EPSON ET-3700 (03) PDF MANUAL

Strictly observe the following cautions. Failure to comply could result in serious bodily injury or loss of life:

1. Always disconnect the product from the power source and peripheral devices when servicing the product or performing maintenance.

2. When performing works described in this manual, do not connect to a power source until instructed to do so. Connecting to a power source causes high voltage in the power supply unit and some electronic components even if the product power switch is off. If you need to perform the work with the power cable connected to a power source, use extreme caution to avoid electrical shock.

Strictly observe the following cautions. Failure to comply may lead to personal injury or loss of life:

1. When using compressed air products; such as air duster, for cleaning during repair and maintenance, the use of such products containing flammable gas is prohibited.

Strictly observe the following cautions. Failure to comply may lead to personal injury or damage of the product:

1. Repairs on Epson product should be performed only by an Epson certified repair technician.

2. No work should be performed on this product by persons unfamiliar with basic safety knowledge required for electrician.

3. The power rating of this product is indicated on the serial number/rating plate. Never connect this product to the power source whose voltages is different from the rated voltage.

4. Replace malfunctioning components only with those components provided or approved by Epson; introduction of second-source ICs or other non-approved components may damage the product and void any applicable Epson warranty.

5. The capacitors on the Main Board may be electrically charged right after the power turns off or after driving motors which generates counter electromotive force such as when rotating the PF Roller or when moving the CR Unit. There is a risk to damage the Main Board if the FFC is short-circuited with the capacitors on the Main Board electrically charged, therefore, after the power turns off or after motors are driven, leave the printer untouched for approximately 30 seconds to discharge the capacitors before starting disassembly/reassembly.

To prevent the circuit boards from short-circuiting, be careful about the following when handling FFC or cables:

• When handling FFC, take care not to let the terminal section of FFC touch metal parts.

• When connecting cables/FFC to the connectors on circuit boards, connect them straight to the connectors to avoid slant insertion.

In order to protect sensitive microprocessors and circuitry, use static discharge equipment, such as anti-static wrist straps, when accessing internal components.

Never touch the ink or wasted ink with bare hands. If ink comes into contact with your skin, wash it off with soap and water immediately. If you have a skin irritation, consult a doctor immediately.

Be extremely careful not to scratch or contaminate the following parts:

• Nozzle plate of the printhead

• CR Scale

• PF Scale

• Coated surface of the PF Roller

• Gears

• Rollers

• LCD

• Scanner Sensor

• Exterior parts

Never use oil or grease other than those specified in this manual. Use of different types of oil or grease may damage the component or give bad influence on the printer function. Apply the specified amount of grease described in this manual.

When disassembling/reassembling this product, if you find adhesive power of the double-sided tape which secure the parts or FFC is not enough, replace the tape with new one and attach it correctly to the specified points where the parts or FFC should be secured.

Unless otherwise specified in this manual, the labels attached on the returned product should be transferred to the corresponding attachment positions on the new one referring to the labels on the returned product.

The µTFP1S head is used for ET-4750/ET-4760/L6190/ST-4000 series/ET-3750/ET-3760/L6170/ST-3000 series/ET-3700/ET-3710/L6160 series.

Table 1-1. Nozzle Configuration

The nozzle layout consists of Column A (Bk) and Column B (Y, M, C).

The F2 head is used for ET-2750/ET-2760/L4160/ST-2000 series/ET-2700/L4150 series.

Table 1-2. Nozzle Configuration

The nozzle layout consists of Column A (Bk) and Column B (Y, M, C).

The major components of the carriage (CR) mechanism are the CR Unit, CR Encoder Sensor, CR Scale, CR Motor, and CR Timing Belt. The CR mechanism is a key mechanism to ensure stable print quality because printing is performed by moving the CR Unit from side to side.

The Main Frame holds the upper and lower sides of the CR Unit. The CR Unit is attached to the CR Timing Belt, which is moved by the CR Motor, allowing the assembly to move side to side for printing. The position and speed of the CR Unit are constantly monitored by the CR Encoder Sensor and the CR Scale, and the CR Motor’s operation is controlled based on this information.

For ET-4750/ET-4760/L6190/ST-4000 series/ET-3750/ET-3760/L6170/ST-3000 series/ET-3700/ET-3710/L6160 series:

A sheet of paper is fed into the printer from the Paper Cassette by the Pick up Roller Assy. The transmission of drive force to this assembly is controlled by the Slider Trans and the Holder Cam Assy. When the CR Unit moves the Slider Trans, the engagement between its transmission gear and the Pick up Roller driving gear changes. This allows switching between transmitting the PF Motor driving force to the Pick up Roller Assy and not transmitting it. The position of the Slider Trans is maintained by the Holder Cam Assy even when the CR Unit moves away for printing.

The paper fed by the Pick up Roller Assy is then conveyed by the intermediate roller (inside the Duplex Unit), PF Roller, and EJ Roller, which are part of the paper feeding mechanism. The PF Motor drives both the loading and feeding mechanisms.

For ET-2750/ET-2760/L4160/ST-2000 series/ET-2700/L4150 series:

Paper is fed into the printer from the ASF Rear (Auto Sheet Feeder) by the LD Roller. The ASF Rear includes a Hopper, Paper Back Lever, Change Lever, LD Roller, and clutch. The Change Lever and clutch control the transmission of driving force from the PF Motor to the LD Roller. The Hopper and Paper Back Lever, driven by a cam on the LD Roller Shaft, prevent multi-feeding and ensure accurate paper loading.

Paper fed by the ASF Rear is conveyed by the PF Roller and the EJ Roller. The intermediate roller (inside the Duplex Unit) is used only for flipping paper during duplex printing.

The PF Motor drives both the loading and feeding mechanisms.

The ink system mechanism uses slide-type capping. Its major components are a cap, pump unit, and waste ink tube. When the CR Unit returns to its home (capping) position, the Print Head is capped.

The pump mechanism, wiper mechanism, and CR Lock mechanism are driven by the PF Motor to clean the Print Head. During cleaning, waste ink is sucked by the pump mechanism and collected via the waste ink tube.

ET-4750/ET-4760/L6190/ST-4000 series/ET-3750/ET-3760/L6170/ST-3000 series/ET-3700/ET-3710/L6160 series: These models use a user-replaceable Maintenance Box (Porous Pad Assy). A CSIC chip on the Maintenance Box tracks the amount of waste ink collected.

ET-2750/ET-2760/L4160/ST-2000 series/ET-2700/L4150 series: These models have a Porous Pad that cannot be replaced by the user. The EEPROM on the Main Board tracks the amount of waste ink collected.

Table 1-3. Motor and Sensor List (ET-4750/ET-4760/L6190/ST-4000 series/ET-3750/ET-3760/L6170/ST-3000 series/ET-3700/ET-3710/L6160 series)

Table 1-4. Motor and Sensor List (ET-2750/ET-2760/L4160/ST-2000 series/ET-2700/L4150 series)

The scanner mechanism consists of a CIS (Contact Image Sensor) sensor that scans documents and the SCN motor that drives the scanner carriage. The CIS sensor and the SCN motor are integrated as the scanner carriage. This carriage moves along the rail on the scanner housing to scan documents placed on the platen glass.

This mechanism applies to ET-4750/ET-4760/L6190/ST-4000 series/ET-3750/ET-3760/L6170/ST-3000 series only.

The PF Roller, EJ Roller, and Pick up Roller of the ADF (Automatic Document Feeder) mechanism are driven by the SCN Motor. The drive force is transmitted through transmission gears. This ADF mechanism feeds documents for scanning but does not support automatic duplex scanning.

Presence or absence of a document on the ADF is detected by the ADF Document Lever and the scanner CIS Sensor. The lever moves up or down depending on the presence or absence of a document. The end of the lever is scanned by the CIS Sensor. Based on the scan result, the printer determines whether a document is present or not.

There is a Sub Document Lever beside the ADF Document Lever. If the CIS Sensor cannot scan the end of the Sub Document Lever, the printer determines that the scanner (SCN) unit is open or the CIS Sensor is malfunctioning.

Front paper loading:

ET-4750/ET-4760/L6190/ST-4000 series/ET-3750/ET-3760/L6170/ST-3000 series/ET-3700/ET-3710/L6160 series

Rear paper loading:

ET-2750/ET-2760/L4160/ST-2000 series/ET-2700/L4150 series

Table 1-5. Paper Loading Method and Drive Force

Paper loaded into the cassette is fed to the intermediate roller by the Pick up Roller Assy. It then arrives at the PE Sensor position. Next, skew is corrected, and printing is performed while the paper is fed by the PF Roller and EJ Roller/Star Wheel Holder Assy. Finally, the paper is ejected to the Stacker.

Paper put on the Hopper is fed by the LD Roller and arrives at the PE Sensor position. Next, skew is corrected, and printing is performed while the paper is being fed by the PF roller and EJ Roller/Star Wheel Holder Assy. Then, the paper is ejected to the Stacker.

After printing on one side is finished, the printer waits for the ink to dry, keeping the paper nipped between the PF Roller and Driven Roller. After a predetermined drying time, the PF Roller and EJ Roller rotate in the reverse direction, pulling the paper inside the auto duplex unit. When the leading edge of the paper is detected by the PE Sensor, skew is corrected, and then printing on the back side is performed.

The drive force of the PF Motor is transmitted to the PF Roller and EJ Roller through the compound gear PF1 and the spur gear PF1/PF2. From the PF Roller, the drive is then transmitted to other paper feed mechanisms, including the duplex unit system and the Pick up Roller Assy system.

The drive originates from the PF Roller (Spur Gear 9), goes through Compound Gear 28.8-14.4, then Spur Gear 22.8 to the Sun Gear of the one-way clutch. The one-way clutch ensures the Intermediate Roller always rotates in the paper feed direction, regardless of the PF Roller’s rotational direction. The clutch consists of a sun gear, two external gears (A & B), and planetary gears (x5 each) inside the external gears. When the sun gear rotates, one external gear idles while the other engages with the planetary gears, causing rotation. Which external gear rotates depends on the sun gear’s direction. The drive is then transmitted through Spur Gear 17.28 and Spur Gear 16/Spur Gear Duplex to the Intermediate Roller.

The drive originates from the PF Roller (Spur Gear 9) and goes through Compound Gear 28.8-14.4. Transmission to the Pick Up Roller Assy is controlled by the Slider Trans. When paper needs to be fed, the Slider Trans (pulled by a spring) engages Spur Gear 17.6 with the Pick Up drive shaft (Spur Gear 16B) via a one-way clutch. This allows the PF Motor to drive the Pick Up Roller Assy.

To stop feeding, the CR Unit pushes the Slider Trans (via the Change Lever mechanism, though not explicitly named here for front loading) to disengage the drive. Since the CR Unit moves for printing, the disengaged state is maintained by the Holder Cam Assy. The one-way clutch ensures the Pick Up Roller only rotates in the paper feed direction.

Similar to front loading models, the drive force of the PF Motor is transmitted to the PF Roller and EJ Roller through the compound gear PF1 and the spur gear PF1/PF2. From the PF Roller, the drive is then transmitted to other paper feed mechanisms, including the duplex unit system and the ASF Rear system (LD Roller).

