Seiko LTPD245D Technical Reference
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Seiko LTPD245D Technical Reference

Seiko LTPD245D Technical Reference

Thermal printer mechanism
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LTPD245D, LTPD345D
THERMAL PRINTER MECHANISM
TECHNICAL REFERENCE
U00111983500

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Summary of Contents for Seiko LTPD245D

  • Page 1 LTPD245D, LTPD345D THERMAL PRINTER MECHANISM TECHNICAL REFERENCE U00111983500...
  • Page 2 Copyright © 2008 by Seiko Instruments Inc. All rights reserved. Seiko Instruments Inc. (hereinafter referred to as “SII”) has prepared this technical reference for use by SII personnel, licensees, and customers. The information contained herein is the property of SII and shall not be reproduced in whole or in part without the prior written approval of SII.
  • Page 3 PREFACE This technical reference describes the specifications and basic operating procedures for the LTPD245D and LTPD345D thermal printer mechanism (hereinafter referred to as “printer”). The printers have the following models. • LTPD245D-384-E • LTPD345D-576-E This technical reference usually describes information common to any printer unless otherwise specified. If the information is different depending on models, specific model names are mentioned clearly.

  • Page 4: Table Of Contents

    TABLE OF CONTENTS CHAPTER 1 PRECAUTIONS SAFETY PRECAUTIONS....................1-2 DESIGN AND HANDLING PRECAUTIONS ..............1-3 1.2.1 Design Precautions ..................... 1-3 1.2.2 Handling Precautions ....................1-4 1.2.3 Precautions on Discarding ..................1-6 CHAPTER 2 FEATURES CHAPTER 3 SPECIFICATIONS GENERAL SPECIFICATIONS ..................3-1 HEAT ELEMENT DIMENSIONS ..................
  • Page 5 CONTROLLING THE ACTIVATION PULSE WIDTH FOR THERMAL HEAD....3-22 3.5.1 Calculation of Activation Pulse Width................ 3-22 3.5.2 Calculation of Printing Energy ................... 3-22 3.5.3 Adjustment of Thermal Head Resistance..............3-23 3.5.4 Adjustment of Thermal Head Drive Voltage .............. 3-23 3.5.5 Setting of Activation Pause Time ................
  • Page 6 CONNECT THE PRINTER TO FRAME GROUND (FG) ..........6-6 6.3.1 How to Connect the Printer to Frame Groung (FG) ............ 6-6 DESIGN THE PLATEN RELEASE LEVER ..............6-7 LAYOUT OF PRINTER AND THERMAL PAPER ............6-8 WHERE TO MOUNT THE PAPER HOLDER ..............6-9 DESIGN PAPER EXIT....................
  • Page 7 Timing Chart for Driving Using Six Divisions (LTPD245D) ..........5-2 Timing Chart for Driving Using One Division (LTPD245D) ..........5-2 Dimensions for Positioning and Securing the Printer Main Body (LTPD245D) ....6-2 Dimensions for Positioning and Securing the Printer Main Body (LTPD345D) ....6-2 Dimensions for Positioning and Securing the Platen Block ..........
  • Page 8 Temperature Characteristics ..................3-27 3-16 Out-of-paper Sensor ....................... 3-29 3-17 General Specifications of Platen Position Sensor ............3-30 Recommended Connectors....................4-1 Terminal Assignments of the Connecting Terminal (LTPD245D) ........4-2 Terminal Assignments of the Connecting Terminal (LTPD345D) ........4-4 Allowable Dimensions viii...
  • Page 9 CHAPTER 1 PRECAUTIONS Read through this technical reference to design a product and to operate the printer properly. Pay special attention to the precautions noted in each section for details. Information contained in this technical reference is subject to change without notice. For the latest information, contact our sales representative.

  • Page 10: Safety Precautions

    1.1 SAFETY PRECAUTIONS Follow the precautions listed below when designing a product using the printer. Include any necessary precautions into your operation manual and attach warning labels to your products to ensure safe operation. • Precautions to prevent the thermal head from overheating When the thermal head heat elements are continuously activated by a CPU or other malfunction, the thermal head may overheat and may cause smoke and fire.

