Head Gap Adjustment (Alignment Between Heads) - Epson Stylus PRO 7500 Service Manual

EPSON Stylus Pro 7500
13. "ND Y: 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.
14. Make sure the message "Bi-D End" is displayed in the LCD, then move to the next
adjustment item.
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Up to Bi-D adjustment patterns No. 1 ~ 3, by deciding the value
input from the panel, the adjustment results are printed out, so it
is possible to check the adjustment results visually, but for Bi-D
adjustment pattern No. 4, even if you decide a value to input
from the panel, a printing pattern that reflects the adjustment
results is not printed, so the adjustment results cannot be
checked visually. Therefore, if you are confirming the
adjustment results for adjustment values by printing pattern, the
following adjustment program becomes necessary.
* Program Transfer Utility: Pout3.Exe
* Program Name:Bid333.prn
The program transfer method is as follows.
1) Confirm that the printer is in the Pause state.
2) Move to the adjustment program
3) Input "POUT__BID333.PRN."
4) Press the Enter key.
Through the above operation, a total of 9 blocks of printing
patterns are printed out in each color. The results from the
adjustment values input in the Adjustment mode are positioned
in the center pattern of the 9-block pattern of each color.
Figure 4-137. Bi-D #4 Adjustment Value Check Pattern
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Above mentioned printing pattern is included in the Stylus
Pro7500 Adjustment program also.
Disassembly & Assembly
Adjustment Result

HEAD GAP ADJUSTMENT (ALIGNMENT BETWEEN HEADS)

This adjustment is performed for the following purpose.
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The GAP adjustment printing mode has been changed together with the update to
the new firmware (pigment ink), so a new adjustment is necessary.
The following 2 items related to the GAP adjustment in the pigment ink firmware are
adjusted.
Table 4-11. Head Gap Adjustment Items
Item
Gap/200/M Head GAP adjustment / 240 cps / Normal-Dot
Gap/300/N Head GAP adjustment / 333 cps / Normal-Dot
NOTE: The numbers in the above table are printed at the beginning of the
printing pattern when the adjustment pattern is printed and show the
adjustment pattern No.
1. After inputting the Bi-D adjustment, confirm that "Bi-D END" is displayed in the
LCD. The program will move to the Head Gap adjustment mode, so press the Enter
button.
2. Confirm that "Adj: Head LR Adj" is displayed in the LCD. Press the Enter button to
print the adjustment pattern.
Disassembly Flow
Revision A
Description No
#5
#6
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