EPSON Stylus Scan 2500

Revision A

5.3.6 Head Voltage ID Input

Head voltage value adjustment function enables you to write printhead ID. This operation is considered the most important to maintain proper ink discharging system. If an ID is not written correctly, it results in white or color lines and also cause wrong dot-weight errors. This adjustment is required in the following cases.

1.When exchanging the main board

2.When exchanging the printhead

3.When exchanging the printer mechanism

C A U TWhenI OperformingN this operation, also see Table 5-4 on page 117 to determine what other procedures are necessary.

1.When replacing any of the parts above, make a note of VH voltage ID. You can find the VH voltage ID on the following position:

 

Printhead:

On the top side of the printhead.

T

Printer mechanism:

On the label of the packing box of the

 

 

printer mechanism.

1.Enter the Head ID menu as described in “Using the Service- Adjustment Program” on pag e116.

2.On the Production menu (Figure 5-6),select Head ID. Then click OK in the dialog box that appears.

3.From the Head ID menu, select Print Head ID to verify the voltage

information is enabled.

5.3.7 Head Angular Adjustment

During production, slight variations are created in printheads and carriage (which are used as a printhead base.) The head angular adjustment procedures compensates for these differences so that no banding or color/ white line patterns appear in the printout.

To adjust the printhead angle correctly, an exclusive lever for adjusting the printhead angle is installed on the side of the carriage unit. By moving this lever, you are able to adjust the printhead angle without removing the ink cartridge.

This adjustment is required in the following cases.

 

When a printhead is replaced.

 

When the carriage unit is replaced.

T

When the angle adjustment lever is moved.

Print the check pattern in the adjustment program to determine the angle degree needed for the printhead. Then move the adjustment lever in the carriage unit to set the printhead angle referring to the printed check pattern.

C A U Before or after performing this operation, refer to Table 5-2 and perform appropriate adjustments or operations.

1.Remove the upper case from the main unit. (Refer to Chapter 4.)

2.Enter the Production menu as described in “Using the Service- Adjustment Program” on page 116.

3.On the Production menu (Figure 5-6),select Print - Angular Adj. The

following patterns are printed.

Adjustment

Using the Service-Adjustment Program

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Image 126
Epson Scan 2500 service manual Head Voltage ID Input, Head Angular Adjustment, Following patterns are printed