The drive originates from the PF Roller (Spur Gear PF), goes through Compound Gear 27.2-22.2, then Compound Gear 38.4-15.6 to the Sun Gear of the one-way clutch. The one-way clutch ensures the Intermediate Roller always rotates in the paper feed direction, regardless of the PF Roller’s rotational direction. The clutch mechanism (sun gear, external gears, planetary gears) operates similarly to the front-loading models. The drive is then transmitted through Spur Gear 21.6 and Spur Gear 16/Spur Gear Duplex to the Intermediate Roller.

The drive force from the PF Motor is transmitted to the LD Roller via the PF Roller (Spur Gear PF), Change Lever (Compound Gear 27.2-22.2), and the clutch (linked to Compound Gear 38.4-15.6). Transmission is controlled by the Change Lever and the clutch so the LD Roller only rotates when loading paper. The Hopper and Paper Back Lever are driven by cams (Cam A, Cam B) linked to the LD Roller.

The relationship between PF Motor rotation and LD Roller motion is:

Drive force control by Change Lever and clutch:

• When the Change Lever holds the pawl of the clutch (ASF lock state), the clutch is disengaged, and no drive force from the PF Motor is transmitted to the LD Roller.

• When the Change Lever releases the pawl of the clutch (ASF unlock/ASF drive state), the clutch engages, and drive force is transmitted to the LD Roller.

Normal operation (CR Unit at home):

• The CR Unit in the home position prevents the Change Lever from moving freely. This keeps the ASF in the lock state, regardless of PF Motor rotation direction, shutting off drive force to the LD Roller.

Operation at paper loading:

• When loading starts, the CR Unit moves away from home, and the PF Motor rotates CCW (opposite paper feed). This allows the Change Lever to move, unlocking the ASF.

• The clutch engages, transmitting drive force to the LD Roller.

• The PF Motor then rotates CW (paper feed direction). The LD Roller rotates, feeding paper. The LD Roller and Retard Roller separate one sheet.

• During this CW rotation, the Change Lever returns to its original position.

• After the LD Roller rotates once, the Change Lever holds the pawl, locking the ASF again, shutting off drive force. Paper loading ends.

This product employs a sliding type capping mechanism. It consists of:

• CR Lock mechanism

• Wiper mechanism

• Capping mechanism (cap slider)

• Pump mechanism

All these mechanisms are driven by the PF Motor. The drive force is transmitted via parts like the pump-drive compound gear, clutch gear, and cam.

Various cleaning types are performed to prevent or clear nozzle clogging caused by air bubbles or dried ink.

Table 1-6. Print Head cleanings

*1: Timer cleaning intervals are becoming longer in newer printers due to improved materials and ink supply nozzle shapes.

*2: Manual cleaning typically performs CL1 → CL2 → CL3 sequentially, but the order might change based on conditions like remaining ink or maintenance counter status.

*3: “Main suction”: Sucks ink from cartridges to the Print Head, removing air bubbles and thick ink.

*4: “Wiping”: Removes ink from the nozzle surface.

*5: “Cap suction”: Sucks ink out of the cap.

*6: “Small amount suction”: Ejects tiny air bubbles from the Print Head using less ink than main suction.

*7: Some models might use a choke valve mechanism.

Ink used during cleaning (waste ink) is absorbed by the waste ink pad (Maintenance Box or internal Porous Pad). To prevent overflow and leakage, the printer firmware uses a counter to track the waste ink amount, considering evaporation.

• For models with a Maintenance Box (ET-4750/ET-4760/L6190/ST-4000 series, etc.), the count value is stored on the Maintenance Box CSIC.

• For models with an internal Porous Pad (ET-2750/ET-2760/L4160/ST-2000 series, etc.), the count value is stored in the Main Board EEPROM.

Waste ink from borderless printing (where the image slightly extends past the paper edge) is absorbed by porous pads located on the Paper Guide Front and the rear side of the printer. Some printers also have a counter for this type of waste ink.

If any waste ink counter reaches its limit, a maintenance error occurs, requiring replacement of the Maintenance Box or internal waste ink pad(s) and resetting the corresponding counter.

The ink system mechanism is driven by the PF Motor.

• Pump mechanism: Drive force is constantly transmitted via the PF Roller, a compound gear (specific to model: 28.8-14.4 for front loading, 27.2-22.2 for rear loading), and the Pump driving gear.

• Wiper mechanism & CR Lock mechanism: Drive force is transmitted via the PF Roller, spur gear PF, a compound gear equipped with a clutch, and a cam. The clutch engages or disengages based on the movement of the cap slider and cam, interrupting the drive force once the wiper or CR lock movement is complete.

Table 1-7. PF motor rotational direction and operation of the ink system

*1: Rotational direction seen from output shaft

The drive force from the pump-drive compound gear is transmitted to the pump shaft. When the PF Motor rotates counter-clockwise (CCW, seen from output shaft), the drive force rotates the pump pulley via the pump cam. This rotation flattens the pump tube, sucking air and creating negative pressure inside the tube connected to the cap, which draws ink from the print head.

When the PF Motor rotates clockwise (CW), the pump pulley does not flatten the tube, and the negative pressure is released.

This mechanism uses a cap slider.

• When the CR Unit returns to its home position (0 digit side), it pushes the cap slider, causing it to move upward and cap (seal) the Print Head.

• When the CR Unit moves away from the home position, the cap slider moves downward, uncapping the Print Head and releasing any vacuum.

The movement of the cap slider driven by the CR Unit provides the function of capping and vacuum release.

The wiper movement is driven by the PF motor via a compound gear set equipped with a cam and clutch, synchronized with the capping operation.

• Carriage away from home (Cap slider down – Clutch throw-out): The cap slider salient secures the cam (in groove 1). The compound gear clutch is disengaged, and PF motor drive is not transmitted to the cam. The wiper remains down.

• Carriage moving to home (Cap slider lifts – Clutch engaged): As the cap slider moves up, its salient comes off the cam groove. The clutch engages, allowing the PF motor drive to rotate the cam.

• PF motor rotates CW (moves wiper up): The cam rotates CW, lifting the wiper mechanism to the wiping position.

• PF motor rotates CCW (moves wiper down): The cam rotates CCW, lowering the wiper mechanism. Even when the cap slider goes down as the carriage moves away, the salient does not lock into cam groove 2 immediately; it only engages to lock the cam when the wiper is fully down.

The CR Lock operates in synchronization with the cap unit, using the PF motor drive transmitted through the cam of the compound gear set (the same one used for the wiper).

• The cam can only move to lock or unlock the CR when the cap slider is in the ‘up’ position (i.e., when the print head is capped or being capped/uncapped).

• When the PF motor rotates CCW (during capping/suction), the cam moves to engage the lock, securing the CR Unit.

• When the PF motor rotates CW (during cap release), the cam moves to disengage the lock, releasing the CR Unit.

The troubleshooting workflow is based on:

• Experience regarding quality problems.

• ESK’s repair data.

• Printer Mechanism specifications.

General steps:

• If the reason for the return is evident, first verify that the user’s claimed phenomenon recurs, then proceed with troubleshooting.

• If a Scanner (SCN) error is the reason for return, check the Fatal Error Code history saved in the EEPROM using the adjustment program before starting troubleshooting, as the printer mechanism might be the cause.

Refer to specific workflows based on when the error occurs:

• Workflow when the Power is ON (Printer)

• Workflow for Scanner Errors when the Power is ON

• Workflow for Errors when Printing Starts

Error 031006: Indicates a blowout of a fuse on the Main Board.

• Check for disconnection, breakage, slant connection, or contact damage of the Head FFC.

• Check if the print head is broken.

• Replace the Main Board.

Error 031004: Indicates an abnormality of the Head Thermistor.

• Check for disconnection, breakage, slant connection, or contact damage of the Head FFC.

• Check if the print head is broken.

• Replace the Main Board.

This error during power-on (before mechanism operation starts) typically indicates an issue with the PE Sensor detecting paper when none should be present.

• Check if the PE Sensor is broken.

• Check if the PE Sensor cable/FFC is disconnected, broken, or connected at an angle.

• Check the PE Sensor adjustment value (if applicable/possible).

• Replace the Main Board.

This error indicates the waste ink counter has reached its limit.

• If the error message indicates the Maintenance Box is at the end of its service life (models ET-4750/ET-4760/L6190/ST-4000 series, etc.), replace the Maintenance Box.

• If the error message indicates the printer’s ink pad is at the end of its service life (models ET-2750/ET-2760/L4160/ST-2000 series, etc., or borderless pad counter), the main or borderless waste ink pad needs replacement, and the counter must be reset using the appropriate service tools.

These errors indicate a problem with the Paper Feed (PF) motor operation.

Possible Causes:

• PF Motor did not rotate (Error Code: 000041): Disconnection of the PF Motor Connector; load is too large for the paper feed mechanism.

• PF Motor rotated too fast (Error Code: 000041): Problem with PF Encoder FFC or PF Encoder.

• PF Motor rotated incorrectly/stalled (Error Code: 000043): Problem with PF Encoder FFC, PF Encoder, or PF Motor itself; excessive mechanical load.

Solutions:

1. Check the PF Motor Connector connection.

2. Check for any obstructions or excessive load in the paper feed path/mechanism.

3. Replace the PF Encoder FFC.

4. Replace the PF Encoder.

5. Replace the PF Motor.

6. Replace the Main Board.

These errors indicate a problem with the Carriage (CR) system.

Error 000025 (CR did not function):

• If first power-on, remove any securing tape.

• Check if CR Lock is released (if not, check PF Motor/Ink system).

• Check CR mechanical load manually; check Ink system.

• Check CR Motor cable connection.

• Replace CR Motor.

• Replace Main Board.

Error 000023 (Stops with noises):

Error 000031 (CR error):

• Check for obstacles in the CR motion range.

• Check CR Lock and Ink System for problems.

• Check if the CR Timing Belt is loose.

• Clean or replace the CR Encoder Scale.

• Replace the Main Board.

This typically happens after the CR unit starts moving. The PE Sensor detects paper when it shouldn’t (e.g., during CR reciprocation).

• Check if any obstacle exists in the Paper Path. Remove it if found.

• Check the PE Sensor FFC for disconnection or breakage. Replace the FFC if necessary.

• Replace the PE Sensor.

• Replace the Main Board.

Note: This error might occur if the PF Motor rotates for longer than usual before the error appears.

If a Paper Jam error or a Fatal CR system error (e.g., CR error message with code) occurs after the initial CR movements during power-on:

• Check if there is any obstacle in the CR motion range.

• Manually move the CR unit to check if it gets stuck anywhere.

• Check if any heavy load exists in the CR motion range (e.g., due to ink system issues, binding).

• Perform the corresponding repair based on the findings (e.g., remove obstacle, fix binding issue).

This message appears during the Ink System operation check in the power-on sequence if ink levels are low.

• Physically check the ink tanks and refill any low tanks up to the upper line.

• Follow the on-screen prompts to select the color(s) that were refilled to reset the ink level counter for those colors.

This error indicates the Wireless LAN Board is broken or malfunctioning.

• Check the connection of the Wireless LAN Board FFC/cable.

• Replace the Wireless LAN Board.

This error indicates the Card Slot Board is broken or malfunctioning.

• Check the state (connection, damage) of the Card Slot Board FFC.

• Replace the Card Slot Board.

