Epson Stylus 800, Stylus 1000 Service Manual 4

Chapter 4

Adjustment

4.1 Over View.................................................................................................................1

4.1.1 Adjustment Required ................................................................................................................ 2

4.1.2 Adjustment Tools....................................................................................................................... 3

4.2 Adjustment...............................................................................................................4

4.2.1 Platen Gap (PG) Adjustment .................................................................................................... 4

4.2.2 Input of Customer Data............................................................................................................. 7

4.2.3 Ink Charge.................................................................................................................................. 8

4.2.4 Write to the Head Voltage Value............................................................................................. 10

4.2.5 Head Angular Adjustment....................................................................................................... 13

4.2.6 BK.-Linear Adjustment............................................................................................................ 16

4.2.7 Head GAP Timing Adjustment................................................................................................18

4.2.8 Bi-d adjustment ....................................................................................................................... 22

Adjustment

4.1 Overview

This section describes adjustment required when the printer is reassembled after repair. Read the instructions headed under “CAUTION” before starting adjustment.

CAUTION

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Always perform adjustment using the program specified for each unit.

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Ink cartridge used for this printer is one-time-cartridge. If the same c artridge is r einstalled, bubbles are formed in the printhead, which might cause dot missing. Therefore always install a new cartridge after removing the used one for repair.

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The ink consumption counter is reset when the cartridge is replaced during the ink cartridge change sequence. Therefore be sure not to replace the ink cartridge without putting the printer in the ink cartridge change mode.

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Use 720 dpi exclusive paper when printing the adjustment pattern.

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Perform the each adjustment by using exclusive adjustment program.

Rev. A

4-1

EPSON Stylus

&RORU

800

4.1.1 Adjustment Required

This section gives inf orm ation on the adjustm ent required af ter disass embling and r eassem bling. Be sure to perform the specif ied adjustment whenever you remove or replace the part for repair. Table 4- 1 lists the required adjustments for several units and corresponding adjust items, which must be accomplished in the order instructed in Table 4-1.

Table 4- 1. Required Adjustment

Replaced Unit/Part Adjustment Item and the Corresponding Menu

Printer Mechanism

C202 MAIN Board

Printhead

After disassembling and reassembling the CR unit

Top frame

CR motor Ink drain pad 1. EEPROM reset (Refer Chapter 6)

Note) * The adjusting program doesn’t run without inputting the customer data.

1. Customer data writing operation * :Input of Customer data

2. Initial ink charge :Ink charge

3. Head VH voltage input :Write to the Head voltage value

4. Head gap adjustment :Head GAP timing adjustment

5. Bi-d adjustment :Bi-d adjustment

1. Customer data writing operation * :Input of Customer data

2. Head VH voltage input :Write to the Head voltage value

3. Head gap adjustment :Head GAP timing adjustment

4. Bi-d adjustment :Bi-d adjustment

5. Ink drain pad replacement (Refer to Chapter 6 Maintenance.)

Note) Whenever C202MAIN board is replaced with a new one, all stored

data of EEPROM is lost. This means that the ink consumption counter is lost. Therefore, whenever C202MAIN Board is replaced, the printer must be equipped with a new ink cartridge. Above listed adjustment items must be executed after replacing the ink cartridge with a new one.

1. Customer data writing operation * :Input of Customer data

2. Initial ink charge :Ink charge

3. Head VH voltage adjustment :Write to the Head voltage value

4. Head angular adjustment :Head angular adjustment

5. Black/color head vertical adjustment:BK.-M Linear adjustment

6. Head gap adjustment :Head GAP timing adjustment

7. Bi-d adjustment :Bi-d adjustment

1. Platen gap adjustment

2. Customer data writing operation * :Input of Customer data

3. Head angular adjustment :Head angular adjustment

4. Black/color head vertical adjustment:BK.-M Linear adjustment

5. Head gap adjustment :Head GAP timing adjustment

6. Bi-d adjustment :Bi-d adjustment

1. Platen gap adjustment

2. Customer data writing operation * :Input of Customer data

3. Bi-d adjustment :Bi-d adjustment

1. Customer data writing operation * :Input of Customer data

2. Bi-d adjustment :Bi-d adjustment

Rev. A

Adjustment

4.1.2 Adjustment Tools

Table 4-2 shows the tools necessary to adjust this printer and the menus to be adjusted.

