Canon iR4570 Series Service Manual page 689

Code Cause
E191 There is an error in the communication with the high-voltage power
supply.
0000 The data transmission/reception
does not end normally 500 msec
after the most recent
transmission/reception of data
ended normally.
E202 There is an error in the detection of the CIS home position.
0001 The attempt to detect the home
position fails when the CIS is
moved forward.
0002 The attempt to detect the home
position fails when the CIS is
moved back.
E225 The light intensity of the CIS is faulty.
0001 During shading operation, the
intensity is below a specific
level.
0002 During DF stream reading, the
sheet-to-sheet light intensity is
faulty.
E227 The reader unit power supply is faulty.
0001 At time of power-on, the 24-V
port is off.
0002 At the start of a job, the 24-V
port is off.
0003 At the end of a job, the 24-V port
is off.
Remedy
Replace the high-voltage power
supply. Replace the DC controller
PCB.
Disconnect and then connect the
harness connector. Replace the
following as necessary: scanner
home position sensor, scanner
motor, reader controller PCB.
Disconnect and then connect the
harness connector. Replace the
following as necessary: scanner
home position sensor, scanner
motor, reader controller PCB.
Disconnect and then connect the
flexible cable. Replace the
following as necessary: flexible
cable, CIS, reader controller PCB.
Disconnect and then connect the
flexible cable. Replace the
following as necessary: flexible
cable, CIS, reader controller PCB.
Disconnect and then connect the
power supply harness connector.
Replace the power supply.
Disconnect and then connect the
power supply harness connector.
Replace the power supply.
Disconnect and then connect the
power supply harness connector.
Replace the power supply.