Canon imagePRESS 1135 Series Service Manual page 87

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Technology > Image Formation System > Various Types of Control > Primary Charging
■ Primary Charging
● Primary Charging Bias Control
Charge the photosensitive drum surface to an even positive potential.
Apply the primary charging bias (DC positive) generated at the primary charging high-voltage
PCB (PCB27) to the primary charging wire and grid plate.
• Primary chaging DC bias :
Apply a charge to the primary charging wire (Constant current).
• Primary grid bias :
Apply a charge to the grid plate. The bias value is determined based on the result of
potential control.
Primary charging high-voltage PCB (PCB27)
Grid wire
● Primary Charging Wire Cleaning Control
Prevent a charging failure caused by dirt on the primary charging wire.
Timing of Execution
1) When the fixing temperature is lower than 50 degree C at the time of power-on (multple
initial rotation).
2) Every time when 1500 continuou prints are counted. When a job is interrupted.
3) After a job is completed for every 2000 prints.
4) When "wire cleaning" is executed by the user mode.
2 Technology > Image Formation System > Various Types of Control > Primary Charging
Primary charging wire
F-2-48
Description
The wire cleaner moves back and forth and clean the primary charging wire, which is driven
by the primary charging wire cleaning motor (M4).
The position of the wire cleaner is detected by PS160 and PS161.
• Front: Primary charging wire cleaner position sensor 1 (PS160)
• Back: Primary charging wire cleaner position sensor 2 (PS161)
PS161
Wire
Process unit
driver PCB
(PCB52)
Primary charging unit
Wire cleaner
Related Error Code
• Wire movement error.
E060-0000: Wire cleaning member doesn't return to the front side 10 sec after it is
signaled to return.
E060-0001: Wire cleaning member remains in the front side 10 sec after it is signaled
to move to the backside.
Related Service Mode
• Execute the wire cleaning.
COPIER > FUNCTION > CLEANING >WIRE-CLN (5 back-and-force operation)
COPIER > FUNCTION > CLEANING >WIRE-EX (1 back-and-force operation)
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Primary charging wire
cleaning motor
(M4)
PS160
F-2-49
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