Epson 50 - Artisan 50 - Printer, Service Manual

Page: 105 / 129

Epson Stylus Photo R280/R285/R290/Epson Artisan 50/Epson Stylus Photo T50/T59/T60/P50 Revision C
Chapter 5 Adjustment 5.1 Adjustment Items and Overview 105
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 5mm 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/PFP adjustment
This adjustment is made to ensure high print quality at high print speed.
For more details, see
“2.2 Banding Reduction System (BRS) / Paper
Feed Amount Profile Correction (PFP) (p.25)
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.
• 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