Epson L800 Service Manual page 72

L800/L801
Adjustment Item
This must be carried out after replacing the printhead in order to correct
Head angular adjustment
tilt of the printhead by software.
Corrects print start timing in bi-directional printing to improve the print
Bi-D adjustment
quality.
Corrects left margin of printout. The print start position in the carriage
First dot position
moving direction is corrected by software.
adjustment
This adjustment is made to correct the mounting position of the PW
PW adjustment
Sensor on a software basis to adjust the detection position and Nozzle
position dispersion.
Corrects variations in paper feed accuracy when using the Microweave
PF adjustment
to achieve higher print quality.
This adjustment is made to ensure high print quality at high print speed. Print the adjustment pattern to be scanned by a specified scanner.
BRS/PFP adjustment
This must be carried out for efficient heat control of the CR motor.
CR motor heat protection
Electrical variation of the motor and the power supply board are
control
measured to acquire correction values for them.
Adjustment
Table 2-1. Adjustment Items
Purpose
Adjustment Items and Overview
Method Outline
A head angular adjustment pattern is printed. Examine the printed lines
and enter the value for the most straight lines.
A Bi-D adjustment pattern is printed. Examine the patterns and enter
the value for the pattern with no gap and overlap for each mode.
A first dot adjustment pattern is printed. Examine the lines printed near
the left edge of the printout and enter the value for the line that is
exactly 5 mm away from the left edge.
A PW adjustment pattern is printed. Examine the printout patterns and
enter the value for the line that is exactly 5mm away from the paper
edge for each of the left, right, top and bottom.
A PF adjustment pattern is printed. Examine the printout patterns and
select the value for the best pattern. The correction value is registered.
According to the scanned result, a correction value is automatically
calculated and stored into the serial flash ROM on the main board.
The correction value is applied when printing in the corresponding
mode. For some scanners, two PFP base scales are required. See
Banding Reduction System (BRS) Adjustment / Paper Feed Amount
Profile (PFP) Correction (p.83)".
Select the parts that you replaced. The correction values are
automatically written to the main board.
Revision A
Tool
• Adjustment Program
• Adjustment Program
• Adjustment Program
• Ruler
• Adjustment Program
• Specified Scanner
• PFP base scale
"2.3
• Adjustment Program
71
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