This error means the SCN CR (scanner carriage) cannot move to the home position or cannot read the patterns needed for positioning.

Possible Causes:

• SCN CR cannot move to the home position because the load is too large.

• CIS is broken (cannot read the white standard pattern and home position pattern).

Troubleshooting Steps:

1. Turn the power on with the Document Cover opened.

2. Check if the CIS moves to the left to read the white standard/home patterns.

3. Check if the emission color of the CIS is white (not greenish, reddish, or bluish). If not white, check the SCN FFC for damage, disconnection, or skew.

4. Replace the SCN Unit with a new one.

5. Replace the Main Board with a new one.

This error means the scanner carriage did not properly complete contact detection to the right side.

Possible Causes:

• Wheel Train of the Drive Mechanism is detached or broken.

• SCN Motor Wheel Train is detached or broken.

Troubleshooting Steps:

1. Turn the power on with the Document Cover opened.

2. Check if the SCN CR reaches (comes in contact with) the right side.

3. Check the Wheel Train of the Drive Mechanism for damage.

4. Check the SCN FFC for damage, disconnection, or skew.

5. Replace the SCN Unit with a new one.

6. Replace the Main Board with a new one.

This error indicates a problem with the scanner’s LED illumination.

Possible Causes:

• SCN FFC disconnection, breakage, slant connection, or damaged contact (CN409).

• CIS is broken.

Troubleshooting Steps:

1. Check the color of the LED at power-on (should light greenish-white during pattern reading).

2. Check the scanner FFC for damage, disconnection, or skew.

3. Replace the SCN Unit with a new one.

4. Replace the Main Board with a new one.

This error typically indicates a network problem has occurred.

• Check the Wi-Fi/network connection status.

• Consult the user documentation for network troubleshooting.

This does not usually indicate a hardware failure requiring repair at the service site. The user needs to resolve their network connection issues.

This error (relevant for subscription models like ET-4750U/ET-2750U) indicates a communication error occurred with the subscription server.

• This does not indicate a hardware failure.

• The user should find the solution on their subscription portal site or contact the call center for assistance with their subscription service communication.

These errors (relevant for subscription models like ET-4750U/ET-2750U) indicate specific issues reported by the subscription service:

• 950141 (Opt-Out): Received Opt-out command from the subscription server.

• 950142 (Halting): Received halt command from the subscription server.

• 950143 (Unregistered): Received unregistered status from the subscription server.

• 950144 (Starting up): Error during communication with the subscription server at startup.

Resolution:

• These do not indicate hardware failures.

• The user needs to find the solution on their subscription portal site or contact the call center for assistance with their subscription account status or service communication.

This error indicates the printer could not detect the leading edge of the paper with the PE Sensor.

Paper Out (1) – From Cassette/Rear Tray (general):

• Refill paper into the Paper Cassette (and set it back fully) or the Rear Tray.

• Check PE Sensor/PW Sensor FFC for disconnection, breakage, slant connection, or damaged contact (CN402/CN303).

• Replace the PE Sensor/PW Sensor.

• Replace the Main Board.

Paper Out (2) – From Rear Tray (specific message):

• Refill paper into the Rear Tray and set the Paper Guide back in place fully.

• Check PE Sensor/PW Sensor FFC for disconnection, breakage, slant connection, or damaged contact (CN402/CN303).

• Replace the PE Sensor/PW Sensor.

• Replace the Main Board.

Paper Jam (1) – Occurred in the path until the PE Sensor:

• Remove any foreign objects or jammed paper from the feed path.

• Check PE Sensor/PW Sensor FFC for disconnection, breakage, slant connection, or damaged contact (CN402/CN303).

• Replace the PE Sensor/PW Sensor.

• If a CR system Fatal Error also occurred, troubleshoot and repair the CR system first.

• Replace the Main Board.

Paper Jam (2) / (3) – Occurred while reversing paper or during backside ejection in duplex printing:

• Remove any foreign objects or jammed paper from the duplex path.

• Replace the Duplex Unit.

These errors relate to the print head’s temperature sensor (thermistor) readings.

• 031004 (Head temperature error): General thermistor abnormality.

• 031001 (Head Hot error – before printing): Head detected as too hot before starting a print job.

• 031002 (Head Hot error – after flushing): Head detected as too hot after a flushing operation.

Note: Head Hot errors might occur if foreign objects partially cover the Head FFC contacts, causing incorrect signal readings.

Troubleshooting Steps:

1. Check the Head FFC connection state (CN301) for damage, disconnection, or contamination.

2. Replace the Print Head.

3. Replace the Main Board.

The typical power-on sequence under normal conditions (no prior errors, head capped, CR locked, sufficient ink) is as follows:

Table 2-1. Normal Power-on Sequence

Notes:

*1: PF Motor rotation: Clockwise = Paper fed normally; Counterclockwise = Paper fed backward.

*2: CR Lock status indicated by color: Red = Lock set; White = Lock released.

*3: A fatal error occurs if a problem like a blown fuse is detected.

*4: Executed if the detected temperature is under 5 °C (41°F) by the print head thermistor.

When a fatal error occurs, the product displays the fatal error code automatically on the panel LCD. The code appears as a number (e.g., 000021) within the error message screen. This code is also stored in the EEPROM on the Main Board and can be read using the Adjustment Program.

Possible Causes:

• Failed to read the SCN motor encoder:

1. Contamination of the SCN encoder scale.

2. Damage or skew of the SCN encoder FFC.

3. Failure of the SCN encoder sensor.

• Failure of the SCN motor driver.

• Failure of the Main Board.

Confirmation Procedure:

1. Clean the SCN encoder scale if it is contaminated.

2. Check the cable/FFC of the SCN motor/encoder (Connector: Main Board CN410).

3. Replace the SCN Unit with a new one.

4. Replace the Main Board with a new one.

Possible Causes:

• Paper feed fails, stopped by obstacles:

1. Obstacles (jammed paper), overload of paper feed mechanism, disengaging/broken gear teeth.

• Failed to read the SCN motor encoder:

2. Jumping of the SCN drive gear wheel train.

3. Contamination of the SCN encoder scale.

4. Damage or skew of the SCN encoder FFC.

5. Failure of the SCN encoder sensor.

• Failure of the Main Board.

Confirmation Procedure:

1. Check for paper pieces or foreign objects in the paper path.

2. Check the load of the ADF paper feed mechanism.

3. Check the ADF/SCN drive gear wheel train.

4. Clean the SCN encoder scale if it is contaminated.

5. Check the cable/FFC of the SCN motor/encoder (Connector: Main Board CN410).

6. Replace the SCN Unit with a new one.

7. Replace the Main Board with a new one.

Possible Causes:

• The ADF paper feed did not run or obstacles exist:

1. Overload of the paper feed mechanism.

2. The paper feed mechanism is disengaged or its tooth is broken.

• Failed to read the SCN motor encoder:

3. Contamination of the SCN encoder scale.

4. Disconnection, break, skew or damage of the SCN encoder FFC.

5. Failure of the SCN encoder sensor.

• Failure of the SCN motor (lead wire broken or connector disconnected).

• Failure of the Main Board.

Confirmation Procedure:

1. Check that no jammed paper exists in the paper path.

2. Check the load of the ADF paper feed mechanism.

3. Check the ADF/SCN drive gear wheel train.

4. Clean the SCN encoder scale if it is contaminated.

5. Check the cable/FFC of the SCN motor/encoder (Connector: Main Board CN410).

6. Replace the SCN Unit with a new one.

7. Replace the Main Board with a new one.

Possible Causes:

• The SCN motor stopped running mid-operation:

1. ADF stopped by obstacles (jammed paper), overload, disengaged/broken gears.

• Failed to read the SCN motor encoder:

2. Jumping of SCN drive gear wheel train.

3. Contamination of SCN encoder scale.

4. Disconnection, break, skew, or damage of SCN motor cable/encoder FFC.

• Failure of the SCN motor (not completely broken).

• Failure of the Main Board.

Confirmation Procedure:

1. Check for paper pieces or foreign objects in the paper path.

2. Check the load of the ADF paper feed mechanism.

3. Check the ADF/SCN drive gear wheel train.

4. Check the SCN encoder scale for damage or contamination.

5. Check the cable/FFC of the SCN motor/encoder (Connector: Main Board CN410).

6. Replace the SCN Unit with a new one.

7. Replace the Main Board with a new one.

Possible Cause:

• Malfunction or crash of the firmware.

Confirmation Procedure:

1. Turn the printer off and back it on.

2. If the error still occurs after the restart, replace the Main Board.

Possible Causes:

• Failed to read the SCN motor encoder:

1. Contamination of the SCN encoder scale.

2. Damage or skew of the SCN encoder FFC.

3. Failure of the SCN encoder sensor.

• Failure of the SCN motor driver.

• Failure of the Main Board.

Confirmation Procedure:

1. Clean the SCN encoder scale if it is contaminated.

2. Check the cable/FFC of the SCN motor/encoder (Connector: Main Board CN410).

3. Replace the SCN Unit with a new one.

4. Replace the Main Board with a new one.

Possible Causes:

• Paper feed fails, stopped by obstacles:

1. Obstacles (jammed paper), overload of paper feed mechanism, disengaging/broken gear teeth.

• Failed to read the SCN motor encoder:

2. Jumping of the SCN drive gear wheel train.

3. Contamination of the SCN encoder scale.

4. Damage or skew of the SCN encoder FFC.

5. Failure of the SCN encoder sensor.

• Failure of the Main Board.

Confirmation Procedure:

1. Check for paper pieces or foreign objects in the paper path.

2. Check the load of the ADF paper feed mechanism.

3. Check the ADF/SCN drive gear wheel train.

4. Clean the SCN encoder scale if it is contaminated.

5. Check the cable/FFC of the SCN motor/encoder (Connector: Main Board CN410).

6. Replace the ADF Unit with a new one.

7. Replace the SCN Unit with a new one.

8. Replace the Main Board with a new one.

Possible Causes:

The SCN motor did not run:

1. The SCN was stopped by:

– Obstacles such as jammed paper

– Overload of the mechanism

– Disengaging or breakage of the gears

Failed to read the SCN encoder:

2. Contamination of the SCN encoder scale

3. Disconnection, break, skew or damage of the SCN motor cable/encoder FFC

4. Failure of the SCN encoder sensor

5. Failure of the SCN motor (the lead wire is broken or the connector is disconnected)

6. Failure of the Main Board (Connector: CN410)

Confirmation Procedure:

1. Check that no pieces of paper or foreign objects exist in the paper path.

2. Check the ADF/SCN drive gear wheel train.

3. Clean the SCN encoder scale if it is contaminated.

4. Check the cable/FFC of the SCN motor/encoder.

5. Replace the ADF Unit with a new one.

6. Replace the SCN Unit with a new one.

7. Replace the Main Board with a new one.

Possible Causes:

The SCN motor stopped running in the middle of the operation:

1. The SCN was stopped by:

– Obstacles such as jammed paper

– Overload of the paper feed mechanism

– Disengaging or breakage of the gears

Failed to read the SCN motor encoder:

2. Jumping of the SCN drive gear wheel train

3. Contamination of the SCN encoder scale

4. Failure of the SCN motor (not completely broken)

5. Failure of the Main Board (Connector: CN410)

Confirmation Procedure:

1. Check that no pieces of paper or foreign objects exist in the paper path.

2. Check the load of the ADF paper feed mechanism.

3. Check the ADF/SCN drive gear wheel train.

4. Clean the SCN encoder scale if it is contaminated.

5. Replace the ADF Unit with a new one.

6. Replace the SCN Unit with a new one.

7. Replace the Main Board with a new one.

Possible Cause:

Malfunction or crash of the firmware

Confirmation Procedure:

1. Turn the printer off and back it on.

2. If the error still occurs after the restart, replace the Main Board.

Possible Causes:

The SCN CR could not return to its home:

1. Damage or disengaging of Wheel Train of the Drive Mechanism

2. Disengaging, fraying, jumping of the Timing Belt

Failed to read the white standard/home patterns:

3. Disconnection, break, skew or damage of the SCN FFC

4. Failure of the CIS Unit

5. Failure of the SCN Housing

6. Failure of the Main Board (Connectors: CN409, CN410)

Confirmation Procedure:

1. Turn the power on with the ADF Unit or the Document Cover opened.

2. Check if the CIS moves to the left to read the white standard/home patterns.

3. Check if the emission color of the CIS is white (not greenish, reddish, or bluish). If the light does not look like white, check the SCN FFC for damage, disconnection or skew.

