2Nd Image Transfer Roller Cleaning - Develop QC 2235 Plus Service Manual

QC 2235plus Theory of Operation Ver.1.0 Mar. 2004
10.3.7

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.
-
-
Cleaning Brush
• Operation timing
• The cleaning sequence is carried out after a sequence, in which the Image Transfer Roll-
ers are retracted from the Transfer Belt, which takes place when the Power Switch is
turned ON, or the Right Door, Left Door, or Front Door is opened and closed.
• 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.
After the end of Transfer Belt Cleaning
1st Image Transfer Pressure/
Retraction Motor (M11)
2nd Image Transfer Reverse
Bias
2nd Image Transfer Pressure/
Retraction Motor (M13)
- -
-
- -
Transfer Belt
2-43
Transfer Corona section
-
+
HV1
2nd Image
4036ma2175c0
Transfer Roller
Retracted
Retra
cted
4036ma2178c0