  • Page 11: Design And Handling Precautions

    1.2 DESIGN AND HANDLING PRECAUTIONS To maintain the primary performance of the printer and to prevent future problems from occurring, follow the precautions below. 1.2.1 Design Precautions • Apply power in the following manner: At power on : 1) V →...

  • Page 12: Handling Precautions

    • Design the paper supply system in accordance with Chapter 6 “OUTER CASE DESIGN GUIDE”. When the paper supply position is improper, print difficulty or paper detection difficulty will be caused and the surface of thermal paper may get scratched. Verify the performance with your actual device.
  • Page 13 • In order to prevent the thermal head from damage and to avoid the print defect, warn the users not to touch the thermal head and the sensor directly when handling the printer like replacing thermal paper. • Never connect or disconnect the connecting terminal with the power on. •...

  • Page 14: Precautions On Discarding

    1.2.3 Precautions on Discarding When discarding used printers, discard them according to the disposal regulations and rules of each respective district.

  • Page 15: Features

    Available to print receipts and journals at the same time. • High resolution Printing A high-density print head of 8 dots/mm produces clear and precise printing. • Compact LTPD245D: Dimensions : W69.0mm x D30.0mm x H15.0mm Mass : approx. 40g...

  • Page 16: Specifications

    SPECIFICATIONS 3.1 GENERAL SPECIFICATIONS Table 3-1 lists the general specifications of the printer. Table 3-1 General Specifications (1/2) Specifications Items LTPD245D LTPD345D Printing method Thermal dot line printing Total dots per line 384 dots 576 dots Printable dots per line...
  • Page 17 (2/2) Specifications Items LTPD245D LTPD345D -10 to 50°C (Non condensing) 40℃85%RH 45℃64%RH 50℃52%RH Operating temperature and humidity range Temperature(℃） Storage temperature range -35 to75°C (Non condensing) Activation pulse NOTE(4) 100 million pulses or more Life span resistance (at 25°C and...

  • Page 18: Heat Element Dimensions

    21mm (168dots) 21mm (168dots) (48dots) Paper width　　In case of 28+28mm 48mm (384dots) 11mm (88dots) 31mm (248dots) (48dots) Paper width　　In case of 18+38mm 48mm (384dots) 31mm (248dots) 11mm (88dots) (48dots) Paper width　　In case of 38+18mm Figure 3-1 Heat Element Dimensions (LTPD245D)

  • Page 19: Print Area (Ltpd245D)

    11 mm(Printing width) 2 mm 【Print area】 　Paper width　　　In case of 18+38mm mm(Paper width) mm(Paper width) 5 mm 31 mm(Printing width) 5 mm 2 mm 11 mm(Printing width) 2 mm 【Print area】 　Paper width　　　In case of 38+18mm Figure 3-2 Print Area (LTPD245D)

  • Page 20: Heat Element Dimensions (Ltpd345D)

    Figure 3-3 shows heat element dimensions. Figure 3-4 shows print area. 72mm（576dots） 0.125mm 0.125mm Base 72mm（576dots） 32mm (256dots) 32mm (256dots) (64dots) Paper width　　In case of 38+38mm 72mm（576dots） 22mm (176dots) 42mm (336dots) (64dots) Paper width　　In case of 28+48mm 72mm（576dots） 42mm (336dots) 22mm (176dots) (64dots) Paper width　　In case of 48+28mm...

  • Page 21: Print Area (Ltpd345D)

    mm（Paper width） 4 mm 72 mm（Printing width） 4 mm 【Print area】 　Base mm(Paper width) 38 mm(Paper width) 4 mm 4 mm 2 mm 32 mm(Printing width) 32 mm(Printing width) 2 mm 【Print area】 　Paper width　　　In case of 38+38mm mm(Paper width) mm(Paper width) 4 mm 42 mm(Printing width)

  • Page 22: Step Motor

    3.3 STEP MOTOR 3.3.1 General Specifications Table 3-2 shows general specifications of the step motor. Table 3-2 General Specifications of the Step Motor Specifications Item LTPD245D LTPD345D Type PM type step motor Drive method Bi-polar chopper Excitation 1-2 phase 12Ω/phase ±10%...

