Xerox Phaser 6120

Print Engine Theory of Operation
Phaser® 6120 Color Laser Printer Service Manual
7-31
2nd Transfer Roller Pressure/Retraction Mechanism
■ During color printing, the toner image of each color of toner is transferred to the Transfer
Belt (a total of four times, once for each color). Pressure/retraction control with respect to
the Transfer Belt is provided for the 2nd Transfer Roller.
■ In the standby state, the 2nd Transfer Roller is in a position retracted from the Transfer
Belt.
Pressure/Retraction Operation
■ The pressure/retraction operation is performed by the Main Motor (M1), Pressure/
Retraction Solenoid /2nd Image Transfer (SL4), and Pressure/Retraction Clutch.
■ When the Pressure/Retraction Solenoid /2nd Image Transfer (SL4) is energized, drive
from the Main Motor (M1) is transmitted to the Pressure/Retraction Clutch.
Pressure Sequence
■ Drive from the Main Motor (M1) is transmitted to the drive gear.
■ Rotation of the drive gear is transmitted to the Pressure/Retraction Clutch.
■ When the Pressure/Retraction Solenoid /2nd Image Transfer (SL4) is energized, the
Pressure/Retraction Clutch rotates a half turn. This moves the Pressure Slider.
■ When the Pressure Slider is moved, ribs on the Pressure Slider push up the 2nd Transfer
Assembly.
4139to2079e0
Pressure/Retraction Clutch
Main Motor
2nd Transfer Roller
Pressure/Retraction Clutch
Transfer Belt
2nd Transfer Assy
Pressure/Retraction Solenoid
/
2nd Image Transfer