Gradation Reproduction Failure In Original Higher-Density Areas - Minolta CF910 Service Manual

(14) Gradation Reproduction Failure in Original Higher-Density Areas

<Troubleshooting Procedure>
Step
1 Run "Gradation Adjust" three times using CF paper.
2 Is gradation failure evident on the output
sample?
3 Does gradation failure persist when a
copy is made from the same original?
4 Open the "PRT Max Density" screen from the "Image Adjust" menu available from
the Service mode and check the data shown.
5 Is either "−10" or "+2" shown?
6 Is the output image density low though
"+2" is shown for "PRT Max Density."
7 Is the output image density high though "−
10" is shown for "PRT Max Density."
8 Open the "Life 3 (Others)" screen from the
"Counter" of the Service mode and check
the figures for "Dev." Is the count around
30K?
Check Item
T-77
1144T023AA
Result
YES Go to step 4.
NO This completes the procedure.
NO A. Using
"PRT Highlight" or "PRT
Max Density" screen, adjust
to obtain the correct data.
B. Turn OFF and ON the
Power Switch to complete
the procedure.
YES Perform the troubleshooting
procedure for "Low I.D."
(C0F3 ). (See p. T-84.)
YES Perform the troubleshooting
procedure for "High I.D."
(C0F3 ). (See p. T-82.)
YES Change the developer.
("Developer" and "Gradation
Adjust")
NO Perform the troubleshooting
procedure for "High I.D."
(C0F3 ). (See p. T-82.)
Action
or key on the