Canon iR1600 Service Manual page 445

E577
The return roller does not reach home position when the delivery motor
(M1) is driven for a specific time. (If the same condition is detected while
alignment takes place in the direction of feed, a jam will be identified.)
Possible cause The delivery motor (M1) on the finisher controller PCB is faulty. The return
roller home position sensor (S3) is faulty. The connector is discontented or
has an open circuit. The delivery motor relay harness is faulty. The return
roller is faulty. The finisher controller PCB is faulty.
Remedy
1) Delivery motor (drive mechanism)
NO : Correcting the drive mechanism.
NO : Correct the return roller spring.
NO : Loosen the screw, and correct the tension.
2) Return roller home position sensor (S3)
NO : Replace the sensor.
3) Delivery motor (M1), Finisher controller PCB
YES : End.
NO : Replace the finisher controller PCB.
E580
The stack tray upper limit sensor (S1) goes ON while the stack tray up/
down motor (M5) is in operation.
The clock signal of the stack tray up/down clock sensor (S9) is not detected
15 times or more within 0.8 sec while the stack tray up/down motor (M5) is
in operation.
It does not reach the stack tray paper height sensor (S10) 2 sec after the
stack tray up/down motor (M5) rotates for ascent.
It does not leave the stack tray power height sensor (S10) 2 sec after the
stack tray up/down motor (M5) starts to rotate for descent.
Possible cause The stack tray up/down motor (M5) is faulty. The stack tray paper height
sensor (S10) is faulty. The sensor connector is disconnected or has an open
circuit. The stack tray up/down clock sensor (SW9) is faulty. The sensor
connector is disconnected or has an open circuit. The stack tray up/down
motor is subjected to an abnormal load. The finisher controller PCB is
faulty.
COPYRIGHT© 2002 CANON INC.
Is the return roller rotation when the motor is rotating CCW?
Is the return roller displaced?
Is the tension of the delivery motor drive belt appropriate?
Check the return roller home position sensor (S3). Is the sensor
normal?
Try replacing the delivery motor (M1). Is the fault corrected?
2000 CANON iR1600/iR2000 REV.1 JAN. 2002
CHAPTER 13 TROUBLESHOOTING
13-127