Canon GP605 Service Manual page 836

CHAPTER 13 TROUBLESHOOTING
4. Halftone (PG-TYPE 4)
This print consists of halftone created without passing the paper through the density correc-
tion block (image processing). The result depends entirely on the performance of the image
formation system.
5. 17-Gradation (PG-TYPE 5)
6. Blank (PG-TYPE 6)
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COPYRIGHT © 1999 CANON INC.
Gradation
• faulty laser system
Uneven Density
• Faulty primary charging assembly
• Faulty developing system
Fogging
• faulty photosensitive drum
• faulty developing assembly
• faulty laser system
CANON GP605/605V REV.0 JAN. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)