Canon C2050 Service Handbook page 270

ERROR CODE
E041
Main cause The deck lifter motor (M102) is faulty. The deck driver PCB is faulty. A
connected device is faulty. The deck lifter position sensor (PS104) is faulty.
The deck paper sensor (PS107) is faulty.
Condition of
detection
0001 The fault was detected while the lifter was moving up.
0002 The fault was detected while the lifter was moving down.
The deck lifter position sensor (PS104) does not detect the lifter within 60
sec after the deck lifter UP signal is generated.
The output of the deck paper sensor (PS107) is '0' when the output of the
deck lifter position sensor (PS104) and that of the deck paper level sensor
(PS108) are '1'.
E043
Main cause The deck main motor (M101) is faulty. The deck driver PCB is faulty. A
connected device is faulty.
Condition of
detection
The PLL lock signal (DMPLK) remains '1' for 2 sec or more after the deck
main motor drive signal is generated.
E051
Main cause The side registration sensor (S32) is faulty. The side registration motor
(M17) is faulty. The duplex driver PCB is faulty. The DC controller PCB is
faulty.
Condition of
detection
0001 The home position of the side registration sensor (S32) cannot be
E-6
detected.
The home position cannot be detected when 24-V power is turned
on in response to the turning on of the main power switch or the
opening and closing of the front cover/delivery assembly cover/
face-down delivery unit.