2Nd Image Transfer Roller Cleaning - Konica Minolta bizhub c450 Service Manual

14. Transfer Corona section
14.3.8

2nd Image Transfer Roller cleaning

• To remove residual toner off the surface of the 2nd Image Transfer Roller, a +/- DC bias is
applied alternately to the roller, thereby moving the residual toner to the surface of the
Transfer Belt.
• The Cleaning Brush then scrapes off the toner on the surface of the Transfer Belt.
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Cleaning Brush
• Operation timing
• The sequence is carried when the Main Power Switch and the Auxiliary Power Button are
turned ON or the cover is opened and closed when a print cycle has been abnormally
terminated due to a misfeed or malfunction.
• The sequence is also carried out at the end of a print cycle that is run after the cumula-
tive number of printed pages produced has exceeded 100, or during a print cycle that is
run after the cumulative number of printed pages produced has exceeded 120, since the
previous cleaning operation.
• At this time, the cumulative number of printed pages counts up 1 for 216 mm or less of
printed paper FD length, and 2 for more than 216 mm of printed paper FD length.
1st Image Transfer Pressure/
Retraction Motor (M11)
2nd Image Transfer Reverse
Bias
2nd Image Transfer Pressure/
Retraction Motor (M13)
58
- -
-
-
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Transfer Belt
After the end of Transfer Belt Cleaning
Theory of Operation Ver. 1.0 Mar. 2005
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-
+
HV1
2nd Image
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Transfer Roller
Retracted
Retra
cted
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