Adjustment Required Adjustments 101 EPSON WF-4740/EC-4040 Series / WF-4730/EC-4030 Series / WF-4720/EC-4020 Series Revision D Confidential 3.1 Required Adjustments The table from the following page lists the required adjustments depending upon the parts being repaired or replaced. Find the part(s) you removed or replaced, and check which adjustment(s) must be carried out. If the EEPROM data cannot be read out from the old Main Board using the Adjustment Program when replacing the Main Board is required, the Waste Ink Tray Assy must be replaced with the Main Board at the same time. After all required adjustments are complete, use the “Final check pattern print” function to print all adjustment patterns for final check. If you find a problem with the printout patterns, carry out the adjustment again. When replacing the Main Board and the Printer Mechanism at the same time, the adjustment should be made after performing the initial setting. Meaning of the marks used in the tables on the next pages are as follows. • ◯ : Required only when replacing • ◎ : Required when removing and/or replacing • - : No adjustment is required If there are multiple adjustment items for a replaced part, be sure to carry them out in the priority order indicated in the table.