Transfer Belt Cleaning - Develop QC 2235 Plus Service Manual

Transfer Corona section
10.3.6

Transfer Belt cleaning

• To scrape residual toner off the surface of the Transfer Belt, the Transfer Belt is provided
with a Cleaning Brush and a Charging Brush.
• The Cleaning Brush is a rotary brush. To enhance its ability to scrape residual toner off
the surface of the Transfer Belt, the brush is turned in a direction opposite to that of the
Transfer Belt. The Cleaning Brush Motor provides the drive for this system.
• The Charging Brush is located on the upstream side of the Cleaning Brush. A bias (+DC)
is applied to the Toner Collecting Roller to let current flow through the Cleaning Brush,
Transfer Belt, and Charging Brush. Through potential difference involved, toner left on
the surface of the Transfer Belt is conveyed to the Toner Collecting Roller.
Cleaning Brush
Toner Collecting
Roller
+
HV1
Toner Collecting Screw
A. Operation timing
• Since there is a possibility of the machine being stopped with toner left on the Transfer
Belt, the machine operates the Transfer Belt cleaning sequence when the Power Switch
is turned ON, or when the Right Door, Left Door, or Front Door is opened and closed.
Main Motor (M1)
Cleaning Brush Motor (M22)
Transfer Belt Cleaning Bias
QC 2235plus Theory of Operation Ver.1.0 Feb. 2004
Charging Brush
Transfer Belt
Driven Roller
4036ma2024c2
Cleaning Start Signal
2-42
Cleaning Brush
4036ma2609c0
4036ma2174c0