Xerox Phaser 6120 Service Manual page 254

Neutralization and Separation of Paper (De-Tack)
To neutralize the paper that has undergone the 2nd transfer process, a Charge Neutralizing
Cloth is provided for the guide plate after the 2nd Transfer Roller.
.
Belt Positioning Sensor
When development takes place in this machine, the image of each color of toner is formed
on the surface of the Transfer Belt. The leading edge of the image of each color of toner
must therefore be aligned correctly with each other on the surface of the Transfer Belt.
The position of the Transfer Belt is detected when the Belt Positioning Sensor (PC4)
detects detection holes provided in the Transfer Belt.
There are two detection holes provided in the Transfer Belt. The image write start position
is varied according to the paper size. For a paper size of A4 or smaller, the image write
start position is aligned with detection hole A. For a paper size greater than A4, detection
hole B serves as the reference for the image write start position.
Detection
Hole B
Belt Positioning Sensor
Phaser® 6120 Color Laser Printer Service Manual
Charge Neutralizing Cloth
Transfer Belt
Direction of Rotation of Transfer Belt
7-34
Print Engine Theory of Operation
Charge Neutralizing Cloth
2nd Transfer Roller
4139to2084e0
Detection
Hole A
4139to2104e0