Epson Stylus Color 400 User manual

Brand: Epson

Model: Stylus Color 400

Type: User manual

Epson Stylus Color 400 is a high-quality, versatile printer that offers a wide range of features to meet your printing needs. With its advanced printhead technology, the Stylus Color 400 delivers sharp, vibrant prints with exceptional detail. It also features a variety of paper handling options, including the ability to print on specialty media such as photo paper and transparencies. In addition, the Stylus Color 400 is easy to use, with a user-friendly control panel and intuitive software. Whether you're printing photos, documents, or anything in between, the Epson Stylus Color 400 is a great choice for home or office use. Here are some of the key features and capabilities of the Epson Stylus Color 400:

EPSON Stylus COLOR 400 Service Manual 3-i

3. Disassembly and Assembly

3.1 Overview .....................................................................................................................3-1

3.1.1 Precautions for Disassembling the Printer..........................................................3-1

3.1.2 Tools .................................................................................................................3-2

3.1.3 Specifications for Screws...................................................................................3-3

3.1.4 Service Checks After Repair...............................................................................3-3

3.2 Disassembly Procedures....................................................................................................3-5

3.2.1 Removing the Housing.......................................................................................3-6

3.2.2 Removing the Board Assemblies........................................................................3-7

3.2.3 Removing the Control Panel...............................................................................3-9

3.2.4 Disassembling the Printer Mechanism..............................................................3-10

3.2.4.1 Removing the Printhead Unit...........................................................3-10

3.2.4.2 Removing Waste Ink Drain Pad Tray Assembly A............................3-12

3.2.4.3 Removing the Pump Assembly and Cap Assembly..........................3-13

3.2.4.4 Removing the CR Motor Assembly..................................................3-15

3.2.4.5 Removing the PF Motor Assembly...................................................3-17

3.2.4.6 Removing the ASF Assembly ..........................................................3-19

3.2.4.6.1 Removing the Paper Feed Roller Assembly.....................3-20

3.2.4.6.2 Removing the Right and Left LD Roller Assemblies.........3-21

3.2.4.7 Removing the Carriage Assembly....................................................3-22

3.2.4.8 Removing the PF Roller Assembly...................................................3-24

3.2.4.9 Removing the PE Paper Sensor Assembly.......................................3-25

3.2.4.10 Removing the HP Sensor...............................................................3-27

Disassembly and Assembly

3-ii EPSON Stylus COLOR 400 Service Manual

Disassembly and Assembly

EPSON Stylus COLOR 400 Service Manual

3.1 OVERVIEW

This section describes procedures for disassembling the main components of the EPSON Stylus COLOR

400. Unless otherwise specified, disassembled units or components can be reassembled by reversing the

disassembly procedure. Therefore, no assembly procedures are included in this section. Precautions for any

disassembly or assembly procedure are described under the heading “Points to Note.” Adjustments required

after disassembling the units are described under the heading “Required Adjustment.”

3.1.1 Precautions for Disassembling the Printer

See the precautions below when disassembling or assembling EPSON Stylus COLOR 400.

Disconnect the power cable before disassembling or assembling the printer.

Wear goggles to protect your eyes from ink. If ink gets in your eye, flush it with fresh water and see a

doctor immediately.

If ink comes into contact with your skin, wash it off with soap and water. If irritation occurs, contact a

physician.

A lithium battery is installed on the main board of this printer. Be sure to observe the following

instructions when servicing the battery:

• Keep the battery away from any metal or other batteries so that electrodes of the opposite

polarity do not come in contact with each other.

• Do not heat the battery or put it near fire.

• Do not solder on any part of the battery. (Doing so may result in leakage of electrolyte from the

battery, burning, or explosion. The leakage may affect other devices close to the battery.)

• Do not charge the battery. (An explosion may be generated inside the battery, and cause burning

or explosion.)

• Do not dismantle the battery. (The gas inside the battery may hurt your throat. Leakage, burning,

or explosion may also result.)

Do not install the battery in the wrong direction. (This may cause burning or explosion.)

Danger of explosion if the battery is incorrectly replaced. Replace only with the same or equivalent

type recommended by the manufacturer. Dispose of used batteries according to government

’

s law

and regulations.

