Epson Stylus Pro 7500 - Bi-D Adjustment (Round Trip Alignment)

EPSON Stylus Pro 7500 Revision A
Disassembly & Assembly Disassembly Flow 164
BI-D ADJUSTMENT (ROUND TRIP ALIGNMENT)
This adjustment is performed for the following purpose.
n Together with the updating of the new firmware (for pigment ink), the Bi-D
adjustment printing modes have been changed, so it is necessary to make new
adjustments.
The following 4 adjustment items are adjusted in the Bi-D adjustment in the pigment ink
firmware.
NOTE: The numbers in the above table show the number of the printing
adjustment pattern printed out initially when printing the adjustment
patterns.
1. Turn the printer’s power On while pressing the following buttons to start the Self-
diagnostic Mode.
n Paper Feed – button + Paper Feed + button + Cut / Eject button
2. Press the Paper Source button to select “Check: Adjustment” then press the Enter
button.
3. Press the Paper Source button to select “Adj: Bi-d”, then press the Enter button.
4. The message “Pattern printing.” will be displayed in the LCD and the Bi-D
adjustments patterns will be printed out. It takes about one minutes to complete the
print #1,#2,#3,#4 adjustment pattern.
5. When printing of all 4 Bi-D adjustment pattern items is completed, the message “BI-D,
200. M. B: XXX” will be displayed in the LCD.
6. Check printing pattern No. 1 to No. 3, confirming if the vertical lines in the first pass
deviate from the vertical lines printed in the second pass.
o If all lines are correctly lined up as in the following samples in printing patterns
No. 1 to No. 3, press the Paper Source button 3 times and proceed to the printing
pattern No. 4 adjustment menu. (Proceed to Step 8.) Confirm that “Bi-D, 300. N.
C” is displayed in the LCD.
o If some lines are not aligned in printing patterns No. 1 to No. 3, press the Paper
Source button several times to proceed to the adjustment menu for the affected
pattern, then press the Paper Feed + or – button to input the appropriate numerical
value. After inputting the correction value, press the Enter button. The printer will
then print out the pattern with the results of the input correction value.
The relationship between the inputs using the Paper Feed + or – button and the
printing results is as shown below.
n Adjustment Value Minimum Resolution: 1/2880 inch
n Correction Direction :Paper Feed – button = Moves the line on the 2nd
pass toward the HP side.
Paper Feed + button = Moves the line on the 2nd pass
away from the HP .
n Adjustment Target :There should be no deviation between the lines on
the first pass and the lines on the 2nd pass.
Figure 4-134. Bi-D Adjustment Pattern No. 1 ~ No. 3.
7. Repeat the above step 6 in order to carry out the adjustment of Bi-D printing patterns
No. 1 to No. 3.
Table 4-10. Bi-D Adjustment Items
Item Contents No
BiD/200/M/B Bi-D Adjustment / 240 cps / Normal-dot / B head #1
BiD/200/M/C Bi-D Adjustment / 240 cps / Normal-dot / C head #2
BiD/300/N/B Bi-D Adjustment / 333 cps / Normal-dot / B head #3
BiD/300/N/C Bi-D Adjustment / 333 cps / Normal-dot / C head #4
Printed lines in the second pass.
Printed lines in the first pass.