  • Page 23: Sample Drive Circuit

    3.3.2 Sample Drive Circuit A sample drive circuit for the motor is shown in Figure 3-5. FUSE BD6380EFV 0.1μF 47μF Printer IN1A OUT1A IN2A OUT2A IN1B OUT1B IN2B OUT2B MCL1 0.5Ω 1% VREF RNF1 47kΩ 0.125W 0.1μF SENSE1 VLIM1 9.1kΩ±1% 0.5Ω...

  • Page 24: Excitation Sequence

    3.3.3 Excitation Sequence Drive the motor with 1-2 phase excitation. One step of the motor drive signal feeds the paper 0.03125 mm. One dot line is consisted of 4 steps. When the voltage signal shown in Figure 3-6 is input to the motor drive circuit shown in Figure 3-5, the printer feeds the paper in the normal direction when the motor is excited in order of step 1, step 2, step 3, step 4, step 5, step 6, step7, step 8, step 1, step 2, .

  • Page 25: Motor Start/Stop Method

    3.3.4 Motor Start/Stop Method Refer to the timing chart in Figure 3-7 when designing the control circuit or software for starting and stopping the motor. Also note the following precautions: (1) Start step To start the motor from the pause (no excitation) state, shift the motor to the sequence of print step after exciting the same phase as that of the stop step for the first acceleration step time (5000μs) of the acceleration step.

  • Page 26: Motor Drive Method

    　 　 　 (pps) Maximum motor drive pulse rate at V (pps) However, LTPD245D: 3200pps max. and LTPD345D: 2560pps max. Motor drive voltage (V) Table 3-4 Maximum Motor Drive Pulse Rate Maximum motor drive pulse rate LTPD245D LTPD345D 4.75 V...
  • Page 27 For the next step time after reducing the speed, output the “n”th acceleration step time that should be shorter than the previous step time and should be the biggest. (ex) In the case of Figure 3-5, if the previous step time is 900µs, the next step should be the 10th acceleration step (880µs). Hereinafter, accelerate the speed sequentially up to the maximum motor drive pulse rate P according to Table 3-5 and Table 3-6.
  • Page 28 Table 3-5 Acceleration Steps（LTPD245D） Number of Speed Step Time Number of Speed Step Time Steps (pps) (μs) Steps (pps) (μs) Start 5000 2274 3707 2305 2291 2337 1769 2367 1485 2398 1302 2428 1172 2457 1074 2487 1004 2515 1072...
  • Page 29 Table 3-6 Acceleration Steps（LTPD345D） Number of Speed Step Time Number of Speed Step Time Steps (pps) (μs) Steps (pps) (μs) Start 5000 1819 4634 1844 2864 1869 2211 1894 1856 1918 1627 1942 1465 1966 1342 1989 1245 2012 1166 2035 1100 2058...

  • Page 30: Maximum Drive Time And Drive Ratio

    (3) Preventing Overheat To prevent the motor from overheating, the drive time and drive ratio are limited. Follow the Table 3-7 shown below to set an operating time and a pause time of the motor. Table 3-7 Maximum Drive Time and Drive Ratio Maximum Motor drive voltage V Drive pulse rate...

  • Page 31: Motor Drive Precautions

    3.3.6 Motor Drive Precautions • Using the motor drive circuit other than the circuit shown in "Section 3.3.2 Sample Drive Circuit" may not ensure the specified efficiency. • To prevent degradation in the print quality due to the backlash of the paper drive system, feed the paper for 48 steps or more at the initialization, at a time after setting/releasing the platen block, and a time after cutting with a paper cutter.

  • Page 32: Thermal Head

    DST signal "High" in accordance with the stored print data. In the LTPD245D, a division printing by 6 blocks is available. Each block has 64 dots heat elements. In the LTPD345D at 7.9V or lower, a division printing by 64 dots in 1 block and 128 dots in 4 blocks each are available.

  • Page 33: Print Position Of The Data

    3.4.2 Print Position of the Data The following describes the print position of the data as an example of the LTPD245D. 384-bit data (#1 to #384) transferred through DI terminals are printed when driving the LTPD245D as shown in Figure 3-9.

  • Page 34: Electrical Characteristics Of Thermal Head

    3.4.3 Electrical Characteristics of Thermal Head Table 3-10 and Table 3-11 show electrical characteristics of thermal head. Table 3-10 Electrical Characteristics of Thermal Head (LTPD245D) (at 25 °C) Rated value Item Symbol Conditions Unit Thermal head 166.0 173.0 180.0 Ω...