Risque d

’

explosion si la pile est remplac

e incorrectment. Ne remplacer que par une pile du m

me type

ou d

’

un type

quivalent recommand

par le fabricant. Eliminer les piles d

charg

es selon les lois et les

gles de s

curit

en vigueur.

WARNING

Disassembly and Assembly

EPSON Stylus COLOR 400 Service Manual

Never remove the ink cartridge from the carriage unless the manual specifies to do so.

When transporting a printer after repair, be sure to pack the printer for transportation with the ink

cartridge installed.

Use only recommended tools for disassembling, assembling, or adjusting the printer.

Apply lubricants and adhesives as specified. (See Chapter 6 for details.)

Make specified adjustments when you disassemble the printer. (See Chapter 4 for details.)

When assembling the printer, if ink cartridge is removed and needs to be installed again, make sure

to install new ink cartridge for the following reasons:

Once the ink cartridge mounted on the printer is removed, air comes in and forms bubbles in the

cartridge. These bubbles clog the ink path and cause printing malfunctions. If an ink cartridge still

in use is removed and installed again, ink quantity will not be detected correctly, since the counter

to check ink consumption is cleared.

For the reasons above, be sure to return the printer to the user with a new ink cartridge installed.

3.1.2 Tools

Table 3-1 lists the tools recommended for disassembly, assembly, or adjusting the printer. Use only tools that

meet these specifications.

Tool Commercially

Available

EPSON Part Code

Phillips (+) Driver No. 2 Yes B743800200

Phillips (+) Driver No.1 Yes B743800400

Tweezers Yes B741000100

Hexagon Box Driver

(Opposite side: 5.5 mm)

Yes B741700100

CAUTION

Table 3-1. Recommended Tools

Disassembly and Assembly

EPSON Stylus COLOR 400 Service Manual

3.1.3 Specifications for Screws

Table 3-2 below shows and describes screws used in this printer. During assembly and disassembly, verify

the locations of different types of screws by referring to the table below. The screw number in the text

corresponds to the number (No.) in the table below.

No. Body Name Size

(+) Bind, S-tight M3 x 6

2 (+) Bind, S-tight M3 x 10

(+) Bind, P-tight

(CBP tight)

M3 x 6

4 (+) Bind, P-tight

(CBP tight)

M3 x 10

5 (+) Bind, P-tight

(CBP tight)

M3 x 8

(+) Pan head

(CP)

M3 x 4

(+) Bind, S-tight, Sems

(CBS Sems)

M3 x 6

Table 3-2. Screw Characteristics

Disassembly and Assembly

EPSON Stylus COLOR 400 Service Manual

3.1.4 Service Checks After Repair

Before returning the printer after service, use the check list in Table 3-3, which provides a record to

make servicing and shipping more efficient.

Category Component Item to Check Is Check Required?

Self-test Is operation normal?

Checked Not necessary

On-line test Was the on-line test successful?

Checked Not necessary

Printhead Is ink ejected normally from all

nozzles?

Checked Not necessary

Carriage

mechanism

Does carriage move smoothly?

Checked Not necessary

Is there abnormal noise during

movement?

Checked Not necessary

Any dirt or debris around the

carriage guide shaft?

Checked Not necessary

Printer units Is the CR motor at the correct

temperature (not overheating)?

Checked Not necessary

Paper feed

mechanism

Is paper fed smoothly?

Checked Not necessary

Does paper jam?

Checked Not necessary

Does paper skew during paper

feeding?

Checked Not necessary

Are sheets multi-fed?

Checked Not necessary

Does the PF motor overheat?

Checked Not necessary

Is there abnormal noise during

paper feeding?

Checked Not necessary

Is the paper path clear of all

obstructions?

Checked Not necessary

Adjustment Adjustment points Are adjustments correct?

Checked Not necessary

Lubrication Lubrication points Was lubrication applied to the

specified points? (CAUTION: Do

not apply too much lubricant.)

Checked Not necessary

Is the quantity of lubrication

adequate? (CAUTION: Do not

apply too much lubricant.)

Checked Not necessary

Firmware ROM version Newest version?

Checked Not necessary

Shipment

package

Ink cartridge Is the ink cartridge installed

correctly?

Checked Not necessary

Protection during

transport

Are all parts firmly attached?

Checked Not necessary

Others Attached items Are all attached items from users

included?

