Head Gap Adjustment - Epson Stylus Color 1520 Service Manual

4.1.8 Head Gap Adjustment

This operation is required when the black and/or color printheads are removed or replaced. It is performed to
align the vertical lines between the black and color printheads.
1. Connect the printer to the host computer with a parallel interface cable.
2. Run the adjustment program on the host computer.
3. Input the customer data. (Refer to Section 4.1.2.)
Move the cursor using ↑ or ↓ to select ADJUST in the 1st menu. Then press Enter; the main menu
4.
appears on the monitor.
Move the cursor using ↑ or ↓ to select HEAD GAP ADJUSTMENT. Then press Enter; the printer prints out
5.
the printhead gap adjustment patterns in both LQ and SLQ modes.
6. Adjust the deviation, referring to the flowchart below to make the deviation (D) less than twice the line
width in the LQ mode and 1/4 of the line width in the SLQ mode. (Refer to Figure 4-9.)
Select HEAD GAP ADJUSTMENT
from the main menu.
Print out the head gap adjustment
pattern in LQ and SLQ modes.
Return to the main menu.
1. Press the Space key to repeat the operation. Press Enter to exit HEAD GAP ADJUSTMENT; the main menu
appears.
Select other adjustments using ↑ or ↓, or select RETURN TO 1st MENU to exit the main menu.
2.
Move the cursor using ↑ or ↓ to select END and press Enter to exit the adjustment program.
3.
;
Adjusted values are not stored in the EEPROM until the printer is turned off. Therefore be sure to
turn off the printer once after the adjustment program is executed.
;
The set values are transferred to the printer when exiting this operation. Therefore do not turn off the
printer before executing " HEAD GAP ADJUSTMENT" .
Start
In which direction
is printing skewed?
How is the
head gap?
WRONG
OK
Enter the value
using the ↓ key.
Press Enter.
Print out the head gap adjustment
pattern in LQ and SLQ modes.
Figure 4-9. Head Gap Adjustment Flow
CAUTION
Enter the value
using the ↑ key.
Enter 0.
WRONG
How is
the head gap Press the Space key.
now?
OK
Adjustment
(D)
4-11