Canon imageRUNNER ADVANCE 6075 Series Service Manual page 113

2
Technology > Image Formation System > Controls > Transfer
● Pre-transfer Charging Wire Cleaning Control
To prevent charging failure caused by soil of the Pre-transfer Charging Wire.
<Execution timing>
To be executed together with the primary charging wire cleaning control at the same time.
<Control description>
The drive of the Pre-Transfer Charging Wire Cleaning Motor (M7) makes the Cleaner Screw
rotate clockwise/counterclockwise, which moves the Cleaning Pad back and forth to clean the
Pre-transfer Charging Wire.
The Pre-transfer Charging Shutter Position Sensor ( ) detects position of the Cleaning Pad.
Screw
Pre-transfer Charging Wire
<Related service modes>
• To clean the Charging Wire (5-roundtrip)
COPIER > FUNCTION > CLEANING > WIRE-CLN
• To check operation of the charging wire cleaning (1-roundtrip)
COPIER > FUNCTION > CLEANING > WIRE-EX
• To specify cleaning interval of the last rotation charging wire (Default: every 2000 sheets (the
interval can be changed within the range between 1000 and 5000 sheets))
COPIER > OPTION > CLEANING > W-CLN-P
2 Technology > Image Formation System > Controls > Transfer
Pre-transfer Charging Wire Cleaning Pad
Pre-transfer Charging
Wire Cleaning Motor(M7)
● Pre-transfer Charging Shutter Control
To prevent uneven potential on the Photosensitive Drum caused by discharge products
(nitrogen oxide) accumulated on the Pre-transfer Charging Assembly.
<Execution timing>
To be executed together with the Pre-transfer charging wire cleaning control at the same
time.
<Control description>
The shutter is opened or closed by the cleaning mechanism of the Pre-transfer Charging
Wire.
The Pre-transfer Charging Shutter is made of fiber and usually taken up by the bobbin.
The drive of the Pre-transfer Charging Wire Cleaning Motor (M7) moves the Cleaning Pad
to the rear and the shutter taken up by the bobbin becomes extended to make the Shutter
closed.
Because the Shutter comes between the Pre-transfer Charging Wire and the Photosensitive
Drum, discharge products from the Primary Charging Assembly do not reach the
Photosensitive Drum.
The Pre-transfer Charging Shutter Position Sensor (PS95) detects opening/close of the
shutter.
Pre-transfer Charging Wire
F-2-82
Photosensitive
Drum
Charging Shutter
Screw
Pre-transfer Charging Wire
Cleaning Motor(M7)
Charging Shutter
Pre-transfer
Pre-transfer Charging Shutter Sensor(PS95)
Charging Wire
2-59
Shutter Flag
F-2-83
2-59