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CHAPTER 6 IMAGE FORMATION SYSTEM
6-26
COPYRIGHT
©
1999 CANON INC. CANON imageRUNNER 600 REV.1 JAN. 2000 PRINTED IN U.S.A.
Figure 6-308 Transfer Guide Bias Output Table
2. Controlling the Output to Suit the Environment
The transfer guide bias is controlled to an optimum level to suit the environment (conditions
identified based on data from the environment sensor).
Transfer guide bias
Paper passing
+600
+200
Paper being fed
+600
+600
Normal/low humidity
High humidity
A bias of the same polarity as the toner is
applied in sync with the rotation of the
photosensitive drum.
The photosensitive drum is rotating;
yet, paper is not being fed.
Normally, +600 V is applied to prevent
adhesion of toner to the transfer guide.
In a high humidity environment, paper tends to absorb moisture
(lower resistance), charging the paper in excess to affect transfer
(faulty transfer); as such, the output is decreased.
COPIER>OPTION>BODY>
TRNSG-SW
(transfer guide bias control mode
switching)
0: switches to +200 V in high humidity. (default)
1: fixes the transfer guide bias to +600 V.
2: fixes the transfer guide bias to +200 V.
3: switches to +200 V in normal humidity.
4: switches to +200 V in low humidity.
If transfer faults occur, select '2' through '4'.
Related Service Mode