Fast and flexible The EU-T series thermal printer is fast, highly flexible and compact. It prints at mm a second, including complex graphics and bar codes. Paper width, diameter and thickness can all be adjusted by terminal manufacturers. Compact Designed to fit into terminals of all sizes, compact dimensions and a small footprint make the EU-T series perfect for smaller terminals. The paper roll for the EU-T series is loaded inside the unit.

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Quick Links. Download this manual. Table of Contents. Epson america, inc. You must then return or destroy the information, as directed by Seiko Epson. Page 3 To assure the safe operation of this product, carefully observe the specifications as well as the notes provided below. Seiko Epson Corporation will not bear any responsibility for any damage or injuries arising from use of this product that is not in accordance with the specifications and the notes provided below.

Page 4: About This Manual This chapter contains repair levels, repair procedures, and troubleshooting. Chapter 6 Assembly and Disassembly This chapter contains assembly and disassembly for the units and modules of the EU-T Appendix The appendix contains the exploded and adhesive diagrams of the EU-T Symbols Notes in this manual are identified by their level of importance, as defined below.

Table 1. Operation is 5 10 guaranteed. Page Chapter 2 Operation Principles Chapter 2 Operation Principles Outline of Mechanism The EU-T consists of four modules: the paper roll supply module, the printer module, the cut sheet presenter module, and the control circuit board module.

Paper Roll Supply Module The paper roll supply module holds a large diameter paper roll and guides the paper to the printer module. The paper roll holding section consists of the removable shaft, roll paper, the holder, roll paper A for the inner diameter of the paper core: The printer consists of the following six mechanisms: the drive force transmission mechanism, the paper feed mechanism, the printing mechanism, the paper guide mechanism, the detector mechanism, and the autocutter mechanism.

Page Paper Feed Mechanism Confidential This printer uses a 4-phase bi-polar stepping motor driven by 24 V voltage controlled phase excitation. The maximum drive frequency of phase excitation is pps.

Paper feed mechanism The paper feed mechanism consists of the platen paper feed roller and the thermal head. Excluding when using semi-autoloading mode.

Page Printing Mechanism Confidential Printing Mechanism This mechanism consists of the thermal head which has the head heating elements arranged in a series and has a driver IC for controlling voltage to the head heating elements, the platen which is also used for the paper feed mechanism as well as this mechanism the thermal head is also used for both mechanisms , and the spring, press head. Page 18 Confidential EU-T Technical Manual Data input and printing The thermal head consists of the head heating elements, the head driver, which controls or drives the head heating elements, and the thermistor, which detects the temperature of the thermal head.

The paper path consists of the paper guide, straight, front and the paper guide, straight, back. The paper path is shown below. Page 20 Confidential EU-T Technical Manual The transparent photo sensor is in a high state HI when the paper is present, and in a low state LOW when the paper is not present because the lever, paper detector blocks light to the sensor. When the end of the thermal paper passes through the paper guide, the lever, paper detector operates as shown in Figure Page 21 Confidential Platen-open detector mechanism The platen-open detector mechanism has a microswitch which detects whether the platen is open printing impossible because the thermal head is away from the platen or closed printing possible.

The microswitch can be OFF only when the frame, platen is perfectly closed, and at all other times is ON. The changes in reflectivity between the pre-printed black marks and blank areas of the thermal paper cause the amount of light returning to the sensor to vary; then the sensor output level is also varied as shown in Figure Page 23 Confidential Movable cutter blade mechanism This mechanism is mounted on the frame, base.

The drive force transmission mechanism is on the cover, cutter side. The motor, cutter is a DC brush motor on the gear, cutter motor. It supplies the power and is attached on the cover, cutter with screws.

Page 24 Confidential EU-T Technical Manual Autocutting operation The autocutter will operate when the frame platen unit is closed and a paper is loaded. The frame platen unit can be closed when the movable cutter blade, full is in the standby position. Page 25 Confidential Note: If the movable cutter blade, full cannot be returned to the home position because of foreign matter locking the blade when powered by the motor, rotate the knob on the gear, cutter worm with a tool such as a ball-point pen or tweezers to move the movable cutter blade, full to the home position.

The window on the cover, cutter can be used to check if the movable cutter blade, full has returned to the home position.

Figure Appearance of cut sheet presenter module Paper Feeding Operation With a Loop A paper feeding operation is performed at the same time with the start of the paper feeding of the printer module.

