The Copy Is Solid Black; Troubleshooting - Canon iR1600 Service Manual

CHAPTER 13 TROUBLESHOOTING

3.3.22 The copy is solid black.

Machine state
1) Execute 'PRINT'. is the output image normal? (See 5.5.5 of Chap-
NO:
Contact sensor
2) Is the contact sensor ON during copying?
NO:
Connector
3) Is the connection of the connectors (J1, J3) on the analog processor
NO:
Contact sensor
4) Try replacing the contact sensor. Is the problem corrected?
YES: End.
Analog processor PCB, Image processor PCB
5) Try replacing the analog processor PCB. Is the problem corrected?
YES: End.
NO:
High-voltage leaf spring
6) Is the connection between the contact of the leaf spring for the pri-
NO:
Drum unit
7) Try replacing the drum unit. Is the problem corrected?
YES: End.
Developing assembly
8) Try replacing the developing assembly. Is the problem corrected?
YES: End.
High-voltage leaf spring
9) Is the connection between the contact for the primary charging bias
YES: Replace the DC controller PCB.
NO:
13-36
ter 13.)
Go to sep 6.
See "The contact sensor fails to go ON."
PCB, the connector (J221) on the image processor PCB, and the
connector (J30) on the contact sensor normal?
Correct the connection. If the flexible cable has a scratch, replace
it.
Replace the image processor PCB.
mary charging bias and the contact of the developing assembly nor-
mal?
Clean the contacts. If the problem is not corrected, or if the dam-
age/deformation is found, replace the faulty part.
on the DC controller PCB and the contact of the developing assem-
bly normal?
Clean the contacts. If the fault is not corrected, or deformation/
damage is found, replace the faulty part.
COPYRIGHT© 2002 CANON INC. 2000 CANON iR1600/iR2000 REV.1 JAN. 2002