  • Page 35: Electrical Characteristics Of Thermal Head (Ltpd345D)

    Table 3-11 Electrical Characteristics of Thermal Head (LTPD345D) (at 25 °C ) Rated value Item Symbol Conditions Unit Thermal head 168.9 176.0 183.1 Ω heat element resistance Thermal Head 4.75 drive voltage Thermal Head at the number of simultaneously activated dots = 96 drive current Logic voltage 5.25...

  • Page 36: Timing Chart

    Also, allowable current for the cable material and the voltage drop on the cable should be cared well. Equation (2): × Maximum current consumption (A) Number of simultaneously activated dots (logical block) Thermal head drive voltage (V) Minimum thermal head heat element resistance H min 166.0 (Ω) (LTPD245D) 168.9 (Ω) (LTPD345D) 3-21...

  • Page 37: Controlling The Activation Pulse Width For Thermal Head

    3.5 CONTROLLING THE ACTIVATION PULSE WIDTH FOR THERMAL HEAD To execute high quality printing using the printer, the activation pulse width according to printer use condition must be used. Control printing with the activation pulse width calculated by the following sequence. Printing at too high voltage or too long activation pulse width may shorten the life of the thermal head.

  • Page 38: Adjustment Of Thermal Head Resistance

    The adjusted resistance “R” can be calculated using equation (5) to adjust the thermal head resistance as a voltage drop is caused by wiring resistance. Equation (5): × ) Thermal head heat element resistance 173.0(Ω)(LTPD245D) 176.0(Ω)(LTPD345D) Wiring resistance in the thermal head 9 (Ω) Common terminal wiring resistance in the thermal head 0.20 (Ω)

  • Page 39: Calculation Sample For The Activation Pulse Width

    3.5.7 Calculation Sample for the Activation Pulse Width Table 3-14 lists the calculation samples of the activation pulse width calculated using equation (3) and the values obtained using equations (4) to (6) and (8). Table 3-14 Activation Pulse Width (1/2) Unit : ms Motor drive pulse rate [pps] [°C]...
  • Page 40 (2/2) Unit : ms Motor drive pulse rate [pps] [°C] 1000 1200 1400 1600 1800 2000 2200 2400 2600 2800 3000 3200 1.031 0.940 0.869 0.810 0.762 0.721 0.686 0.656 0.629 0.606 0.585 0.567 0.551 0.536 0.522 0.944 0.861 0.795 0.742 0.698 0.660...

  • Page 41: Temperature Characteristics Of Thermistor

    3.5.8 Temperature Characteristics of Thermistor Calculate the resistance of the thermistor (R ) at the operating temperature T (°C) using the following equation (9). Variation of resistance by temperature is shown in Figure 3-11 and Table 3-15. Equation (9): × ×...

  • Page 42: Temperature Characteristics

    Table 3-15 Temperature Characteristics Thermistor Temperature (°C) Resistance (kΩ) 316.97 234.22 175.07 132.29 100.99 77.85 60.57 47.53 37.61 30.00 24.11 19.51 15.89 13.03 10.75 8.92 7.45 6.25 5.27 4.47 3.80 3.25 2.79 2.41 2.09 3-27...

  • Page 43: Detecting Abnormal Temperature Of The Thermal Head

    3.5.9 Detecting Abnormal Temperature of the Thermal Head To protect the thermal head and to ensure personal safety, abnormal temperature of the thermal head must be detected by both hardware and software as follows: (1) Detecting abnormal temperatures by software Design software that will deactivate the heat elements if the thermal head thermistor (TH) detects a ≦...

  • Page 44: Out-Of-Paper Sensor

    3.6 OUT-OF-PAPER SENSOR The printer has a built-in out-of-paper sensor (reflection type photo interrupter) to detect whether paper is present or not. An external circuit should be designed so that it detects output from the out-of-paper sensor and does not activate the thermal head and motor when there is no paper. Doing not so may cause damage to the thermal head or platen roller or shorten the life of the thermal head significantly.

  • Page 45: Platen Position Sensor

    3.7 PLATEN POSITION SENSOR The printer has a built-in platen position sensor for detecting whether the platen block is set or released. This sensor is a mechanical switch which is designed to be on when the platen block is set and to be off when it is released.