Page 27 Confidential While the tip of the paper sent from the printer module is in the standby state between the roller, presenter and the roller, cutting paper hold, the paper is continuously fed from the printer module. The paper pushes up the paper guide, upper and temporarily forms a loop. Page Control Circuit Board Module Confidential Control Circuit Board Module The control circuit board module controls all functions of each module and has the interface connectors and the power supply terminals.

Each function can be set by using the DIP switches and the memory switches. Remove the paper roll when transporting the EU-T Make sure to close the paper roll supply module, the platen unit of the printer module, and the cut sheet presenter module when transporting. Page Installation Precautions 15 minutes for them to cool. Since the EU-T contains permanent magnets in the motor as well as electromagnets, they should not be used in an environment with excessive dirt, dust, or metallic dust.

Page 37 15 minutes for them to cool. Since the EU-T contains permanent magnets as well as electromagnets in the motor, they should not be used in an environment with excessive dirt, dust and metallic dust. Page Storage Precautions Do not store the printer in environments with excessive dust, high temperature, high humidity, or in direct sunlight.

Before storing the EU-T for an extended time, remove the paper and wipe off dirt and dust; then clean parts such as the platen and the thermal head of the printer module with alcohol. Put your fingers on the top and bottom of the cut sheet presenter module; then pull the module up at an angle in the direction of arrow B to slide it.

See Figure on page Loading paper for the paper roll supply module 1. Turn the paper roll supply module back to its original position until it is locked by the frame open lever with a click sound. Then turn it back so that the plate, paper guide is not deformed. Page 42 Confidential Loading paper for printer module Follow the steps below to load the paper for the printer module from the paper roll supply module.

Cut the edge of the paper as shown below. Figure Shape of paper edge 2. Open the cut sheet presenter module. Turn the lever, platen to open the platen unit and remove the jammed paper. By adjusting the position of the detector, the detector can detect the amount remaining on the paper roll at the setting value.

Follow the steps below to perform the self tests. Performing the Self Test 1. With the paper loaded, turn on the power while holding down the FEED button on the panel switch. Page Chapter 4 Maintenance Confidential EU-T Technical Manual Chapter 4 Maintenance To keep the printer in peak working condition, extend its life for a long term, and prevent operational failures, follow the maintenance procedures below.

Page Removing Stains Except For The Thermal Head Confidential Removing Stains Except for the Thermal Head The areas where the paper is fed will be stained or collect dust after printing for a long time because of paper dust and heat sensitive materials contained in the paper. Especially, if paper feed rollers, the platen, or the paper detectors are not clean, a malfunction in paper feeding or paper detection may occur. Maintenance and inspection procedures should be carried out by properly qualified personnel.

Page Lubrication The lubricants for the printer are chosen based on technical information analysis and tests on various lubricants by EPSON. The lubricants are available in 40 cc gr. Both G and G are used on this printer. The person who repairs the printer should perform the proper repair procedures, depending on the individual technical knowledge and skills. Page Troubleshooting Confidential Troubleshooting Use troubleshooting procedures in the table below when problems occur. All printing color is Change the setting Printing density faint.

Disassembly of the modules beyond the level show in the exploded diagrams at the end of this manual may result in damage to the modules and their functions. Assembly The assembly process is divided into pre-assembly and main assembly.

Paper guide, straight, back paper detector P-tite M2. A Assembly and Disassembly Lubricate the point where the frame assembly contacts with the lock lever assembly with G Frame, platen, straight unit, Install the frame, platen, straight unit, B to the frame assembly. Make sure not to deform the spring, lever. S-tite M2. Make sure that the lead wires of the paper detector assembly and the paper detector assembly are passed under the plate, pressure spring.

Make sure that the cable, head is inserted securely Cable, printer Insert the cable, printer in the connector on the circuit board assembly. At this C. Page 96 Confidential Reassembly Part name Assembly procedure step Roll paper holder R Attach the spring, roll paper holder to the roll paper holder R assembly or assembly for a 6 inch roll paper holder R assembly, B.

Take out the connector of the lead wire, NE detector trough the round hole on the frame. E from the Spring, cutting paper hold Page Confidential Reassembly Part name Assembly procedure step Insulating tape consumable Fold the cable, printer and fix it with a 70 mm long insulating tape.

Page Confidential Reassembly Part name Assembly procedure step Connect the NE detector assembly, the cut sheet presenter module, the power supply connector assembly, and the LED switch circuit board assembly to the connectors on the control circuit board module. At this time, pass the lead wire, presenter on the notch on the cover, circuit board lower.

G G Rev. A Appendix G 3. G 6. G 2.


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