Service manual

Epson Stylus Photo PX650/TX650/TX659/PX660/PX660 Premium/Artisan 635 Revision C
ADJUSTMENT Adjustment Items and Overview 112
Confidential
Bi-D adjustment
Corrects print start timing in bi-directional printing to improve the print
quality.
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.
• Adjustment Program
First dot position
adjustment
Corrects left margin of printout. The print start position in the carriage
moving direction is corrected by software.
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.
• Adjustment Program
•Ruler
PW adjustment
This adjustment is made to correct the mounting position of the PW
Sensor on a software basis to adjust the detection position and Nozzle
position dispersion.
A PW adjustment pattern is printed. Examine the printout patterns and
enter the value for the line that is exactly 5 mm away from the paper
edge for each of the left, right, top and bottom.
PF adjustment
Corrects variations in paper feed accuracy when using the Microweave
to achieve higher print quality.
A PF adjustment pattern is printed. Examine the printout patterns and
select the value for the best pattern. The correction value is registered.
• Adjustment Program
BRS adjustment
This adjustment is made to ensure both high print quality (less banding)
and high print speed in the target print mode by carrying out 1-path
printing correcting ink drop amount for each raster mode.
Print the adjustment pattern to be scanned by a specified scanner.
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 more details, see "5.4 Banding Reduction System (BRS)
Adjustment/Paper Feed Amount Profile (PFP) Correction (p.122)
• Adjustment Program
• Specified Scanner
• PFP base scale
PFP adjustment
This adjustment is made to ensure both high print quality and high print
speed in the target print mode by measuring the paper feed errors at
various points and calculating a correction value for each of the points.
Print the adjustment pattern to be scanned by a specified scanner.
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 more details, see "5.4 Banding Reduction System (BRS)
Adjustment/Paper Feed Amount Profile (PFP) Correction (p.122)
• Adjustment Program
• Specified Scanner
• PFP base scale
CR motor heat protection
control
This must be carried out for efficient heat control of the CR motor.
Electrical variation of the motor and the power supply board are
measured to acquire correction values for them.
Select the parts that you replaced. The correction values are
automatically written to the main board.
• Adjustment Program
Table 5-1. Adjustment Items
Adjustment Item Purpose Method Outline Tool