Table 4- 2. Adjustment Tools

Tools for adjusting Item to be adjusted

Program disk for adjustment y DOS system y GWBASIC y Adjustment program (Version J70C00E)

Thickness gauge (1.1 mm)  Platen gap adjustment

The program disk for adjustment consis ts of the total of 40 files such as DOS system, GW BASIC.EXE, and adjusting programs. The adjusting menus in the program are as shown below:

 Customer data writing operation  Initial ink charge (Ink charge)  Head voltage adjustment  Head angular adjustment  Black/color head vertical adjustment  Head gap adjustment  Bi-d adjustment

Main menu

Input of Customer data

Adjustment/Print inspection

Change of center value

Input of comment

Change of date

Change of time

End

Select Menu :?_

Sub menu

Ink charge

Write to the Head voltage value

All adjustment

Head angular adjustment

BK.-M Linear adjustment

Head GAP timing adjustment

Bi-d adjustment

Print inspection

Ink discharge

Customer data change/End

Select Menu :?_

Print inspection sub menu

Input M/C No. : ?_

Black voltage value :

Color voltage value :

GOS paper print test

S.F. paper print test

O.Q.A print test

Cleaning

Return to the MENU

Letter paper print test

Select Menu :?_

Figure 4-1. Adjustment Program Menu

Select the item in the light gray shaded box to perform necessary adjustment. You can proceed to the sub menu thorough the item in the dark gray shaded box in the bold line. Selecting “All adjustment” in the sub menu enables you to perform the following adjus tments consec utively; “ Head angular adjustment”, “BK.-M Linear adjustment” and “Head G AP adjustment/Bi-d adjustment” T his sec tion, however, only refers to the individual adjustment methods.

CAUTION

During adjustment, values such as Customer data, head voltage value, head gap adjustment

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value, and Bi-d adjustment value are written into the EEPROM at the specified timing as follows;

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Customer data : At performing “Print Inspection”.

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Head voltage value : When the “Return” key is pressed after entering the

values during “Write to the Head voltage value” menu . The data is then transferred to the printer.

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Bi-d/ Head gap adjustment value: At performing “Print Inspection”.

Rev. A

EPSON Stylus

&RORU

800

4.2 Adjustment

This section provides detailed information on how to perform the adjustments listed below and the notice headed under “CAUTION”.

 Platen gap adjustment  Customer data writing operation  Initial ink charge  Head voltage data writing operation  Head angular adjustment  BK-M Liner adjustment  Head gap adjustment  Bi-d adjustment

4.2.1 Platen Gap (PG) Adjustment

This adjustment is performed to obtain the appropriate gap between the head nozzle surface and the platen, and is necessary when the parallelism adjust bushing has been set off the position during disassembling and ass embling. which is adjusted by inserting the thickness gauge between the head nozzle surface and platen then turning the both left and right parallelism adjust bushings. This section describes how to adjust the PG gap in the correct order along with cautions.

The standard value for the platen gap w ith this printer is 1.1 mm

CAUTION

Never touch the thickness gauge with your bare hand.

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Make sure there is no oil, foreign object, and rust on the thickness gauge.

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Check if your thickness gauge is not warped by checking it with the flat surface or new gauge.

1. Set the PG lever to “+” (wide) position and shift the CR unit left. Then place the thickness gauge by sliding it from the rear (PF roller side) into the front. In this time, don’t contact the thickness gauge to the PF roller surface.

CAUTION

Be sure to level the thickness gauge when placing it onto the diamond cut rib on the platen plate.

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2. Set the PG lever to “0” (narrow) position and shift the CR unit from left to right or vice versa by holding the upper side of the timing belt.

Printer Mechanism Viewed from the Left Side

Thickness Gauge

Black Head

Printer Mechanism Viewed from the Front

Color Head

Thickness Gauge

PF Roller

Platen

Diamond Rib

Figure 4-2. Thickness Gauge Setting

Diamond Rib

Rev. A

Adjustment

3. Turn the left parallelism adjust bushing to the rear (narrower) step by step toward the left parallelism adjust bushing set position, where the thickness gauge starts shif ting together with the CR unit. Then shift the lever one step back to the front (wider) from the adjusted position.

Left Parallelsm Adjust Bushing

Rear side (Close)

Push to the rear

Viewed from the Left Frame Side

Figure 4-3. Left Parallelism Bushin

4. Hold the upper side of the timing belt and slide it to move the CR unit from right to left or vise versa to confirm that the thickness gauge set on the platen does not move.

5. Return the PG lever toward “+” (wide) direction to remove the thick ness gauge, and slide the CR unit right. Then place the thickness gauge by sliding it from the rear (PF roller side) into the f ront. During this operation, don’t contact the PF roller surface with the thickness gauge.

6. Set the PG lever to the ”0” (narrower) position and shift the CR unit from left to right or vice vers a by holding the upper side of the timing belt.

7. Turn the right parallelism adjust bushing to the rear step by step to the right parallelism adjust bushing set position where the thickness gauge starts moving together with the CR unit. Then shift the lever one step back to the front (wider) from the adjusted position.

