Epson 3800 Service Manual - Page 207

EPSON Stylus Pro 3800/3800C/3850 5.3.4 Print Head Slant Adjustment (CR) † Purpose Check the print head for slanting in the CR direction and corrects if slanted. † Paper Used „ Size: A4/Letter „ Type: Economy Super Fine Paper † Procedure 1. Remove the HOUSING, UPPER. CHECK P O IN T When removing the HOUSING, UPPER, do not remove the LOCK, COVER, ASSY. Keep the ink cover closed and turn the ink cover open sensor ON. 2. Remove the COVER, CR. 3. Attach the OPERATION, PANEL, ASSY to the printer and connect the FFC cable. 4. Turn the printer ON. 5. Start up the Adjustment Program and select [Print Head Slant Adjustment (CR)]. 6. Select [Visual pattern] and click [Print] to print the adjustment pattern. 7. Examine the printout patterns with its print start side facing downward. Use the calibrated magnifying glass to check the point as shown in Figure 5-20. See Figure 5-21 and Figure 5-22 for judging each nozzle row. z OK Pattern: Click [Next] 3 times, and click [Run] on the screen shown in Figure 5-28. The carriage unit will return to its home position. Click [Finish] to finish the adjustment. z NG Pattern: Click [Next] and start adjustment on the next screen o to Step 8 AB CD EF Revision A GH Combination 3 Combination 2 Combination 1 Paper Feed NG 1/4 NG 1/3 1/4 OK 1/4 OK 1/3 NG 1/4 NG 1/3 Combination 1 Divide the interval between the lines printed by one nozzle row into quarters. If the line printed by the other nozzle appear within the two central quarters (the yellow-shaded area), adjustments are not needed. Combination 2, 3 Divide the interval between the lines printed by one nozzle row into thirds. If the line printed by the other nozzle appear within the central third (the yellow-shaded area), adjustments are not needed. CR_Slant_Pattern_01 Figure 5-20. Adjustment Pattern ADJUSTMENT Standard Adjustment 207