4. Replace the SCN Unit with a new one.

5. Replace the Main Board with a new one.

Possible Causes:

The SCN CR cannot completely reach the home (right side):

1. Damage or disengaging of Wheel Train of the Drive Mechanism

Failure of SCN Encoder reading:

2. Damage or skew of the SCN FFC

3. Failure of the CIS Unit

4. Failure of the SCN Housing

5. Failure of the Main Board (Connectors: CN409, CN410)

Confirmation Procedure:

1. Turn the power on with the ADF Unit or the Document Cover opened.

2. Check if the CIS (SCN CR) reaches (comes in contact with) the right side.

3. Check the Wheel Train of the Drive Mechanism for damage.

4. Check the SCN FFC for damage, disconnection or skew.

5. Replace the SCN Unit with a new one.

6. Replace the Main Board with a new one.

Possible Causes:

Overload of the SCN Drive Mechanism

Failure of the SCN Motor

Confirmation Procedure:

1. Check if the CIS (SCN CR) moves or not.

1-1. Check the Wheel Train of the Drive Mechanism for damage.

2. Replace the SCN Unit with a new one.

3. Replace the Main Board with a new one.

Possible Causes:

Failure of the CIS LED light (RGB):

1. Disconnection, break, skew or damage of the scanner FFC

2. Failure of the CIS unit

3. Failure of the Main Board (Connector: CN409)

Confirmation Procedure:

1. Check the color of the LED at power-on.

2. Check the scanner FFC for damage, disconnection or skew.

3. Replace the SCN Unit with a new one.

4. Replace the Main Board with a new one.

Possible Causes:

No jammed paper is remaining but the sensor does not turn off:

1. Failure of the ADF PE sensor

2. Failure of the cable

Jammed paper is remaining:

The paper feed rollers and paper conveying rollers slip too much

At power-on, during paper feed, during scanning

(Connector: CN410)

Confirmation Procedure:

1. Open the PGU LD ADF Assy and check if paper exist or not.

2. Open the Document Support ADF and check if paper exist or not.

3. Open the ADF and check if paper exist or not.

4. Check if the paper sensor lever moves up and down.

5. Replace the ADF unit with a new one.

6. Replace the SCN Unit with a new one.

7. Replace the Main Board with a new one.

Possible Causes:

Failed to read the scanner encoder:

1. Contamination of the scanner encoder scale

2. Damage or skew of the scanner FFC

3. Failure of the scanner encoder sensor

Failure of the scanner motor driver:

4. Failure of the Main Board (Connectors: CN409, CN410)

Confirmation Procedure:

1. Check the scanner FFC for damage, disconnection or skew.

2. Replace the SCN Unit with a new one.

3. Replace the Main Board with a new one.

Possible Causes:

Operation failure of the SCN Motor:

1. Malfunction of the SCN

– Disengaging of the SCN CR

– Disengaging of the SCN Motor Pulley or cracking of the SCN Motor Gears

Failure of SCN Encoder reading:

2. Contamination of the SCN Encoder

3. Damage or skew of the SCN FFC

4. Failure of the SCN Encoder Sensor

5. Failure of the Main Board (Connectors: CN409, CN410)

Confirmation Procedure:

1. Check the scanner FFC for damage, disconnection or skew.

2. Replace the SCN Unit with a new one.

3. Replace the Main Board with a new one.

Possible Causes:

The scanner motor did not run:

1. The scanning operation was stopped by;

– Disengaging of the scanner CR

– Disengaging of the scanner motor pulley or cracking of the scanner motor gears

Failed to read the CR motor encoder:

2. Contamination of the scanner encoder

3. Damage or skew of the scanner FFC

4. Failure of the scanner encoder sensor

5. Failure of the scanner motor

6. Failure of the Main Board (Connectors: CN409, CN410)

Confirmation Procedure:

1. Check the scanner FFC for damage, disconnection or skew.

2. Replace the SCN Unit with a new one.

3. Replace the Main Board with a new one.

Possible Causes:

The scanner motor stopped running in the middle of the operation:

1. The scanning operation was stopped by;

– Disengaging of the scanner CR

– Disengaging of the scanner motor pulley or cracking of the scanner motor gears

Failed to read the scanner motor encoder:

2. Contamination of the scanner encoder

3. Disconnection, break, skew or damage of the scanner FFC

4. Failure of the scanner encoder sensor

5. Failure of the scanner motor (not completely broken).

6. Failure of the Main Board (Connectors: CN409, CN410)

Confirmation Procedure:

1. Check the scanner FFC for damage, disconnection or skew.

2. Replace the SCN Unit with a new one.

3. Replace the Main Board with a new one.

Possible Cause:

Malfunction or crash of the firmware

Confirmation Procedure:

1. Turn the printer off and back it on.

2. If the error still occurs after the restart, replace the Main Board.

Possible Causes:

Failed to read the scanner encoder:

1. Contamination of the scanner encoder scale

2. Damage or skew of the scanner FFC

3. Failure of the scanner encoder sensor

Failure of the scanner motor driver:

4. Failure of the Main Board (Connectors: CN409, CN410)

Confirmation Procedure:

1. Check the scanner FFC for damage, disconnection or skew.

2. Replace the SCN Unit with a new one.

3. Replace the Main Board with a new one.

Possible Causes:

Operation failure of the scanner motor:

1. The scanning operation was stopped by;

– Disengaging of the scanner CR

– Disengaging of the scanner motor pulley or cracking of the scanner motor gears

Failed to read the scanner encoder:

2. Contamination of the scanner encoder

3. Damage or skew of the scanner FFC

4. Failure of the scanner encoder sensor

5. Failure of the Main Board (Connectors: CN409, CN410)

Confirmation Procedure:

1. Check the scanner FFC for damage, disconnection or skew.

2. Replace the SCN Unit with a new one.

3. Replace the Main Board with a new one.

Possible Causes:

The scanner motor did not run:

1. The scanning operation was stopped by;

– Disengaging of the scanner CR

– Disengaging of the scanner motor pulley or cracking of the scanner motor gears

Failed to read the CR motor encoder:

2. Contamination of the scanner encoder

3. Damage or skew of the scanner FFC

4. Failure of the scanner encoder sensor

5. Failure of the scanner motor

6. Failure of the Main Board (Connectors: CN409, CN410)

Confirmation Procedure:

1. Check the scanner FFC for damage, disconnection or skew.

2. Replace the SCN Unit with a new one.

3. Replace the Main Board with a new one.

Possible Causes:

The scanner motor stopped running in the middle of the operation:

1. The scanning operation was stopped by;

– Disengaging of the scanner CR

– Disengaging of the scanner motor pulley or cracking of the scanner motor gears

Failed to read the scanner motor encoder:

2. Contamination of the scanner encoder

3. Failure of the scanner motor (not completely broken).

4. Failure of the Main Board (Connectors: CN409, CN410)

Confirmation Procedure:

1. Check the scanner FFC for damage, disconnection or skew.

2. Replace the SCN Unit with a new one.

3. Replace the Main Board with a new one.

Possible Cause:

Malfunction or crash of the firmware

Confirmation Procedure:

1. Turn the printer off and back it on.

2. If the error still occurs after the restart, replace the Main Board.

Possible Cause:

Malfunction or crash of the firmware

Confirmation Procedure:

1. Turn the printer off and back it on.

2. If the error still occurs after the restart, replace the Main Board.

Possible Causes:

The CR motor stopped running in the middle of the operation:

1. The CR was stopped by;

– Obstacles such as jammed paper

– Overload of the mechanism

– Interfere with the ink system

– Disengaging, fraying, jumping of the timing belt

– Crack or disengaging of the gear, or the APG lever interferes with the CR

Failed to read the CR encoder:

2. Contamination of the CR encoder scale

3. Failure of the CR motor (not completely broken)

4. Failure of the Main Board

Confirmation Procedure:

1. Check that no obstacle exist in the CR motion range.

2. Check the CR lock and ink system for any abnormality.

3. Check the timing belt for fraying or looseness.

4. Check the load applied to the CR by moving it by hand.

5. Check if the lubricant on the CR shaft is adequate.

6. Check the CR drive mechanism.

7. Clean the CR encoder scale if it is contaminated.

8. Replace the CR motor with a new one.

9. Replace the Main Board with a new one.

Possible Causes:

Failed to read the CR encoder:

1. Contamination of the CR encoder scale

2. Damage or skew of the CR encoder FFC

3. Failure of the CR encoder sensor

Failure of the CR motor driver:

4. Failure of the Main Board (Connectors: CN305, CN303)

Confirmation Procedure:

1. Clean the CR encoder scale if it is contaminated.

2. Check the FFC of the CR encoder.

3. Replace the CR encoder sensor with a new one.

4. Replace the Main Board with a new one.

Possible Causes:

Operation failure of the CR motor, stopped by obstacles:

1. CR was stopped by;

– Obstacles such as jammed paper

– Interfere with the ink system

– Disengaging or breakage of the gears

Failed to read the CR encoder:

2. Jumping of the CR timing belt

3. Contamination of the CR encoder scale

4. Damage or skew of the CR encoder FFC

5. Failure of the CR encoder sensor

6. Failure of the Main Board (Connectors: CN305, CN303)

Confirmation Procedure:

1. Check that no obstacle exist in the CR motion range.

2. Check the CR lock and ink system for any abnormality.

3. Check the timing belt for fraying or looseness.

4. Clean the CR encoder scale if it is contaminated.

5. Check the CR encoder FFC or the connector.

6. Replace the CR encoder sensor with a new one.

7. Replace the Main Board with a new one.

Possible Causes:

The CR motor did not run, or the CR could not move smoothly:

1. Overload of the CR

Failed to read the CR encoder:

2. The timing belt become frayed or jumping

3. Contamination of the CR encoder scale

4. Disconnection, break, skew or damage of the CR encoder FFC

5. Failure of the CR encoder sensor

6. Failure of the CR motor (the lead wire is broken or the connector is disconnected)

7. Failure of the Main Board (Connectors: CN305, CN303)

Confirmation Procedure:

