Canon iR4570 Series Service Manual page 764

Code Cause
0000 When the waste toner case is identified as
being full for 2000 prints continuously,
an alert is issued; thereafter, the case is
identified as being full continuously for
100 prints.
E020 The path between the sub hopper and the developing assembly is clogged with toner.
0000 The developing assembly toner sensor
detects the absence of toner, while the
sub hopper toner sensor detects the
presence of toner. With the developing
clutch turned on, the hopper feedscrew
motor is rotated for 1 sec intermittently
194 times; still, the developing assembly
toner sensor does not detect the presence
of toner.
E024 The developing assembly connector is disconnected.
0000 The connection detection signal is absent
continuously for 100 msec.
E025 The hopper motor or the bottle motor is faulty.
0000 The sub hopper toner sensor connection
detection signal is absent for 100 msec 10
times in sequence.
0001 While the hopper motor is rotating, the
motor error lock signal is detected
continuously 4 times every 56 msec. Or,
while the bottle motor is rotating, the
motor error lock signal is detected 22
times in sequence every 10 msec.
E032 The NE controller counter malfunctions.
0001 An open circuit is detected for the count
pulse signal.
E064 The voltage of the power supply is faulty (high-voltage error).
0001 The value read from the EEPORM is
outside a specific range.
Remedy
Replace the waste toner sensor. Replace the
DC controller PCB.
Replace the developing assembly toner
sensor. Replace the sub hopper toner sensor.
Replace the DC control PCB.
Replace the developing assembly toner
sensor. Connect the connector. Replace the
DC controller PCB.
Replace the sub hopper toner sensor.
Connect the connector. Replace the
detection PCB.
Replace the hopper motor. Replace the
bottle motor. Replace the DC controller
PCB.
Turn off the main power, and check the
cable for an open circuit; then, turn the main
power back on.
Turn off and then back on the main power.
Replace the EEPROM.