Service manual

FrameMaker Ver5.5E(PC) CF3102/CF2002 SWITCHES ON PWBs/TECH. REP. SETTINGS
02.06.05
S-41
Gradation Adjust
Item Purpose Setting/Precautions
8 Color Solid
Pattern
To produce an 8-color solid
pattern.
Used for checking color
reproducibility and
uneven density of each
color.
• Select SINGLE (single copy) or MULTI
(multi copy).
• . Select FEET or HYPER.
• .SelectGradation or Resolution.
• . Type the density level (0 to 255).
LPH Pattern
To produce an LPH pattern.
Used for LPH chip-to-
chip correction
• Select SINGLE (single copy) or MULTI
(multi copy).
• Select FEET or HYPER.
• Select Gradation or Resolution.
• Select to turn ON or OFF the Border Line.
Purpose Setting/Precautions
To correct gradation reproduc-
tion after the setup procedure
has been completed or when
color reproducibility is poor.
The “Adj. Value” for “Max” and
“Highlight” shownontheGra-
dation Adjust screen repre-
sents the degree of correction
made to produce an output of
an ideal image and “Conv.
Value” represents the differ-
ence from an ideal image
density.
The image is more ideal when
the “Conv. Value” is closer to
0.
• Press the Start key, which will let the copier produce a
test pattern. Now. place the test pattern on the Origi-
nal Glass.
• Place ten blank sheets of A3 or 11”
× 17” paper on the
test pattern, lower the Original Cover, and press the
Start key.
• The copier then starts scanning the test pattern. On
completing the scanning sequence, the copier displays
the results of Gradation Adjust.
• Repeat these steps two more times to let the copier
carry out Gradation Adjust sequences a total of three
times.
• Select Gradation Adjust and check the data for “Conv.
Value.”
• Complete the adjustments if the values for “Max” fall
within the range of 0 +/-100 and for “Highlight” within
the range of 0 +/-60. If values fall outside the ranges,
carry out Gradation Adjust once again.
• If a total of four Gradation Adjust sequences do not
bring the values into the specified ranges, check the
image.
• If the image is faulty, perform troubleshooting proce-
dures for image problems.