Epson Stylus PRO 7500 Service Manual page 167

EPSON Stylus Pro 7500
3. After all the adjustment patterns (#5, #6) are printed, "Gap, 200 , M: XXX" will be
displayed in the LCD.
Black Vertical
Lines
This pattern
has no relation
to the Gap
adjustment.
Figure 4-138. Head Gap Adjustment Pattern
4. Check printing patterns No. 5 and No. 6, and check for alignment of the black vertical
lines in the 1st and 3rd pass and in the light cyan vertical lines in the 2nd pass.
o
If black vertical lines ans the light cyan vertical line are lined up correctly, in the
patterns in printing patterns No. 5 and No. 6, press the Paper Source button 2
times, then check if the message "GAP END." is displayed in the LCD. Proceed to
Step 6.
o
If black vertical lines and the light cyan vertical line are not lined up correctly in
the patterns in printing patterns No. 5 or No. 6, press the Paper Source button to
move to the corresponding pattern adjustment menu, then input the appropriate
numerical values using the Paper Feed + / – keys. After inputting the correction
value, press the Enter button to print the results of the input correction values. The
relationship between the inputs using the Paper Feed + / – buttons and the printing
results is as shown below.
Disassembly & Assembly
Light Cyan Vertical Lines
Disassembly Flow
n
Adjustment value minimum resolution:1/2880 Inch
n
Correction Direction: Paper Feed – Button = Moves the black lines in the
1st and 3rd passes toward the HP side.
Paper Feed + Button = Moves the light cyan lines in
the 2nd pass away from the HP side.
n
Adjustment Target: There should be no deviation in the black lines and
the light cyan lines.
5. Repeat the above steps 3 and 4 until the adjustment of patterns No. 5 and No. 6 is
completed.
6. After confirming that "GAP END." is displayed in the LCD, execute the final check
items.
Revision A
167