
Pressing Before the paper enters under the secondary transfer roller
Separation After the tail end of the paper has passed the secondary transfer roller
Operating Principles
Secondary Transfer Roller Pressure Solenoid (SL5)
Secondary Transfer Roller
Spring
Transfer Roller
Position Detection
Sensor
Cam
Pressed
Description of Mechanisms

2.4.5.2 Secondary Transfer Roller Cleaning

Inverse bias is output to the secondary transfer roller to remove the residual toner on the
secondary transfer roller.
The removed residual toner is placed on the transfer belt and then collected with the
cleaning blade.
OPERATION TIMING
A predetermined time after preliminary rotation
After the paper has passed the secondary transfer roller, if a size error
occurred
Before secondary transfer ATVC
Revision B
106