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Main Unit Theory of Operation 1st Transfer Section
2-45
II Composition/Operation
8.3.5 Transfer Belt cleaning
• To scrape residual toner off the surface of the Transfer Belt, the Transfer Belt is provided
with a Cleaning Blade.
• The Cleaning Blade is in pressed contact with the Transfer Belt at all times. That is, it
cleans the surface of the Transfer Belt as long as the belt turns.
• The Toner Collecting Screw conveys toner scraped off by the Cleaning Blade into the
Waste Toner Box.
☞ 2-57
A. 1st Transfer Belt cleaning control
• If there is a possibility of the machine being stopped with toner left on the surface of the
Transfer Belt between the Cleaning Blade position and the 2nd transfer position (due to a
media misfeed or malfunction), the Intermediate Transport Motor (M3) is energized to
turn the Transfer Belt. The residual toner is thereby removed from the Transfer Belt.
• No forced cleaning sequence is carried out to clean the entire surface of the Transfer
Belt.
B. 1st Transfer Belt cleaning operation timing
• The 1st transfer cleaning sequence is carried out before the 2nd transfer cleaning as part
of the initial operation sequence.
• The 1st transfer cleaning sequence is carried out before the ATVC 2nd transfer cleaning
sequence.
C. 1st Transfer Belt backward rotation control
• To prevent paper dust, toner, and other foreign matter from being wedged in the Cleaning
Blade while the Transfer Belt remains stationary, the Transfer Belt is turned backward so
that the foreign matter can be removed.
• Once the Transfer Belt is started turning backward, this operation takes precedence over
any other request for energizing the Intermediate Transport Motor (M3). Such a request
is honored after the backward rotation control is completed.
• The backward rotation control is not executed at high temperatures.
4138to2035c1
Cleaning Blade
Toner Collecting
Screw
Transfer Belt
4138to2049c1
1st Transfer Belt cleaning area
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