Canon CLC 1120 Service Handbook page 245

Code
• The side A sensor (PS2) is faulty.
E071
• The side B sensor (PS3) is faulty.
• The C sensor (PS4) is faulty.
• The signal plate is faulty.
• The drum motor drive system is
subjected to an overload.
• The transfer drum is not locked
properly.
• The DC driver PCB is faulty.
• The CPU PCB is faulty.
• The transfer drum cleaner brush
E072
motor (M8) is faulty.
• The polishing roller motor (M9) is
faulty.
• The motor drive system is
subjected to an overload.
• The attraction/transfer locking cam
motor (PM7) is faulty.
• The attraction/transfer locking cam
HP sensor (PS8) is faulty.
• The registration path driver PCB is
faulty.
• The DC driver PCB is faulty.
• The CPU PCB is faulty.
Cause
CHAPTER 5 SELF DIAGNOSIS
Timing of detection
1207 The rising edge signal of the
signal plate D to be detected
by the C sensor is generated
10 ms later after the rising
edge signal of the signal plate
detected by the side A sensor
has been detected.
1208 The rising edge signal of the
signal plate to be detected by
the C sensor is generated 10
ms later after the falling edge
signal of the signal plate
detected by the side A sensor
has been generated.
0002 The motor lock signal
(TRCMLK) is '0' for 1 sec or
more while the transfer drum
cleaner brush motor is
rotating.
0003 An overcurrent is detected for
1 sec or more while the
polishing roller motor is
rotating.
0202 The attraction/transfer looking
cam HP sensor does not go '1'
within 4 sec after the
attraction/transfer locking
cam motor has started to
rotate.
5-17