Epson Stylus Pro 7500, Service Manual

Page: 167 / 274

EPSON Stylus Pro 7500 Revision A
Disassembly & Assembly Disassembly Flow 167
3. After all the adjustment patterns (#5, #6) are printed, “Gap, 200 , M: XXX” will be
displayed in the LCD.
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.
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.
Black Vertical
Lines
Light Cyan Vertical Lines
This pattern
has no relation
to the Gap
adjustment.