Canon ImageRunner iR8500 Series Service Manual page 815

Code Cause
0000 The constant speed rotation signal (LM-RDY)
does not arrive for 20 sec or more after the
laser scanner motor (M4) drive signal has been
generated.
E111 The rotation of the laser motor cooling fan is faulty.
0000 The lock signal arrives for 5 sec or more
although the laser motor cooling fan (FM1) is
being driven.
E121 The rotation of the laser cooling fan (1/2) is faulty.
0001 The lock signal arrives for 5 sec or more
although the laser cooling fan 1 (FM3) is being
driven.
0002 The lock signal arrives for 5 sec or more
although the laser cooling fan 2 (FM5) is being
driven.
E202 There is an error in the detection of the scanner home position.
0000 Scanner home position cannot be detected
within a specific period of time after the power
switch is turned on or the Start key is pressed.
E204 There is an error in the detection of the image leading edge signal.
0000 During forward movement in fixed reading
mode or during a home position search, the
image leading signal does not occur; or, in
stream reading mode, the image leading edge
signal does not arrive from the ADF controller
PCB.
E220 Inverter is faulty.
0001 An error is detected in the lamp inverter PCB. - Check the connection of the lamp inverter PCB, and
E225 Scanning lamp is not turned on properly.
0000 A specific signal level cannot be attained by
CCD gain correction at power-on.
0002 The end gain correction value has changed
more than the specified level, compared
with the correction value level of the previous
sheet
E240 The communication between the MCON and DCON is faulty.
0000 A communication fault exists between the
CPUs of the main controller PCB and the DC
controller PCB.
E243 The communication between the control panel PCB and MCON is faulty.
Remedy
- Check if the connector (J762) of the laser scanner
motor driver PCB is mounted properly.
- Check if the connector (J503) of the DC controller
PCB is mounted properly.
- Replace the laser scanner unit.
- Replace the DC controller PCB.
- Check if there is no foreign material in the rotation
assembly of the laser motor cooling fan.
- Check if the connector (J503) of the relay PCB is
mounted properly.
- Replace the laser motor cooling fan.
- Replace the DC controller PCB.
- Check if there is no foreign material in the rotation
assembly of the laser cooling fan 1.
- Check if the connector (J503) of the relay PCB is
mounted properly.
- Replace the laser cooling fan 1.
- Replace the DC controller PCB.
- Check if there is no foreign material in the rotation
assembly of the laser cooling fan 2.
- Check if the connector (J503) of the relay PCB is
mounted properly.
- Replace the laser cooling fan 2.
- Replace the DC controller PCB.
Caution
No code will be indicated. The keys will be locked. You
can check the code in service mode
(COPIER>DISPLAY>ERR).
- Check if the scanner motor is connected properly, and
replace the scanner motor if necessary.
- Check if the connector (J1720) of the relay PCB is
mounted properly.
- Replace the scanner home position sensor.
- Replace the reader controller PCB.
Caution
No code will be indicated. The keys will be locked. You
can check the code in service mode
(COPIER>DISPLAY>ERR).
- Check if the scanner motor is connected properly, and
replace the scanner motor if necessary.
- Replace the scanner image leading edge sensor.
- Replace the reader controller PCB.
replace if necessary.
- Check the connection of the reader controller PCB, and
replace if necessary.
- Check the connection of scanning lamp, and replace if
necessary.
- Check the connection of inverter PCB, and replace if
necessary.
- Check the connection of CCD/AP PCB, and replace if
necessary.
- Check the connection of reader controller PCB, and
replace if necessary.
- Check the connection of scanning lamp, and replace if
necessary.
- Check the connection of inverter PCB, and replace if
necessary.
- Check the connection of CCD/AP PCB, and replace if
necessary.
- Check the connection of reader controller PCB, and
replace if necessary.
- Check the wiring between the DC controller PCB and
the main controller PCB.
- Replace the DC controller PCB.
- Replace the main controller PCB.
Chapter 16
16-19