Checked Not necessary

Table 3-3. Inspection Checklist for the Repaired Printer

Disassembly and Assembly

EPSON Stylus COLOR 400 Service Manual

3.2 Disassembly Procedures

The figure below shows procedures for disassembly.

Remove

Housing

3.2.1

Remove

Board Assemblies

3.2.2

Remove

Control Panel

3.2.3

Remove Printer

Mechanism

3.2.4

Refer to

Remove

Printhead Unit

3.2.4.1

Remove Waste

Ink Pad Tray

Assembly A

3.2.4.2

Remove Pump

Assembly and

Cap Assembly

3.2.4.3

Remove CR

Motor Assembly

3.2.4.4.

Remove PF

Motor Assembly

3.2.4.5

Remove ASF

Assembly

3.2.4.6

Remove CR

Assembly

3.2.4.7

Remove PF

Roller Assembly

3.2.4.8

Remove PE

Sensor Assembly

3.2.4.9

Remove HP

Sensor

3.2.4.10

Remove Right

and Left LD

Roller Assemblies

3.2.4.6.2

Remove Paper

Feed Roller

Assembly

3.2.4.6.1

Figure 3-1. Disassembly Flowchart

Disassembly and Assembly

EPSON Stylus COLOR 400 Service Manual

3.2.1 Removing the Housing

Since the printer mechanism also acts as the lower case, you can remove the printer mechanism just by

removing the housing.

1. Open the printer cover and turn the PG adjustment lever toward the (+) side.

2. Remove 4 screws (No. 2) securing the housing, and remove the housing.

Lift up and remove the housing, pulling it toward you (to keep it from hitting the carriage).

Housing

(No. 2)

Figure 3-2. Removing the Housing

Disassembly and Assembly

EPSON Stylus COLOR 400 Service Manual

3.2.2 Removing the Board Assemblies

Since the main board (C206 MAIN) and power supply board (C206 PSB) are built in a separate bracket from

the printer mechanism, remove the whole bracket from the printer mechanism.

1. Remove the housing. (See Section 3.2.2.)

2. Remove 5 screws (No. 1) securing the main board shield plate to the printer mechanism.

3. Pull the main board shield plate out slightly, and remove the cables hung on holders A and B, shown in

the figure below. Then, remove all cables from C206 MAIN board connectors (CN11 black, CN4 yellow,

CN5 white, CN3 black, and CN8 FFC)

4. After removing all cables from the C206 MAIN board, detach the main board shield plate completely

from the printer mechanism.

5. To remove the boards from the main board shield plate, remove all screws for each board. The C206

MAIN board has 10 screws — 7 (No. 1) and 3 (No. 6) screws. The C206 PSB/PSE board has 4 screws

(No. 1). See the figure on the next page. Also, when removing the power supply board (C206 PSB/PSE),

disconnect and remove cables connecting it to the main board (CN10 locking connector).

Since connectors CN6, CN7, and CN10 have connector locks, be sure to release the lock before

disconnecting the cable. Also, make sure to lock the lock when installing these cables.

When connecting cables, be careful not to insert them in the wrong connector. Use the color codes in

step 3 to identify the correct cable for the connector.

Cable Holder A and B

Main Board Shield Plate

(No. 1)

Figure 3-3. Removing the Main Board Shield Plate

Disassembly and Assembly

EPSON Stylus COLOR 400 Service Manual

Main Board Shield Plate

Power Supply Board

(C206 PSB)

Main Board

(C206 MAIN)

(No. 6)

(No. 1)

ure 3-4. Removin

the Boards

Disassembly and Assembly

EPSON Stylus COLOR 400 Service Manual

3.2.3 Removing the Control Panel

1. Remove the housing. (See Section 3.2.1)

2. Remove 2 screws (No. 1) securing the control panel, and disconnect the panel from the printer

mechanism.

3. Remove 1 screw (No. 1), and detach the left panel housing.

4. Remove 2 screws (No. 3) securing the panel board assembly and take C206 PNL board out of the panel

assembly.

5. Disconnect the FFC from the connector on the C206 PNL board.

Removing the control panel also separates the stacker assembly, because the control panel is attached

to the stacker assembly.

Stacker Assembly

Left Panel Housing

Panel Assembly

Panel Shield Plate

Panel Board Assembly

(No. 1)

(No. 3)

(No. 1)

Figure 3-5. Removing the Control Panel

Disassembly and Assembly

EPSON Stylus COLOR 400 Service Manual

-1

3.2.4 Disassembling the Printer Mechanism

Since the EPSON Stylus COLOR 400 does not have a lower housing, the printer mechanism is already

removed. Therefore, this section explains procedures for disassembling major parts or units of printer

mechanism.

3.2.4.1 Removing the Printhead Unit

1. Remove the housing. (See Section 3.2.1)

2. Rotate the flat gear (67.2 mm) toward yourself (front of printer), and release the carriage lock

mechanism. Then move the carriage to the left edge.

3. Take both black and color ink cartridges out of the printhead unit.

4. Remove the blue covers for black and color ink cartridges from the carriage assembly.

5. Remove the torsion spring (49 g) and 1 screw (No. 3), and take the head fastener out.

6. Remove the FFC being placed on the carriage assembly, and take the printhead unit out of the carriage.

7. Disconnect the FFC from the connector on the driver board built into the printhead unit.

Make sure the earth board is installed in the carriage correctly. (There are 2 location pins.)

When you put the printhead into the carriage, make sure the location pin on the carriage side is

placed in the notch in the printhead.

Since damage may occur once the ink cartridge is taken out, it cannot be used again. Be sure to

install a new ink cartridge when you return the printer to the user.

Pack the printer for transport with the new ink cartridge installed and the carriage in home position.

1. When you replace the printhead unit, perform the following adjustments. (See Chapter 4 for details):

1. Initial ink charge (See Chapter 4, Section 4.2.2.2.)

2. Write VH voltage ID (See Chapter 4, Section 4.2.2.3.)

3. Head angle adjustment (See Chapter 4, Section 4.2.2.4.)

CAUTION

REQUIRED ADJUSTMENT

Disassembly and Assembly

EPSON Stylus COLOR 400 Service Manual

-1

FFC

Head Fastener

Printhead Unit

Figure 3-6. Removing the Printhead

Printhead

Carriage Assembly

Make sure the protrusion from

the carriage is in the hole in

the earth ground plate.

This part should

touch the CR axis

holder.

Make sure this protrusion

is in the U-shaped groove

on the printhead side.

Figure 3-7. Installing the Printhead

Disassembly and Assembly

EPSON Stylus COLOR 400 Service Manual

-1

3.2.4.2 Removing Waste Ink Drain Pad Tray Assembly A

1. Remove the housing. (See Section 3.2.1.)

2. Remove the control panel. (See Section 3.2.3.)

3. Remove 1 screw (No. 4) securing the waste ink tray assembly on the right side of the printer mechanism.

4. Also on the right side of the printer mechanism, release the hook securing waste ink tray assembly A to

the frame and remove it, pulling it downward.

When installing waste ink tray assembly A, be sure to attach it with the spacer tray on the left side of

the printer mechanism.

WORK POINT

Spacer Tray

(No. 4)

Waste Ink Drain Pad Tray Assembly A

Figure 3-8. Removing Waste Ink Tray Assembly A

Disassembly and Assembly

EPSON Stylus COLOR 400 Service Manual

-1

3.2.4.3 Removing the Pump Assembly and Cap Assembly

1. Remove the housing. (See Section 3.2.1.)

2. Remove the control panel. (See Section 3.2.3.)

3. Remove waste ink drain pad tray assembly A. (See Section 3.2.4.2.)

4. Loosen 2 screws on the edges of the paper eject frame assembly, and float the paper eject assembly.

5. Raise the printer mechanism toward the ASF side, so you can see the bottom of the printer mechanism.

6. On the right side of the frame, remove the hook holding the cap assembly, and release 2 protrusions

attached to the frame. Lift up the right side of the cap assembly, and then take it out toward the bottom of

the printer mechanism. Remember that the cap assembly is still connected to the pump assembly by the

ink tube at this point. (See the figures on the next page.)

7. Remove 2 screws (No. 5) securing the pump assembly to the frame. (See the figures on the next page.)

8. Release the hook securing the pump assembly to the frame and remove the pump assembly, moving it

toward the right. (See the figures on the next page.)

Do not damage the rubber part (black square) of the cap installed in the cap assembly. (If this gets

damaged, it will not be able to adhere closely to the surface of the printhead and may cause a

malfunction in operation.)