1. Check that no obstacle exist in the CR motion range.

2. Move the CR by hand to see if it moves smoothly without getting stuck.

3. Check the timing belt for fraying or looseness.

4. Clean the CR encoder scale if it is contaminated.

5. Check the connector and the CR encoder FFC for damage.

6. Replace the CR encoder FFC with a new one.

7. Check the connector of the CR motor.

8. Replace the CR motor with a new one.

9. Replace the Main Board with a new one.

Possible Causes:

Operation failure of the CR:

1. The CR was stopped by;

– Obstacles such as jammed paper

– Overload of the mechanism

– Interfere with the ink system

Failed to read the CR motor encoder:

2. The timing belt become loosened or jumping

3. Contamination of the CR encoder scale

4. Damage or skew of the CR encoder FFC

5. Failure of the CR motor

6. Failure of the Main Board (Connectors: CN305, CN303)

Confirmation Procedure:

1. Check that no obstacle exist in the CR motion range.

2. Check the CR lock and ink system for any abnormality.

3. Check the timing belt for looseness.

4. Clean the CR encoder scale if it is contaminated.

5. Check the connector of the CR encoder FFC.

6. Replace the CR motor with a new one.

7. Replace the Main Board with a new one.

Possible Cause:

Malfunction or crash of the firmware

Confirmation Procedure:

1. Turn the printer off and back it on.

2. If the error still occurs after the restart, replace the Main Board.

Possible Causes:

The CR motor stopped running in the middle of the operation:

1. The CR was stopped by;

– Obstacles such as jammed paper

– Overload of the mechanism

– Interfere with the ink system

– Disengaging or breakage of the gears

– Disengaging, fraying, jumping of the timing belt

Failed to read the CR encoder:

2. Contamination of the CR encoder scale

3. Failure of the CR motor (not completely broken)

4. Failure of the Main Board (Connectors: CN305, CN303)

Confirmation Procedure:

1. Check that no obstacle exist in the CR motion range.

2. Check the CR lock and ink system for any abnormality.

3. Check the timing belt for fraying or looseness.

4. Check the load applied to the CR by moving it by hand.

5. Check if the lubricant on the CR shaft is adequate.

6. Check the CR drive mechanism.

7. Clean the CR encoder scale if it is contaminated.

8. Replace the CR motor with a new one.

9. Replace the Main Board with a new one.

Possible Causes:

Failed to read the CR encoder:

1. Contamination of the CR encoder scale

2. Damage or skew of the CR encoder FFC

3. Failure of the CR encoder sensor

Failure of the CR motor driver:

4. Failure of the Main Board (Connectors: CN305, CN303)

Confirmation Procedure:

1. Clean the CR encoder scale if it is contaminated.

2. Check the FFC of the CR encoder.

3. Replace the CR encoder sensor with a new one.

4. Replace the Main Board with a new one.

Possible Causes:

Operation failure of the CR motor, stopped by obstacles:

1. CR was stopped by;

– Obstacles such as jammed paper

– Overload of the mechanism

– Interfere with the ink system

Failed to read the CR encoder:

2. Jumping of the CR timing belt

3. Contamination of the CR encoder scale

4. Damage or skew of the CR encoder FFC

5. Failure of the CR encoder sensor

6. Failure of the Main Board (Connectors: CN305, CN303)

Confirmation Procedure:

1. Check that no obstacle exist in the CR motion range.

2. Check the CR lock and ink system for any abnormality.

3. Check the timing belt for fraying or looseness.

4. Clean the CR encoder scale if it is contaminated.

5. Check the CR encoder FFC or the connector.

6. Replace the CR encoder sensor with a new one.

7. Replace the Main Board with a new one.

Possible Causes:

Malfunction or crash of the firmware

The PE sensor remains in paper detection status and a paper jam error occurs instead of causing a fatal error.

Confirmation Procedure:

1. Turn the printer off and back it on.

2. If the error still occurs after the restart, replace the Main Board.

Possible Causes:

The PF motor stopped running in the middle of the operation:

1. The PF was stopped by;

– Obstacles such as jammed paper

– Overload of the paper feed mechanism

– Disengaging or breakage of the gears

Failed to read the PF motor encoder:

2. Contamination of the PF encoder scale

3. Disconnection, break, skew or damage of the PF motor cable/encoder FFC

4. Failure of the PF motor (not completely broken)

5. Failure of the Main Board

Confirmation Procedure:

1. Check that no pieces of paper or foreign objects exist in the paper path.

2. Check the load of the paper feed mechanism.

3. Check the wheel train of the PF drive and tooth breakage of the gears.

4. Check the PF encoder scale for damage or contamination.

5. Check the PF encoder FFC or the connector.

6. Replace the PF motor with a new one.

7. Replace the Main Board with a new one.

Possible Causes:

Failed to read the PF motor encoder:

1. Contamination of the PF encoder scale

2. Skew or damage of the PF encoder FFC

3. Failure of the PF encoder sensor

Failure of the PF motor driver:

4. Failure of the Main Board (Connectors: CN304, CN401)

Confirmation Procedure:

1. Clean the PF encoder scale if it is contaminated.

2. Check the PF encoder FFC or the connector.

3. Replace the PF encoder sensor with a new one.

4. Replace the Main Board with a new one.

Possible Causes:

Paper feed fails, stopped by obstacles:

1. Paper feed was stopped by;

– Obstacles such as jammed paper

– Overload of the paper feed mechanism

– Disengaging or tooth breakage of wheel train of the paper feed mechanism

Failed to read the PF motor encoder:

2. Contamination of the PF encoder scale

3. Skew or damage of the PF encoder FFC

4. Failure of the PF encoder sensor

5. Failure of the Main Board (Connectors: CN304, CN401)

Confirmation Procedure:

1. Check that no pieces of paper or foreign objects exist in the paper path.

2. Check the load of the paper feed mechanism.

3. Check the wheel train of the PF drive and tooth breakage of the gears.

4. Clean the PF encoder scale if it is contaminated.

5. Check the PF encoder FFC or the connector.

6. Replace the PF encoder sensor with a new one.

7. Replace the Main Board with a new one.

Possible Causes:

The PF motor did not run or obstacles exist in the paper path:

1. Overload of the paper feed mechanism

2. The PF timing belt become frayed, jumping, or the wheel train of paper feed mechanism is disengaged or its tooth is broken

Failed to read the PF motor encoder:

3. Contamination of the PF encoder scale

4. Disconnection, break, skew or damage of the PF encoder FFC

5. Failure of the PF encoder sensor

6. Failure of the PF motor (the lead wire is broken or the connector is disconnected)

7. Failure of the Main Board (Connectors: CN304, CN401)

Confirmation Procedure:

1. Check that no jammed paper exist in the paper path.

2. Check the load of the PF.

3. Check the wheel train of the PF drive and tooth breakage of the gears.

4. Clean the PF encoder scale if it is contaminated.

5. Check the PF encoder FFC or the connector.

6. Replace the PF encoder sensor with a new one.

7. Check the connector of the PF motor.

8. Replace the PF motor with a new one.

9. Replace the Main Board with a new one.

Possible Cause:

Malfunction or crash of the firmware

Confirmation Procedure:

1. Turn the printer off and back it on.

2. If the error still occurs after the restart, replace the Main Board.

Possible Causes:

The PF motor stopped running in the middle of the operation:

1. The PF was stopped by;

– Obstacles such as jammed paper

– Overload of the paper feed mechanism

– Disengaging or breakage of the gears

Failed to read the PF motor encoder:

2. Contamination of the PF encoder scale

3. Failure of the PF motor (not completely broken)

4. Failure of the Main Board

Confirmation Procedure:

1. Check that no pieces of paper or foreign objects exist in the paper path.

2. Check the load of the paper feed mechanism.

3. Check the wheel train of the PF drive and tooth breakage of the gears.

4. Clean the PF encoder scale if it is contaminated.

5. Replace the PF motor with a new one.

6. Replace the Main Board with a new one.

Possible Causes:

Failed to read the PF motor encoder:

1. Contamination of the PF encoder scale

2. Skew or damage of the PF encoder FFC

3. Failure of the PF encoder sensor

Failure of the PF motor driver:

4. Failure of the Main Board (Connectors: CN304, CN401)

Confirmation Procedure:

1. Clean the PF encoder scale if it is contaminated.

2. Check the PF encoder FFC or the connector.

3. Replace the PF encoder sensor with a new one.

4. Replace the Main Board with a new one.

Possible Causes:

Paper feed fails, stopped by obstacles:

1. Paper feed was stopped by;

– Obstacles such as jammed paper

– Overload of the paper feed mechanism

– Disengaging or tooth breakage of wheel train of the paper feed mechanism

Failed to read the PF motor encoder:

2. Contamination of the PF encoder scale

3. Skew or damage of the PF encoder FFC

4. Failure of the PF encoder sensor

5. Failure of the Main Board (Connectors: CN304, CN401)

Confirmation Procedure:

1. Check that no pieces of paper or foreign objects exist in the paper path.

2. Check the load of the paper feed mechanism.

3. Check the wheel train of the PF drive and tooth breakage of the gears.

4. Clean the PF encoder scale if it is contaminated.

5. Check the PF encoder FFC or the connector.

6. Replace the PF encoder sensor with a new one.

7. Replace the Main Board with a new one.

Possible Causes:

PE Sensor damage

Failure of the Main Board

Occurs when the light value became lower than the threshold value in light value adjustment.

(Connector: CN402)

Confirmation Procedure:

1. Check the PE Sensor for broken cable or unconnected connector.

2. Replace the PE Sensor with a new one.

3. Replace the Main Board with a new one.

Possible Causes:

PW Sensor damage

Failure of the Main Board

Cannot detect paper even the light value was raised to maximum in light value adjustment.

(Connector: CN303)

Confirmation Procedure:

1. Check the PW Sensor for broken cable or unconnected connector.

2. Replace the PW Sensor with a new one.

3. Replace the Main Board with a new one.

Possible Causes:

PE Sensor damage

Failure of the Main Board

Cannot detect paper even the light value was raised to maximum in light value adjustment.

(Connector: CN402)

Confirmation Procedure:

1. Check the PE Sensor for broken cable or unconnected connector.

2. Replace the PE Sensor with a new one.

3. Replace the Main Board with a new one.

This error occurs after paper feed, before start printing.

Possible Causes:

P/S cable broken/caught.

Failure of a P/S circuit part (thermistor open)

Main Board circuit failure (Failure of the temperature detection circuit)

(Connector: CN604)

Confirmation Procedure:

1. Replace the P/S cable with a new one.

2. Replace the P/S Unit with a new one.

3. Replace the Main Board with a new one.

This error occurs after paper feed, before start printing.

Possible Causes:

Failure of a P/S circuit part (excess heat):

1. Foreign obstacle entered inside the Power Supply (excess heat by thermistor short, leakage)

Main Board circuit failure:

2. Foreign obstacle on the Main Board and/or connectors

3. Failure of the temperature detection circuit

Confirmation Procedure:

1. Replace the P/S Unit with a new one.

2. Replace the Main Board with a new one.

This occurs in-between print passes (after printing one pass and before printing the next pass).

