Epson Stylus PRO 7500 Service Manual page 201

EPSON Stylus Pro 7500
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Adjustment Target:There should be no deviation between the lines on the first
pass and the lines on the 2nd pass.
Printed lines in the first pass.
Printed lines in the second pass.
Figure 5-26. Bi-D Adjustment Pattern No. 1 ~ No. 3.
4. Repeat the above steps 2 and 3 in order to carry out the adjustment of Bi-D printing
patterns No. 1 to No. 3.
5. Select "ND Base Value Adjust xx" by pressing the Paper Source Button. Check the
results of printing Bi-D adjustment pattern No. 4 and check whether the following
patterns exist in the 8 patterns each of light cyan, light magenta and yellow. The pattern
No. of each pattern is printed in hexadecimal notation beneath it.
Patterns for Light Cyan
One pattern consists of 4
rectangular patterns.
Figure 5-27. Bi-D Adjustment Pattern No. 4
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Each individual pattern consists of 4 rectangular patterns. Search for the pattern
among the 8 patterns in each color where there is no gap and no overlapping
between these 4 rectangles.
Adjustment
This number printed beneath
each pattern shows the
hexadecimal pattern No.
Adjustment Steps
Figure 5-28. Bi-D Adjustment Pattern No. 4 Check Method
6. If you can confirm a pattern among the 8 patterns of each color where there is no gap
and no overlapping between these 4 rectangles, press the Paper Source button and
move to the adjustment menu for each color. Proceed to Step 11.
If you were unable to confirm an appropriate pattern among the 8 patterns printed in
each color, use the Paper Feed + / – buttons to input an estimated value in the "ND
Base Value Adjust xx" menu.
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Paper Feed + Button:Moves the top 2 out of the 4 patterns within the printed
pattern in a direction so that they separate.
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Paper Feed – Button:Moves the bottom 2 out of the 4 patterns within the printed
pattern in a direction so that they separate.
Input the estimated values in the "ND Base Value Adjust xx" Menu, then press the
Enter button to print a new Bi-D No. 4 print pattern.
7. Repeat the above steps 5 and 6 until the the proper printing pattern can be confirmed.
8. "ND LC: XX" will be displayed in the LCD. In this menu, input the pattern No. of the
pattern among the 8 light cyan printed patterns which was confirmed to be proper using
the Paper Feed + and – buttons. The pattern No. on the printed pattern has the numbers
printed in hexadecimal, with each number incremented by 2 from the number of the
pattern to its left, but in this menu, it is possible to input each of the 16 numbers in
hexadecimal. After inputting a value, press the Enter button.
9. "ND LM: XX" will be displayed in the LCD. In this menu, input the pattern No. of the
pattern among the 8 light cyan printed patterns which was confirmed to be proper using
the Paper Feed + and – buttons. The pattern No. on the printed pattern has the numbers
Revision A
201