When replacing the head cleaner built into the pump assembly, be careful of the following points:

• Do not touch the head cleaner with your bare hands. Use gloves or tweezers.

• Do not let oil or grease touch the head cleaner.

• When installing the head cleaner, insert the rubber side (darker black side) toward the right side of

the frame.

When installing the pump assembly, do not tighten the screw more than the necessary torque.

There is a spring among the gears in the pump assembly, so be careful that the parts do not pop out

during disassembly and assembly.

When assembling, be careful not to crush or stretch the ink tube connecting the pump assembly and

cap assembly.

After installing the pump assembly, make sure the cleaner parts can move forward and back by

rotating the gear (67.2 mm).

CAUTION

Disassembly and Assembly

EPSON Stylus COLOR 400 Service Manual

-1

Loosen screws on the right

and left sides and float the

paper eject frame assembly.

Release 3 hooks from

the interior of the

right frame assembly.

Pump Assembly

Cap Assembly

Release 1 hook from the back

of the printer mechanism and

remove 2 protrusions from

the subframe.

(No. 5)

Figure 3-9. Removing the Cap and Pump Assemblies

Head Cleaner

Pump Assembly Order.

Figure 3-10. Assembly of Pump Components

Disassembly and Assembly

EPSON Stylus COLOR 400 Service Manual

-1

3.2.4.4 Removing the CR Motor Assembly

1. Remove the housing. (See Section 3.2.1.)

2. Rotate the gear (67.2 mm) toward you, and release the carriage lock mechanism. Move the carriage to

the center.

3. Loosen the timing belt by pushing the driven pulley holder and remove the timing belt from the pulley on

the CR motor side.

4. Remove 2 screws (No. 1), and take out the CR motor assembly.

When installing the CR motor assembly, make sure the 2 protrusions from motor bracket are in the holes

for determining the position on the frame. (See the figure on the next page)

Driven Pulley Assembly

Timing Belt

Driven Pulley Holder

Compression Spring (19.6 g)

To Interior of Side Frame

To Exterior of Side Frame

Figure 3-11. Removing the Timing Belt

Disassembly and Assembly

EPSON Stylus COLOR 400 Service Manual

-1

(No. 1)

Make sure the protrusions from the CR motor are in the

holes in the frame when installing the CR motor assembly.

Figure 3-12. Removing and Installing the CR Motor Assembly

Disassembly and Assembly

EPSON Stylus COLOR 400 Service Manual

-1

3.2.4.5 Removing the PF Motor Assembly

1. Remove the housing. (See Section 3.2.1.)

2. Remove waste ink drain tray assembly A. (See Section 3.2.4.2.)

3. Remove the following gears on the left side of the printer mechanism. See the figure below.

Gear (67.2 mm).

Remove the ring with tweezers or a flathead screwdriver. After the ring is removed, if you try to

remove the gear (67.2 mm) by holding its edge, the gear may break. So, try to remove it while

holding the whole gear, pulling it slightly toward you.)

Combination gear (8.8 mm, 21.6 mm)

Combination gear (8 mm,14.4 mm)

Gear (36 mm)

4. Remove 3 hexagon nuts and take the PF motor assembly out.

When disassembling the PF motor assembly, pull the motor assembly out of the frame slightly and

remove it, sliding it into the larger hole in the frame. (See the figure on the next page.)

Be careful of the direction of wires from the PF motor assembly.

Do not damage or mar the grooves in the gears during disassembly and assembly.

C-Ring

PF Motor Assembly

Hexagon Nut

Compression Spring (0.9 g)

Gear (67.2 mm)

Combination Spring (8.8 mm, 21.6 mm)

Gear (36 mm)

Combination Gear

(8 mm, 14.4 mm)

Gear (34 mm)

Figure 3-13. Removing the PF Motor Assembly

Disassembly and Assembly

EPSON Stylus COLOR 400 Service Manual

-1

PF Motor

(Back side of the frame)

Direction to pull

motor cable lead

Insert the PF motor shaft into

the larger hole first, and then

slide it into the smaller hole.

Figure 3-14. Installing the PF Motor Assembly

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Epson Stylus Color 400 User manual

Epson Stylus Color 400 User manual

Epson Stylus Color 400 User manual

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