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103
5�2 Operation of Test Print
This section describes how to operate the test print function necessary to maintain optimum image
quality.
5�2�1
Outline of Test Print Function
To maintain optimum image quality, the image quality needs to be periodically checked. For this pur-
pose, this machine has the test print function.
When test print is performed, the QC pattern for evaluating the image quality is printed and the density
of the QC pattern is measured with the built-in densitometer at the same time and the density is auto
-
matically checked. You can check the image quality for problems by visually checking the printed QC
patterns. Perform test print for each supply tray. Perform a test print for each supply tray.
Setting Reference Value
A reference value is required to check the density. For this machine, the average of the first three den-
sity values measured when the QC pattern was printed is used as a reference value.
When QC patterns are printed three times with a reference value not set in cases where this machine
is used for the first time (installation) or a reference value is reset, a reference value is automatically
set. The default set for this machine is used for checking the density when a reference value is not set.
“5.2.2 How to Print QC Patterns” (page 104)
Resetting Reference Value
In the following cases, a reference value needs to be reset.
• When the film type has been changed
• When QC patterns have not been printed in the last three months or more
• When a week or more has elapsed without printing QC patterns three times at the time of setting a
reference value
Test Print in Normal Times
After completion of setting a reference value, print QC patterns once a week. Make an assessment as
to the printed QC patterns by visually checking according to the check list and checking the readouts
given by the densitometer built into the main unit. Judge the results of QC patterns as being “OK” or
“NG”. If the results were judged as being “NG”, it needs to be handled as described below.
“5.2.2 How to Print QC Patterns” (page 104)
“5.2.3 How to Judge QC Pattern” (page 105)
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