Canon CLC 1120 Service Handbook page 250

CHAPTER 5 SELF DIAGNOSIS
B. RDF
Note:
If the self diagnostic mechanism has turned on, you can reset the machine by turning the
copier's power switch off and then on.
If you want to continue to make copies while the RDF is out of order, place the original on the
copyboard glass after lifting the RDF.
Code
E400
E401
E402
E403
E404
E405
E407
E408
E411
5-22
Cause
• The communication of data with
the copier is faulty.
• The pickup motor (M1) is faulty.
• The pickup roller home position
sensor 1 (S8) is faulty.
• The belt motor (M3) is faulty.
• The belt motor clock sensor (S11)
is faulty.
• The reversal motor (M2) is faulty.
• The slip sensor (S10) is faulty.
• The delivery motor (M5) is faulty.
• The delivery motor clock sensor
(S12) is faulty.
• The pickup motor (M1) is faulty.
• The pickup motor clock sensor
(S12) is faulty.
• The tray drive motor (M6) is
faulty.
• The tray position sensor (S25) is
faulty.
• The feeder motor (M8) is faulty.
• The tray position sensor (S25) is
faulty.
• The registration sensor 1 (S3) is
faulty.
• The skew sensor 1 (S4) is faulty.
• The manual feed registration
sensor (S19) is faulty.
• The image leading edge sensor
(S20) is faulty.
• The original sensor 1 (S7) is
faulty.
Timing of detection
The communication is monitored at
all times, and it is interrupted for 5
sec or more.
The state of the sensor remains
unchanged after the pickup motor
has been driven for 2 sec or more.
The number of belt motor clock
pulses is lower than a specific value
for 100 msec.
The number of slip clock pulses is
lower than a specific value for 100
msec.
The number of delivery motor clock
pulses is lower than a specific value
for 200 msec.
The number of pickup motor clock
pulses is lower than a specific value
for 200 msec.
The state of the sensor remains
unchanged after the tray drive motor
has been driven for 2 sec or more.
The number of feed motor clock
pulses is lower than a specific value
for 100 msec.
The output of each sensor is a
specific value or more in the absence
of paper.