Epson Stylus Color 440, Service Manual

Page: 130 / 212

EPSON Stylus Color 440/640/740 Revision A
Chapter 5 Adjustment 130
5.1 Overview
This chapter describes adjustments required when the printer is
disassembled and assembled after repair.
5.1.1 Required Adjustments
Stylus Color 440/640/740 require the following adjustments. (Refer to
Table 5-1) Perform any necessary adjustment referring to the figures
and procedures described throughout this chapter.
Table below shows the actions taken and required adjustments in the
order to be performed.
Table 5-1 Adjustment Required
No. Adjustment Item Conditions
1 Parallelism Adjustment • When you replace or remove the Carriage
guide shaft.
• When you move the parallelism adjustment
bushing.
2 Initial Ink Charge • When you replace or remove the printhead.
3 Head Voltage ID Input • When you replace the printhead.
• When you replace the main board.
Note) The values stored in this address are not
erased by EEPROM reset operation.
4 Printing Head Angle
Adjustment • When you replace or remove the printhead.
• When you move the printhead angle adjusting
lever.
5 Bi-D Adjustment • When you replace or remove the printhead.
• When you replace the main board.
• When you replace the CR Motor.
Table 5-2 Actions Taken and Adjustment Required
No. Content of Operation Adjustment Procedure
1 Removal of the printhead 1. Perform initial ink charge.
2. Perform printhead angle adjustment.
3. Perform Bi-d Adjustment.
2 Replacement of the printhead 1. Perform Vh voltage writing operation.
2. Perform initial ink charge.
3. Perform printhead angle adjustment.
4. Perform Bi-d Adjustment.
3 Replacement of the main board 1. Perform Vh voltage writing operation.
2. Perform Bi-d adjustment.
3. Perform CG TAble setting (only for
Stylus Color 740)
4 Replacement or Removal of the
Carriage Unit 1. Perform parallel adjustment.
2. Perform printhead angle adjustment.
3. Perform Bi-d adjustment.
5 Replace of the CR Motor 1. Perform Bi-d adjustment.
6 Replacement of the Printer
Mechanism 1. Perform Head Voltage ID Input.
2. Perform initial ink charge.
3. Perform Bi-d adjustment.