Canon imageRUNNER 330 Service Manual page 133

2. Turning On and Off the Separation Static Eliminator
The separation static eliminator bias is turned on and off as follows:
The separation bias enable signal from the image processor PCB goes '0'.
The bias ON signal is generated by the PW-CPU on the composite power supply PCB.
The output from the high-voltage main transformer is applied to the separation static
eliminator.
3. Constant Voltage Control
The bias output is returned to the output control circuit to maintain a specific voltage.
4. Controlling the Output According to Paper Type
Paper with poor separation characteristics (e.g., thin paper) tends to cause separation faults. To
ensure proper separation, the application voltage is increased from the normal -2.3 kV to -3.0 kV.
The selection of an application voltage is made by the separation bias mode signal (serial
communication) from the image processor PCB.
Related Service Mode
OPTION>BODY>THIN-SP
COPYRIGHT © 1999 CANON INC. CANON imageRUNNER 400/330 REV.0 JAN. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 6 IMAGE FORMATION SYSTEM
The voltage applied to the separation static eliminator is increased
when thin paper mode is selected.
0: Does not change the application voltage. (default)
1: Changes the application voltage to -3.0 kV when thin paper
mode is selected.
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