Epson 440 User Manual download pdf (Page 130)

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.

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