8. Hold the upper side of the timing belt and slide it to move the CR to conf irm that the thick nes s gauge set on the platen does not move.

Front side (Open)

Pull forward

Right Parallelism Adjust Bushing

Front side (Open)

Pull forward

Viewed from the Right Frame Side

Figure 4-4. Right Parallelism Bushing

9. Repeat the steps from 1 to 4 at the left end to confirm that the gap is correctly adjusted.

10. If the correct adjustment is confirmed, fix the left and right parallelism adjust bushings with the screws (CBS, 3X6).

Rear side (Close)

Push to the rear

CAUTION

When fastening the screws, be careful not to dislocate bushings from the adjusted position

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The tightening torque for the screws (CBS, 3X6) is 4.5 kg ~ 5.5 kg-cm.

Rev. A

EPSON Stylus

&RORU

800

CAUTION

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After performing the PG gap adjustment, make sure that the “Cleaner Head” and head nose are in contact with each other by the proper portion by following the instruction below.

11. Set the “PG Lever” to the “+” (wide) position.

12. Release the “CR Lock Lever” by turning it forward using the tweezers, and shif t the CR unit f rom the CR home position to the right end of the “Front Paper Guide“. Then set the “Head Cleaner” to the wiping/rubbing position by turning the larger gear of the “Pump Motor Reduction Gear” in counter clock wise direction (forward).

CAUTION

Make sure that the “Change Cam” is set to the pump drive side during this operation. (Refer to

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Figure 2-10 and 3-66 for the cam position.)

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Stop turning the “Pump Reduction Gear” when you feel any resistance while turning the gear.

13. Slide the CR unit from left to right or vice versa by holding the upper side of the “Timing Belt” (or top edge of the CR unit). Then check if the “Head Cleaner” and color head nose (metallic fram e part of the head) come in contact with each other by 5 mm or more.

Carriage

Head Nose

Head Cleaner

Figure 4-5. Contact Area of the Color Head and Head Cleaner

Contact Area :

0.5 mm or more

CAUTION

When sliding the “Head Cleaner” to the metallic frame part of the head, be careful not to slide into

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the head surface beyond the metal frame.

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Check the “Cleaner Head” from the front left of the printer whether the contac t portion of the color head and head cleaner is appropriate.

14. If you confirm the proper contact, return the large gear of the “Pum p Reduction Gears” in clock wise direction to position the cleaner head under the “Sub Cable Holder” securely. If the portion is not correct, check the positions for the “Head Cleaner” and “Pump Unit”, and replace the parts if necessary.

15. Return the “CR unit” to the home position manually and set the “PG Lever” bac k to the “0” (narrow) position.

Rev. A

Adjustment

4.2.2 Input of Customer Data

This operation is required when the C202 MAIN board is replaced. The program for this adjustment is used to write the Customer data (set for each destination) into the EEPROM on the ASP C202 MAIN board. If this program is not properly operated, it might caus e failure in reading CG data and installing various types of utility using Bi-directional interface. The procedure for this operation is described below.

Customer data writing is programmed to be performed ahead of other adjustments. Therefore you

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cannot proceed to any other adjustments without executing this operation first.

1. Set this program to FFD on your PC and turn the PC on.

2. The program automatically sets up and the following menu appears on the screen.

Stylus COLOR 800 J70C00E Customer : Standard Customer DATA <

> 12-03-1996

****

3. Enter “1” for

4. Press

“ENTER”

Input Customer data Adjustment/Print inspection Changing of center value Input of comment Change of date Change of time END

Select Menu ?_

“Select menu :?”

key, and the menu below appears.

Stylus COLOR 800 J70C00E Customer : Standard Customer DATA <

Input Customer data Adjustment/Print inspection Changing of center value Input of comment Change of date Change of time END

to select “

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Figure 4-6. Main Menu

Input of Customer data

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........................

..........................

..............

................

..............

................

1 2 3 4 5 6 9

> 12-03-1996

****

1 2 3 4 5 6 9

” in the menu.

Select Menu : 1

Input the customer data

Memory-SW data (4col data) : ?

Figure 4-7. Input of Customer Data

5. Enter the 4-column code which corresponds to the destination for and press

6. After performing necessary adjustments , store the setting values in the EEPROM on the C202 MAIN board by selecting and performing

“ENTER”

key. The customer codes for each destination is listed below:

0000 : EAI, EAI (Latin) 0101 : EDG (NLSP) EDG (NLSP) 0001 : Europe Standard (EDG, EFS, EIS, EIB, EUL)

“Print Inspection”

in the sub menu.

Rev. A

“Memory-SW data (4 col data)”

+ 18 hidden pages