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Epson Stylus Photo R340 Service Manual: Adjustment By Using Adjustment Program

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EPSON Stylus Photo R340/350

3.2 Adjustment by using adjustment program

The procedures of the adjustment items will be explained here. Servicing Adjustment Item List
The adjustment items of this product are as follows. For details of the adjustment items, refer to the detailed procedures and sketches of the adjustment items.
Function Item
Market Setting
After replacing the Main Board, write the market setting
information onto the new board.
USB ID Input
This adjustment is made to allow the PC to recognize the
connected printers individually when multiple printers of the
same model are connected and used with the PC via a USB
hub.
Head ID Input
At the time of Print Head replacement, this adjustment is
made to correct head manufacturing variations and eliminate
the individual differences of print quality.
Head Angular
This adjustment is made to correct the error in the Print Head
Adjustment
mounting position (angle of the Print Head to the paper
surface) to keep the nozzle intervals uniform in the CR main
scanning direction.
Bi-D Adjustment
This adjustment is made to correct the print timing in the go
and return paths in bi-directional printing.
(This printer carries out printing with PG (typ.) and PG (-))
PW Sensor
This adjustment is made to correct the mounting position of
Adjustment
the PW Sensor on a software basis to minimize the paper
detection error caused by the variations of the mounting
position.
Adjustment
Table 3-2. Adjustment Items
Purpose
After replacing the Main Board, write the market setting information onto the new
board.
Market ID, CSIC
Enter the serial numbers of the printers. The correction value is saved to the
specific EEPROM address on the Main Board.
Enter the ID of the Head QR code label applied to the Print Head to save it to the
EEPROM on the Main Board. (Supplement: Read the QR code label from left to
right on the top row and from top to bottom in due order.)
Print the adjustment pattern. Check the displacement amount of the pattern. Print
the exclusive pattern again and adjust the displacement amount.
Print the adjustment patterns to check the displacement amounts of the patterns.
Select/enter the pattern number that has the smallest displacement amount in the
program. Print the exclusive patterns again and adjust the displacement amount.
The correction value is saved into the EEPROM.
Print the adjustment patterns. Select the pattern number 5mm away from each
edge, and enter that number in the program. The correction value is saved to the
specific EEPROM address on the Main Board.
Adjustment by using adjustment program
Method Outline
Revision A
Used Media
Non-target
Non-target
Non-target
Plain paper (A4)
Photo Quality Ink
Jet Paper (A4)
Plain paper (A4)
101

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