  • Page 46: Connecting Terminals

    CHAPTER 4 CONNECTING TERMINALS 4.1 RECOMMENDED CONNECTOR FOR EXTERNAL CIRCUITS Use the recommended connectors listed in Table 4-1 to connect the printer connecting terminals firmly to the external circuits. Table 4-1 Recommended Connectors Number of Recommended Connectors Terminals MOLEX INC: 54104-5031 (right angle, top contact, gold plated) 4.2 CONNECTING TERMINALS Figure 4-1 shows the terminal configuration of the connecting terminals and Table 4-2 and Table 4-3 show...

  • Page 47: Terminal Assignments Of The Connecting Terminal (Ltpd245D)

    Table 4-2 Terminal Assignments of the Connecting Terminal（LTPD245D） （1/2） Terminal Signal Description Number Name Thermal head drive voltage Thermal head drive voltage Thermal head drive voltage Thermal head drive voltage Thermal head drive voltage Thermal head drive voltage Print data input (serial input)
  • Page 48 (2/2) Terminal Signal Description Number Name Print data latch (memory holding) Thermal head drive power Thermal head drive power Thermal head drive power Thermal head drive power Thermal head drive power Thermal head drive power Power supply of the paper sensor 2 (LED anode) Output signal of the paper sensor (Photo-transistor collector) Power supply of the paper sensor 1 (LED anode) GND of the paper sensor (LED cathode, photo-transistor emitter)

  • Page 49: Terminal Assignments Of The Connecting Terminal (Ltpd345D)

    Table 4-3 Terminal Assignments of the Connecting Terminal（LTPD345D） （1/2） Terminal Signal Description Number Name Thermal head drive power Thermal head drive power Thermal head drive power Thermal head drive power Thermal head drive power Thermal head drive power Print data input (serial input) Synchronizing signal for print data transfer N.C.
  • Page 50 （2/2） Terminal Signal Description Number Name Print data latch (memory storage) Thermal head drive voltage Thermal head drive voltage Thermal head drive voltage Thermal head drive power Thermal head drive power Thermal head drive power Power supply of the paper sensor 2 (LED anode) Output signal of the paper sensor (Photo-transistor collector) Power supply of the paper sensor 1 (LED anode) GND of the paper sensor (LED cathode, photo-transistor emitter)

  • Page 51: Print Drive Method

    In order to print one dot line, feed the thermal paper for four steps and activate the thermal head in every two step. The following describes the drive method as an example of the LTPD245D. Figure 5-1 shows a timing chart for driving using six division printing.

  • Page 52: Timing Chart For Driving Using Six Divisions (Ltpd245D)

    4th step MCL1 DST1 DST2 DST3 DST4 DST5 DST6 Figure 5-1 Timing Chart for Driving Using Six Divisions (LTPD245D) 1st dot line 1st dot line 1st dot line 1st dot line 2nd dot line 2nd dot line 2nd dot line...
  • Page 53 The drive method using six divisions is explained below (See Figure 5-1): (1) Pause state Inactivate the motor and always make DST signal of the thermal head "Low". Synchronizing to the CLK signal, transfer the print data of the 1st dot line to the “SHIFT REGISTER” from the DI terminal. (2) Start step Excite the motor by the same phase which is output just before the motor stops.

  • Page 54: Thermal Head Division Drive Method

    5.2 THERMAL HEAD DIVISION DRIVE METHOD In the thermal head of the printer, there are 6 blocks (every 64 dots) in 1 dot line for LTPD245D. There are 5 blocks (4 blocks are divided every 128 dots and 1 block is divided 64dots) in 1 dot line for LTPD345D. These blocks are called physical blocks.

  • Page 55: Precautions For Print Drive

    • The number of the maximum thermal head division in a half dot line should be 6 or lower for LTPD245D and 9 or lower for LTPD345D to maintain print quality. The number of the simultaneously activated dots should be 96 dots or less. (Up to 128 dots are available if the V...

  • Page 56: Outer Case Design Guide

    CHAPTER 6 OUTER CASE DESIGN GUIDE 6.1 SECURING THE PRINTER MAIN BODY 6.1.1 How to Mount the Printer Main Body Figure 6-1and Figure 6-2 show dimensions for positioning and securing the printer main body. • