Canon CLC 1120 Service Handbook page 238

CHAPTER 5 SELF DIAGNOSIS
Code
E021
E030
E040
5-10
Cause
• The developing locking motor
(PM1, PM2, PM3, PM4) is faulty.
• The developing assembly HP
sensor (PS49, PS51, PS53, PS55)
is faulty.
• The developing locking driver
PCB is faulty.
• The DC driver PCB is faulty.
• The CPU PCB is faulty.
• The jumper connector of J1050 on
the DC driver PCB is
disconnected.
• The DC driver PCB is faulty.
• The lifter motor drive system is
subjected to an overload.
• The lifter motor (M11, M12/
DM12, M13/DM13, M15) is
faulty.
• The CPU PCB is faulty.
Timing of detection
0100 When the power switch is on,
the M developing assembly
HP sensor is '0'.
0200 When the power switch is on,
the C developing assembly
HP sensor is '0'.
0300 When the power switch is on,
the Y developing assembly
HP sensor is '0'.
0400 When the power switch is on,
the Bk developing assembly
HP sensor is '0'.
0101 When the developing
assembly is locked, the M
developing assembly HP
sensor is '1'.
0201 When the developing
assembly is locked, the C
developing assembly HP
sensor is '1'.
0301 When the developing
assembly is locked, the Y
developing assembly HP
sensor is '1'.
0401 When the developing
assembly is locked, the Bk
developing assembly HP
sensor is '1'.
A short circuit is detected in the
counter switching signal.
0001 When the cassette 1 lifter
motor is on, an overcurrent is
detected in the motor.
0002 When the cassette 2 (for
CLC1150, cassette 1) lifter
motor is on, an overcurrent is
detected in the motor.
0003 When the cassette 3 (for
CLC1150, cassette 2) lifter
motor is on, an overcurrent is
detected in the motor.
0004 When the multifeeder lifter
motor is on (lifter is moving
up), an overcurrent is detected
in the motor.
0005 When the multifeeder lifter
motor is on (lifter is moving
down), an overcurrent is
detected in the motor.