Possible Causes:

Disconnection, break, skew or damage of the head FFC

Overheat of the Print Head:

1. Failure of the Print Head

2. Failure of the Main Board (Connector: CN301)

Confirmation Procedure:

1. Check the head FFC for disconnection, break, skew or damage.

2. Replace the Print Head with a new one.

3. Replace the Main Board with a new one.

This occurs every after ink flushing operation (Flushing before starting printing, flushing after manual cleaning and etc.)

Possible Causes:

Disconnection, break, skew or damage of the head FFC

Overheat of the Print Head:

1. Failure of the Print Head

2. Failure of the Main Board (Connector: CN301)

Confirmation Procedure:

1. Check the head FFC for disconnection, break, skew or damage.

2. Replace the Print Head with a new one.

3. Replace the Main Board with a new one.

This occurs after receiving a print job and starting printing.

Possible Causes:

Since continued overload printing in high temperature, protective function of the head driven circuit worked.

Failure of the Main Board

Confirmation Procedure:

Replace the Main Board with a new one.

This occurs after receiving a print job and starting printing. Temperature around the Print Head is out of the range from -20 to 80 degrees C.

Possible Causes:

Disconnection, break, skew or damage of the head FFC

Failure of the thermistor inside the Print Head

(Connector: CN301)

Confirmation Procedure:

1. Check the head FFC for disconnection, break, skew or damage.

2. Replace the Print Head with a new one.

3. Replace the Main Board with a new one.

This occurs at power-on, when replacing the ink cartridge, in-between print passes, and after flushing operation.

Possible Causes:

Failure of the power source for the Print Head:

1. Failure of the circuit

– Disconnection, break, skew, or damage of the head FFC

2. Blowout of fuse on the Main Board

Failure of the Print Head

(Connector: CN301)

Confirmation Procedure:

1. If the fuse has not blown out:

1) Check the head FFC for disconnection, break, skew or damage.

2. If the fuse has blown out:

1) Replace the Main Board with a new one.

3. In the other cases:

1) Replace the Print Head with a new one.

Occurrence frequency based on past record is 1. > 2. > 3.

Possible Causes:

1. Head FFC failure (skew, foreign object attached)

2. Failure of the head

3. Failure of the Main Board (Connector: CN301)

Confirmation Procedure:

1. Check the head FFC.

2. Replace the Print Head with a new one.

3. Replace the Main Board with a new one.

This occurs at power-on.

Possible Causes:

Error in the printer settings

Failure of the Main Board

Confirmation Procedure:

1. Turn the printer off and back it on.

2. If the error still occurs after the restart, replace the Main Board.

Since the panel displays “paper jam error”, user do not notice but the error log remains.

Possible Cause:

The carriage does not move:

1. Overload of the Carriage Drive Mechanism (paper jam, foreign object)

2. Failure of the Ink system

3. Failure of the CR Motor

4. Failure of the Main Board

Confirmation Procedure:

1. Check that no obstacles or paper exist in the carriage motion range.

2. Manually unlock the carriage. (If unlocking is impossible, the problem caused by failure of the Ink system.)

3. Check the load applied to the CR by moving it by hand.

4. Turn the printer on and check if the carriage moves. If it still does not move, the motor is broken or failure of the Main Board.

Possible Causes:

Non-supported printer driver

Mismatch between custom printer driver and custom printer

Confirmation Procedure:

Check the OS and the version of the printer driver.

Possible Cause:

Failure or disconnection of the wireless network board

(Connector: CN202)

Confirmation Procedure:

1. Check the wireless network board.

2. Check the FFC.

Possible Cause:

Failure or disconnection of the Card Slot Board Assy

(Connector: CN203)

Confirmation Procedure:

1. Card Slot Board Assy

2. State of the FFC

Possible Cause:

An error code will be assigned to each firmware internal error as necessary.

Confirmation Procedure:

1. Firmware version

2. Main Board

Service support mode is a service dedicated special mode that can be started by a special operation from the LCD panel. It allows you to execute functions including printer mode, service status sheet, and touch panel adjustment. ET-2750/ET-2760/L4160/ST-2000 series are excluded from this mode because they don’t have LCD.

Maintenance SP Mode (Touch Panel 2.4 inch model):

Run: [Touch PNL] / Select: [HELP]

1. Printer Inspection Mode

2. Status Sheet Print Mode

3. Touch Screen Calibration

Maintenance SP Mode (LCD Model):

Run: [OK] / Select: [UP][DOWN]

1. Printer Inspection Mode

2. Status Sheet Print Mode

Service support mode: top menu functions:

1. Press the [SW1] and [Power SW] button simultaneously until the screen switches, starting the printer.

ID to enter: 61544

1. Tap [SW3] until the value necessary for the current digit is displayed.

2. Tap [SW1] to enter the value. The value will change to “*”, and the cursor goes to the next digit.

3. Repeat steps 1 and 2 to enter the 5 digit ID.

4. When entry is completed, tap [SW2] to confirm.

1. Press the [SW1] (Left Arrow button) and [Power SW] button simultaneously until the screen switches, starting the printer.

ID to enter: 61544

1. Press [Up] or [Down] until the value necessary for the current digit is displayed.

2. Press [Right] to enter the value. The value will change to “*”, and the cursor goes to the next digit.

3. Repeat steps 1 and 2 to enter the 5 digit ID.

Note:

– It is not possible to return to the previous digit after shifting digits. If you wish to correct the number of the previous digit, proceed with the steps until after step 3 and then perform input again.

– Please note that the execute button ([OK]) is not enabled until at least two digits have been entered.

When a different mode starts:

If you enter the wrong ID and a different mode starts, there is the possibility of changing important settings of the unit. Press the power button to turn off the power immediately and then perform the process again to enter the correct ID number.

When non-existent ID number:

The panel LCD displays “Input ID is not found!! Please wait Poweroff…” and the power is turned off automatically.

The following status sheets can be printed:

– Printer Information Sheet: printer settings information

– Supply Status Sheet: supported model numbers of consumables or periodic replacement parts, and the total number of sheets fed into the printer.

– Usage History Sheet: usage history such as the total number of printed pages per function.

– Service Status Sheet: in addition to the information included in the above three sheets, information required for servicing is also provided. (Can only be printed in service support mode).

(Total pages: 2 sheets)

(Total pages: 1 sheet)

(Total pages: 2 sheets)

(Total pages: 6 sheets)

Use only specified tools to avoid damaging the printer.

Note 1: “Availability” ✓ means that use of a commercially available one is permitted.

Note 2: EPSON provides the tools listed with EPSON part code.

Time is in units of seconds (minutes:seconds).

Time is in units of seconds (minutes:seconds).

Time is in units of seconds (minutes:seconds).

WETTING OF VENTILATION FILM

The film under the sealing film attached on the Ink Tank is a breathable film. Air in the ink tank is released outside through this film, allowing the air hole to keep ink supply to the Print Head stable. If the film gets wet with ink, the air in the tank is not properly released outside and may cause degradation in print quality.

Determining whether the breathable film is wet or not:

When the breathable film is wet, tank replacement is necessary. Because it is hard to notice that the film is wet just by visually checking its surface, determine that according to whether the ink has reached a certain portion of the air chamber (indicated by a red square in diagrams within the PDF). If the ink has reached this area, the breathable film is probably wet. In this case, replace the Ink Tank.

DIFFERENT TYPE OF INK MIXED IN INK TANK

From the specification of the CISS models, different type/color of ink may get mixed by mistaking the ink injection place. If there is a problem in printing result, the cause may be ink mixture. Refer to the following to handle the problem:

Mixture of different type/color of the ink is state as follows:

– Different type: pigment black ink and dye color ink mixed

– The head nozzles may get clogged with solidified ink particles.

– Different color: dye color inks mixed.

– A print quality problem will occur, but ink solidification will not occur.

It is recommended to remove the user’s Maintenance Box/Porous Pad Assy when performing the ink tube refresh because it consumes a lot of ink. The powerful cleaning in the adjustment program corresponds to the ink tube refresh. Select “not to count up the waste ink counter” to prevent a mismatch between the program’s waste ink counter and the counter of the user’s Porous Pad Assy. (Note: If you do not select the option, the waste ink counter will count up during the ink tube refresh.)

When the ink got mixed, it is necessary to clean the CISS mechanism (from the Ink Tank to the Adapter). There are two methods:

Method 1: Replace the CISS mechanism

1. Replace the CISS mechanism

2. Remove the user’s Maintenance Box/Porous Pad Assy and attach the Porous Pad for jigs.

3. To clean the head, inject CR02 into the tank.

4. Start “head cleaning” or “ink refill”, select “not to count up the waste ink counter”, then perform the ink tube refresh. (For specific models, cleaning without counting up the waste ink counter is available only in the service support mode).

5. After each ink tube refresh, print a page to see if a blank page is printed (printed only with CR02). Repeat ink tube refresh until you get a blank page print.

6. Eject CR02 from the Ink Tank and fill the tank with new ink.

7. Perform the ink tube refresh again, and then check that the print quality has been recovered.

Method 2: Cleaning inside the ink path (reusing the CISS mechanism)

1. Eject the ink inside the Ink Tank/ink tube.

2. Inject CR02 into the Tank to clean the head and the CISS mechanism.

3. Start the adjustment program, select “not to count up the waste ink counter”, then repeat ink tube cleaning.

4. Start “head cleaning” or “ink refill”, select “not to count up the waste ink counter”, then repeat the ink tube refresh. (For specific models, cleaning without counting up the waste ink counter is available only in the service support mode).

5. Eject CR02 from the Ink Tank and fill the tank with new ink.

6. Perform the ink tube refresh again, and then check that the print quality has been recovered.

Ink leakage may occur when removing ink-related parts. When the printer gets soiled by ink leakage, wipe the ink with a cloth wet with CR02. Do not use alcohol on parts that touch the ink, such as tube connecting parts and adapters.

The following parts may cause ink leakage when removing:

(Locations A and B refer to diagram positions in the PDF)

How to Minimize Ink Leakage:

Before disassembling, check the following methods:

1. Removing adapter from the carriage:

Before disconnecting the joint parts of the ink path, make sure to remove the Adapter from the Carriage.

2. Disconnecting the Adapter and the Adapter Tube:

– Be careful not to press the film portion of the Adapter since doing so may cause ink to leak. Hold the Adapter by its plastic portion when disconnecting the Adapter tube.

– Before disconnecting the tube, pinch it with a tube clip (Tool needed) and cover the tube end with a cloth (Tool needed) to minimize ink leakage.

– Perform disconnection off the printer and be careful not to soil the printer and things around.

– **Procedure:**

1. Pinch the adapter tube with a tube clip and remove it from the adapter.

2. To prevent ink leakage, plug a cotton swab into the tip of the adapter tube.

3. Remove the tube clip from the adapter tube.

4. Repeat Step 1 to Step 3 until all four adapter tubes are removed.

Before removing the Ink Tank, discharge the ink if necessary using the following procedure:

1. Disconnect the adapter from the printhead.

2. Connect any syringe (standard: tip of the syringe = ø3.2mm, capacity = 50 mL) to the disconnected adapter.

3. Open the Cap Hinge Tank.

4. Suck out the ink inside the Ink Tank with the connected syringe.

5. Repeat Step 1 to Step 4 for each color.

The Duplex Unit must be removed before starting disassembly procedures outlined in the flowchart.

