Canon IR2200, IR3300, IR2800 manual Controlling the Transfer Charging Roller Bias, F04-301-01

CHAPTER 4 IMAGE FORMATION SYSTEM

3 Controlling the Transfer Charging Roller Bias

3.1 Outline

Part 2>Chapter 5>7.8.3 “Controlling the Transfer Roller Charging”

The machine’s transfer charging is a direct charging method that uses a transfer charging roller. A DC bias is applied to the transfer charging roller.

The following relate to the transfer charging system:

[1]Turning on/off the bias.

[2]Controlling the DC bias to a specific voltage/current level.

[3]Controlling the detection of transfer charging roller resistance (ATVC control)

[4]Controlling the output by operation mode

[5]Controlling the output by the environment sensor (humidity)

Composite power supply PCB

	24 VDC input from				+24V
	main power supply J135
		Transfer
		charging				Transformer drive					Photosensitive
	J301 output enable J136					signal
											drum
	-B9	signal	-B4				Transfer cleaning			Cleaning
											T133
		Transfer output				Cleaning bias output	bias high-voltage			bias out
						ON signal		transformer
	-B8	mode signal 4	-B5					(T506)
											Transfer
		Serial				Voltage level					charging roller
						(ATVC measurement result)
		communication
PCB	Print/standby mode signal				CPU	Voltage
						detection
		Transfer bias output data
										Transfer
controller		ATVC measurement data			PW-	Transformer drive
								Transfer bias		bias
						signal		high-voltage		output
	J301		J136					transformer
						Transfer bias output		(T133)
	-A3		-A10
DC
	-A1Transfer output-A12					ON signal
	-B5	mode signal 1	-B8			Transfer bias
		Transfer output				output control		Current
						signal
	-B6	mode signal 2	-B7					level	Current
						Drive
						control			detection		Environment
											sensor
											(humidity)
		Transfer output		Transfer bias output
	-B7	mode signal 3	-B6	current switching signal
	J302-B14					Measurement result
						F04-301-01
COPYRIGHT © 2001 CANON INC.						CANON iR2200/iR2800/iR3300 REV.0 MAR. 2001					4-9 P