Canon GP335 Service Manual page 444

CHAPTER 14 TROUBLESHOOTING
2) Select <PD-ME> under <PD-DENSE>; then, press the OK key.
• The scanner makes 13 scans.
3) After reading operation, PD auto density correction ends when OK is indicated to the right of
<PD-ME>. If NG, check the following:
• Is the original placed correctly?
• Is the original the PD-DENS output? (The patches are black.)
After checking the above, execute PD-DENS once again. If still NG, go to the next page.
d. Executing DZ-DENS
1) Select COPIER>FUNCTION>DENS>DZ-DENS; then, press the OK key.
• A 15-gradation pattern will be generated. (The patches are white.)
e. Executing DZ-ME
1) Remove the PD-DENS output (black patches), and place the DZ-DENS output (white patches)
on the copyboard glass.
2) Select <DZ-ME> under DZ-DENS, and press the OK key.
• The scanner makes 13 scans.
3) After read operation, PD auto density correction ends when OK is indicated to the right of
<DZ-ME>. If NG, check the following:
• Is the read original placed correctly?
• Is the read original the DZ-DESN output? (The patches are white.)
After checking the above, execute DZ-DENS once again. If still NG, go to the next page.
14-26
DZ-DENS output
Figure 14-232
COPYRIGHT © 1999 CANON INC. CANON 405/335 REV.0 JAN. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
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