The following table outlines the required adjustments based on the replaced part. ‘◎’ indicates required when removing/replacing, ‘Ο’ indicates required only when replacing, and ‘-‘ indicates no adjustment is required.

The following table outlines the required adjustments based on the replaced part. ‘◎’ indicates required when removing/replacing, ‘Ο’ indicates required only when replacing, and ‘-‘ indicates no adjustment is required.

The Adjustment Program requires the following operating environment:

OS: Windows 7, Windows 8.1, Windows 10

Interface: USB

Purpose: Set the clearance of the gap between the nozzle surface of the print head and the platen to an appropriate amount.

Procedure Overview: Place a thickness gauge in the specified location and then move the carriage unit over the thickness gauge and check the clearance.

Tools: Thickness gauge, Teflon tape.

Standard Range: 1.70 +/- 0.25 mm (for µTFP1S head).

Important Notes (for µTFP1S head):

Check the platen gap before installing the CR Scale, after attaching the adapter.

The µTFP1S Head has an integral structure. If the thickness gauge touches the nozzle surface directly, it may be damaged.

Apply Teflon tape (thickness: 0.08 mm) to all thickness gauges used for checking the Platen Gap in advance.

Use commercially available Teflon tape of 0.08 mm thickness.

Ensure no bubbles or foreign material remain under the tape when applying.

Teflon Tape Application Procedure:

1. Clean the surfaces of the thickness gauge with alcohol.

2. Apply Teflon tape on the thickness gauge.

3. Fold the excess tape along the edges and trim the portions at about the center in the thickness direction.

4. Ensure no tears or burrs on the applied tape.

Wear heavy gloves when trimming. Cut in the opposite direction, away from the hand holding the gauge.

Confirmation Procedure (for µTFP1S head):

1. Move the CR Unit to the middle of the printer.

2. Place the 1.45 mm (1.37 mm + 0.08 mm) thickness gauges (protected with Teflon tape) on the specified points.

3. Move the CR Unit to the right and left. Ensure it does not touch the gauges. If it touches, the PG is narrower than standard; reassemble the Printer Mechanism.

4. Move the CR Unit back to the middle and place the 1.95 mm (1.87 mm + 0.08 mm) thickness gauges (protected with Teflon tape) on the same points.

5. Move the CR Unit to the right and left. Ensure it touches the gauges. If it does not touch any gauge, the PG is wider than standard; reassemble the Printer Mechanism.

Important Notes during Confirmation:

Move the CR Unit by pulling the top of the CR timing belt.

Be careful not to damage the nozzle surface with the thickness gauge.

Be careful not to let the Print Head run onto the gauge.

Tools (for F2 head): Thickness gauges for PG check: 1.45 mm gauge, 1.95 mm gauge. (Applying Teflon tape is not necessary for F2 Head gauges).

Purpose: Adjust the position relationship between the LCD screen and touch panel detection coordinate.

Tools: Touch pen (without a sharp end, such as a plastic stick).

Procedure Overview:

1. Start the printer in the service support mode.

2. Press the help button [SW3], select “Touch Screen Calibration” on the screen, and tap the touch panel [SW2].

3. Tap the touch panel [SW2] to display the adjustment screen. (Press help button [SW3] to cancel).

4. Press the “+” symbol indicated on the four corners of the touch panel one by one with a touch pen.

5. When “Calibration check” appears, tap the touch panel [SW3] to save the adjustment. (To retry, press the help button [SW3] and repeat from step 3).

6. Press the four “+” symbols again as indicated.

7. When “Complete!” appears, tap the touch panel [SW2] to end the adjustment.

8. If “Retry Check” appears, tap the touch panel [SW2] to retry from step 6.

Note: You can operate menu selections using the Home button [SW1], Touch panel [SW2], and Help button [SW3] while in service support mode.

Purpose: To copy adjustment values from an old Main Board to a new one when replacement is needed. If successful, other adjustments after Main Board replacement may not be necessary.

Procedure Overview: With the old Board installed, use the adjustment program to read out the EEPROM data. After exchanging with the new Board, load the read-out data onto the new board using the adjustment program.

Tools: Adjustment Program.

Note for ET-2750/ET-2760/L4160/ST-2000 series/ET-2700/L4150 series: If EEPROM data cannot be read from the old Main Board, the Waste Ink Tray Assy must be replaced along with the Main Board.

Purpose: Must be carried out after replacing the Main Board to apply settings for the target market, etc. Perform MAC address Setting if necessary.

Procedure Overview: Enter the product serial number of the printer using the adjustment program, and write the initial setting information onto the Main Board.

Tools: Adjustment Program.

Purpose: Input the ID incorporating the correction values for print head production variations.

Procedure Overview: Select “Head ID Input” from the Adjustment Program and execute the item (Auto input). After the ID is input, check that the correct print head ID has been written in the same menu.

Tools: Adjustment Program.

Purpose: Reset the deterioration correction counter.

Procedure Overview: Select “Initialize PF deterioration offset” or “Initialize PW sensor deterioration counter” from the Adjustment Program and execute the counter reset.

Tools: Adjustment Program.

Purpose: Measure product variations to set appropriate correction values. Also, performs a pass/fail judgment by calculating if the operation load is within the expected range from the motor current value.

Procedure Overview: Automatically measure the correction value and perform the operation load check by selecting “[PF/CR/Scanner] heat protection control” from the Adjustment Program menu and executing the item.

Tools: Adjustment Program.

Purpose: Use software to correct the offset due to mechanical variations and media transportation characteristics.

Paper/Feed Tray: Paper type: Photo matte paper, Size: A4.

Procedure Overview:

1. Start the Adjustment Program.

2. Select “PF/EJ adjustment”.

3. The PF/EJ adjustment menu appears.

4. Load paper into the paper feed tray.

5. Press the [Print] button to print the adjustment pattern.

6. Check the adjustment pattern.

7. Determine the adjustment value based on the judgment criteria: Select the numerical value of the pattern that has no overlapping of the upper and lower blocks and the least white bands.

8. Enter the adjustment value in the PF/EJ adjustment menu.

9. Press the [Finish] button to end adjustment.

Tools: Adjustment Program.

Purpose: Use software to correct the offset of band printing due to mechanical variations and media transportation characteristics.

Paper/Feed Tray: Paper type: Plain Paper, Size: A4.

Procedure Overview:

1. Start the Adjustment Program.

2. Select “PF Band adjustment”.

3. The PF Band adjustment menu appears.

4. Load paper into the paper feed tray.

5. Press the [Print] button to print the adjustment pattern.

6. Check the adjustment pattern.

7. Determine the adjustment value based on the judgment criteria: Select the numerical value of the pattern that has no overlapping of the upper and lower blocks and the least white bands.

8. Enter the adjustment value in the PF Band adjustment menu.

9. Press the [Finish] button to end adjustment.

Tools: Adjustment Program.

Purpose:

PW Adjustment: Correct the offset due to sensor characteristics and attachment variations.

1st Dot Adjustment: Correct the print timing so that the main scanning direction print start position becomes the target value.

Paper/Feed Tray: Paper type: Photo matte paper, Size: A4.

Procedure Overview:

1. Start the Adjustment Program.

2. Select “PW / 1st Dot adjustment”.

3. The PW / 1st Dot adjustment menu appears.

4. Load paper into the paper feed tray.

5. Press the [Print] button to print the adjustment pattern.

6. Check the adjustment pattern.

7. Determine the adjustment value based on the judgment criteria:

PW adjustment: From the stepped patterns printed on the bottom, top, left, and right edges, select the numerical value that is 5 mm from the edge of the paper for each.

1st Dot adjustment: Select the value at the location of the misaligned pattern and straight lines printed on the left of the paper.

8. Enter the adjustment value in the PW / 1st Dot adjustment menu.

9. Press the [Finish] button to end adjustment.

Tools: Adjustment Program, Ruler.

Purpose: Use software to correct the vertical/horizontal tilt that occurs when installing the head.

Paper/Feed Tray: Paper type: Plain Paper, Size: A4.

Procedure Overview:

1. Start the Adjustment Program.

2. Select “Head angular adjustment”.

3. The Head angular adjustment menu appears.

4. Load paper into the paper feed tray.

5. Press the [Print] button to print the adjustment pattern.

6. Check the adjustment pattern.

7. Determine the adjustment value based on the judgment criteria: From among the printed patterns, select the pattern where the above and below lines are the straightest.

8. Enter the adjustment value in the head angular adjustment menu.

9. Press the [Finish] button to end adjustment.

Tools: Adjustment Program.

Purpose: Use software to correct the print timing for aligning the print position between the outward path and return path when bidirectional printing.

Paper/Feed Tray: Paper type: Plain Paper, Size: A4.

Procedure Overview:

1. Start the Adjustment Program.

2. Select “Bi-d adjustment”.

3. The Bi-d adjustment menu appears.

4. Load paper into the paper feed tray.

5. Press the [Print] button to print the adjustment pattern.

6. Check the adjustment pattern.

7. Determine the adjustment value based on the judgment criteria: Select the pattern for which there is no gap and overlapping of the left and right patterns.

8. Enter the adjustment value in the Bi-d adjustment menu.

9. Press the [Finish] button to end adjustment.

Tools: Adjustment Program.

Purpose: Use software to correct the print timing for aligning the print position between the outward path and return path when bidirectional printing in band feed mode.

Paper/Feed Tray: Paper type: Plain Paper, Size: A4.

Procedure Overview:

1. Start the Adjustment Program.

2. Select “Paper Skew adjustment”.

3. The Paper Skew adjustment menu appears.

4. Load paper into the paper feed tray.

5. Press the [Print] button to print the adjustment pattern.

6. Check the adjustment pattern.

7. Determine the adjustment value based on the judgment criteria: From among the printed patterns, select the pattern where the above and below lines are the straightest.

8. Enter the adjustment value in the Paper Skew adjustment menu.

9. Press the [Finish] button to end adjustment.

Tools: Adjustment Program.

Purpose: Use software to correct the paper detection position offset caused by variations in the PE sensor attachment position and print head position.

Paper/Feed Tray: Paper type: Plain Paper, Size: A4.

Procedure Overview: Select “PE adjustment” from the Adjustment Program menu and execute. Run plain paper through. The software corrects paper errors in the detected position.

Tools: Adjustment Program.

Purpose: Run this cleaning when missing dots are observed on an adjustment pattern printed by the adjustment program.

Procedure Overview: Perform a head cleaning using the adjustment program. Print a nozzle check pattern to see if all nozzles fire ink properly.

Tools: Adjustment Program.

Purpose: Must be carried out after replacing the Print Head to fill ink inside all nozzles of the new ASP Print Head.

Procedure Overview: After installing the Waste Ink Tray Assy (if applicable) or Print Head, perform an ink charge using the adjustment program. Print a nozzle check pattern to see if all nozzles fire ink properly. Auto cleaning can also be set.

Tools: Adjustment Program.

Purpose: When a maintenance error occurs, replace the waste ink pad and reset the counter. This can also be done when the counter is nearly full but the error hasn’t occurred yet, to prevent future service calls.

Procedure Overview: After exchanging the Porous Pad (Waste Ink Tray Assy/Paper Guide Lower Waste Ink Pad Assy), initialize the counter using the adjustment program.

Tools: Adjustment Program.

Purpose: Use this to check if all adjustments have been properly made.

Paper/Feed Tray: Paper type: Plain Paper, Photo Matte paper, Size: A4.

Procedure Overview: Select the “Final check pattern print” function in the adjustment program. All adjustment patterns are printed automatically.

Tools: Adjustment Program.

Purpose: After repairs, reset the error history, and as necessary select cleaning for when the printer is next turned on.

Procedure Overview: Select “Preparation for shipment” from the Adjustment Program menu and execute it.

Tools: Adjustment Program.

Reason: Ink may attach to the CR Unit due to the structure of the Print Head (µTFP head) and CR Unit, potentially causing a head short circuit if ink attaches to the head FFC terminal during Print Head replacement.

When to Clean: Only when replacing the Print Head.

Tools: Cotton swab or soft dry dust-free cloth.

Procedure:

1. After pulling out the head FFC while holding the Print Head from the carriage, check for ink attachment on the CR Unit.

2. If ink is attached, wipe it off with a cotton swab or cloth.

Warning: Ensure the Head FFC is not contaminated with ink beforehand when installing the Print Head.

When to Clean: Only if you can visually see foreign material soiled on the nozzle plate section of the Print Head (F2 head).

Tools: Soft dry dust-free cloth, Liquid (pure water/CR02).

Procedure:

1. Remove foreign material by moving a soft dry dust-free cloth slowly and lightly over the soiled area.

Important Notes & Warnings:

Make sure not to break the nozzle plate with excess force.

Make sure not to deform the head cover.

To prevent mixed colors, clean parallel to the nozzle line.

Only wipe off where foreign material attaches; avoid touching other sections as much as possible.

If foreign material is large, wipe it off with a clean part of the cloth in batches.

Pure water/CR02 can be used to enhance transcription of foreign material.

Do not use undesignated liquid (tap water/CR06) as it may negatively influence the Print Head filter.

Exterior parts (e.g., housing): Wipe dirt off with a soft clean cloth moistened with water. For glossy or transparent parts, use unwoven cloth to avoid scratching.

Inside of the printer: Remove paper dust with a vacuum cleaner.

Rubber or plastic rollers (e.g., LD Roller): If paper dust decreases frictional force causing feed problems, moisten a cloth with water or diluted alcohol (such as 70% diluted ether), wring it out, and wipe the dust off the roller.

Ink Stains: Wipe stains off with a cloth wrung out of diluted alcohol.

Warnings:

Do not use alcohol for cleaning transparent parts; it may cause cloudiness.

When wiping paper dust off Pickup/Middle/LD Rollers, be careful not to rub against the surface asperity.

After using alcohol, wipe the part with a soft dry dust-free cloth to remove alcohol traces fully.

Refer to the specific lubrication points and instructions in the service manual for the part requiring lubrication. Apply the specified type and amount of grease.

Grease Types:

Tools: Injector, Brush, Flux dispenser (specifications as per service manual).

Check the manual for whether parts supplied as ASP (Assembly Service Parts) require lubrication and their status when supplied.

Frame Base (1) (Specific models only):

Points: Cassette sliding parts of Frame Base Left/Right (4 points total).

Type: G-96.

Amount: Appropriate.

Remarks: Apply with Flux Dispenser. Stir G-96 before use.

Frame Base (2):

Points: Stacker sliding parts of Frame Base Left/Right (4 points total).

Type: G-96.

Amount: Appropriate.

Remarks: Apply with Flux Dispenser. Stir G-96 before use.

Frame Base (3) (Specific models only):

Points: Around the hole where Pick up Release Lever of Frame Base Right is attached (2 points).

Type: G-97.

Amount: 0.1 g (Size of a grain of rice).

Remarks: Apply with injector, spread with a brush.

Frame Base (4):

Points: Contact points between PF Roller and Frame Base Left/Right (2 points); Contact points between EJ Roller and Frame Base Left/Right (3 points).

Type: G-97.

Amount: 0.02 g.

Remarks: Apply with injector.

PF Roller:

Point: Contact point of PF Roller and PF Roller Grounding Spring.

Type: G-97.

Amount: 0.02 g.

Remarks: Apply with injector.

CR Driven Pulley:

Points: Contact points between Driven Pulley Holder and Main Frame (8 points); Shaft hole of Driven Pulley; Bush on Driven Pulley Holder.

Type: G-97.

Amount: 0.002 g.

Remarks: Apply with injector.

Main Frame (1):

Points: Contact points with Main Frame and Slider Trans (4 points).

Type: G-97.

Amount: Appropriate.

Remarks: Apply with injector.

Main Frame (2):

Points: Contact points with the Main Frame and the CR Unit (4 points).

Type: G-97.

Amount: 0.15 g each.

Remarks: Apply with injector, rub off excess. Lubricate sequentially: (1) Lubricate point (1). (2) Move CR Unit to center, lubricate 80 digit side points (2)(3)(4). (3) Move CR Unit to edge of 80 digit side. (4) Lubricate 0 digit side points (2)(3)(4).

Center Support (Specific models only):

Points: Contact points between PF Roller and Center Support (2 points).

Type: G-96.

Amount: Appropriate.

Remarks: Apply with Flux Dispenser. Stir G-96 before use.

Pick up Roller Assy (Supplied Lubricated):

Points: Contact points between Pick up Roller Assy and roller shaft (15 points).

Type: G-96.

Amount: Appropriate.

Remarks: Apply with Flux Dispenser. Stir G-96 before use.

Frame ASF Rear Assy (Specific models only):

Points: Contact point between Shaft LD Rear Assy and Hopper (1 point); Contact point between Shaft LD Rear Assy and Paper Back Lever (1 point).

Type: G-97.

Amount: Range of 7 mm from edge (0.05 g); Tip part (0.05 g).

Remarks: Apply with injector, spread by rotating Shaft LD Rear clockwise. Rub off excess.

LD Holder (Specific models only):

Points: Bush of LD Holder (3 points).

Type: G-96.

Amount: Appropriate.

Remarks: Apply with Flux Dispenser. Stir G-96 before use.

SCN Unit (1):

Points: Guide rail section of SCN Housing Lower (6 points).

Type: G-45.

Amount: 0.02 g each.

Remarks: Apply with injector to 6 points. Use a brush to spread side to side three times. Avoid lubricating other parts.

SCN Unit (2) (Specific models only):

Points: Shaft part of SCN Housing Lower (4 points).

Type: G-45.

Amount: Φ1 mm x 5 mm.

Remarks: Apply with injector. Avoid lubricating other parts.

ADF Unit (1) (Specific models only):

Points: Shaft part of Bevel Gear Shaft 10.4.

Type: G-97.

Amount: 0.03 g.

Remarks: Avoid lubricating other parts.

ADF Unit (2) (Specific models only):

Points: Inside shaft hole of Connection Gear Cover Lower.

Type: G-96.

Amount: Appropriate.

Remarks: Apply with Flux Dispenser. Stir G-96 before use.

The Head Fuse, labeled F301, is located on the Main Board near the main processor chip and power input connectors. Refer to Figures 6-3 and 6-4 in the service manual for visual identification on different board revisions.

Use packing tape as specified for each component to prevent damage during transport.

CR Unit:

Tape: Length: 200 mm, width: 14 mm, fold on the end: 5 mm.

Method: Turn off printer, move CR Unit fully to 0-digit side. Align unfolded tape end with Section A on CR Unit, attach. Route tape over CR Cover and attach folded end to Housing Right.

ADF/SCN Unit (Specific models only):

Tape: Length: 150 mm, width: 14 mm, fold on the end: 5 mm.

Method: Secure the unit using tape placed across the seam between the ADF/SCN unit and the main body, approximately 30 mm from the left and right edges, folding the ends.

SCN Unit (Specific models only):

Tape: Length: 120 mm, width: 14 mm, fold on the end: 5 mm.

Method: Secure the unit using tape placed across the seam between the SCN unit and the main body, approximately 30 mm from the left and right edges, folding the ends.

Panel Unit:

Tape: Length: 80 mm, width: 14 mm, fold on the end: 5 mm.

Method: Align unfolded tape end with the left edge of the power button. Paste the tape so it does not cover the label or power button, securing the panel unit.

Stacker (ET-4750/ET-4760/L6190/ST-4000 series/ET-3750/ET-3760/L6170/ST-3000 series/ET-3700/ET-3710/L6160 series only):

Tape: Two pieces. Length 1: 150 mm, width: 14 mm, fold: 5 mm. Length 2: 180 mm, width: 14 mm, fold: 5 mm.

Method: Use tape to secure the stacker to the paper cassette as shown in the manual diagram.

Stacker (ET-2750/ET-2760/L4160/ST-2000 series/ET-2700/L4150 series only):

Tape: Two pieces. Length 1: 80 mm, width: 14 mm, fold: 5 mm. Length 2: 180 mm, width: 14 mm, fold: 5 mm.

Method: Secure the stacker using tape placed across the seam between the stacker and the main body/paper cassette, approximately 30 mm from the left and right edges, folding the ends.

Duplex Unit (ET-4750/ET-4760/L6190/ST-4000 series/ET-3750/ET-3760/L6170/ST-3000 series/ET-3700/ET-3710/L6160 series only):

Tape: Two pieces. Length: 100 mm, width: 14 mm, fold: 5 mm.

Method: Place tape vertically on the rear, securing the duplex unit to the main body near the left and right edges, folding the ends.

Duplex Unit (ET-2750/ET-2760/L4160/ST-2000 series only):

Tape: Two pieces. Length: 100 mm, width: 14 mm, fold: 5 mm.

Method: Place tape vertically on the rear, securing the duplex unit to the main body near the center, approximately 30 mm apart, folding the ends.

Paper Support (ET-2750/ET-2760/L4160/ST-2000 series/ET-2700/L4150 series only):

Tape: Length: 120 mm, width: 14 mm, fold: 5 mm.

Method: Pull out paper support, paste tape on the center. Insert paper support, fold tape over the rear edge and paste.

The following screw types and torques are used:

After completing all necessary adjustments based on the replaced parts, perform a “Final check pattern print” to verify all adjustments.

If replacing the Main Board and Printer Mechanism simultaneously, perform adjustments after the initial setting.

For ET-4750U/2750U models, after adjustments, perform a print, copy, and FAX function test using the printer driver or external commands while the printer power is ON (connection to adjustment program can be lost). If the printer was powered OFF, restart the adjustment program, connect via USB, select ‘Printer information check’, then execute print/copy/FAX.

Follow the specific routing diagrams and instructions provided in the service manual for each cable/FFC. General guidelines include:

Use double-sided tape where indicated to secure FFCs.

Align fold lines with edges of components as specified.

Route cables/FFCs through designated hooks, slits, and channels.

Ensure ferrite cores are positioned correctly.

Avoid pinching cables/FFCs during reassembly.

Connect connectors fully to the Main Board or respective components.

Specific routing instructions are detailed for: Card Slot FFC, Head FFC, PE Sensor FFC, CR Motor Cable, Ink Eject FFC, Panel FFC, Panel Grounding Cable, Fax Box FFC, PW Sensor FFC, Paper Set Detection Sensor FFC, ADF PE Sensor Cable, SCN FFC, Holder Star Wheel Grounding Cable.