Canon imageRUNNER ADVANCE C350 series Service Manual page 107

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Technical Explanation > Image Formation System > Controls > Transfer/Separation
● Primary Transfer Roller Disengagement Control
The Primary Transfer Roller is usually disengaged.
Timing of engagement
• When image formation is executed
Related service mode:
• Execution of the Primary Transfer Roller disengagement
COPIER > FUNCTION > MISC-P > T1-UP
• ON/OFF of init after ITB rplce:UI menu
COPIER > OPTION > DSPLY-SW > ITB-DSP:
To set whether to display "ITB" on Initialization screen after replacing parts in UI menu.
When allowing the user to replace the ITB, set 1.
Timing of disengagement
• At power-on
• At recovery from sleep mode
• When the Front Door or the Right Door is opened or closed (if not disengaged)
• When image formation is completed
Primary Transfer Roller
2 Technical Explanation > Image Formation System > Controls > Transfer/Separation
M02 ITB Motor
Primary Transfer
SL01 Disengagement
Solenoid
F-2-83
● ATVC Control
Primary Transfer ATVC
The transfer voltage required to prevent transfer failure due to environmental changes and to
obtain the target transfer current value is set.
Control timing
1) At power-on (when the fixing temperature is 80 deg C or higher)
2) At power-on (when the Right Door is opened/closed at times other than at jam
removal)
3) When the internal temperature has been changed from the time of previous ATVC
control by 3 deg C
4) At paper interval (equivalent to 80 images) during continuous printing
5) At last rotation after accumulated 50 images
Control description
1) Monitor current value of the primary transfer DC bias is detected.
2) Optimal target current value is determined based on temperature/humidity data of the
Environment Sensor.
3) The primary transfer DC bias is determined that is to be applied to the Primary
Transfer Roller.
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