E121; E202; E204 - Canon ImageRunner 600 Service Manual

CHAPTER 13 TROUBLESHOOTING
31

E121

Cause Step
Foreign matter
Connector
Laser driver
cooling fan
(FM5)
DC controller
PCB
32

E202

Cause Step
Scanner home
position sensor
(PS1)
DC controller
PCB
33

E204

Cause Step
Scanner image
leading edge
sensor (PS3)
sensor
DC controller
PCB
13-94
COPYRIGHT © 1999 CANON INC.
1 Is there foreign matter that hinders the
rotation of the laser driver cooling fan?
2 Is the connector (J503) on the DC
controller PCB connected securely?
3 Replace the laser driver cooling fan
(FM5). Is the problem corrected?
1 Is the scanner at the scanner home
position when E202 turns on?
2 Is the scanner home position sensor (PS1)
normal? (See the instructions on how to
check photointerrupters.)
3
1 Does the scanner motor forward when the
Copy Start key is pressed?
2 Is the scanner image leading edge sensor
(PS3) normal? (See the instructions on
how to check photointerrupters.)
Checks
Checks
Checks
CANON imageRUNNER 600 REV.1 JAN. 2000 PRINTED IN U.S.A.
Yes/No Action
YES Remove the foreign
matter.
NO Connect the connector
securely.
NO End.
YES Replace the DC
controller PCB.
Yes/No Action
NO See "The scanner fails
to move forward."
YES Check the wiring from
the DC controller PCB
to the sensor; if
normal, replace the
sensor.
NO Replace the DC
controller PCB.
Yes/No Action
NO See "The scanner fails
to move forward."
YES Check the wiring from
the DC controller PCB
to the sensor; if
normal, replace the
sensor.
NO Replace the DC
controller PCB.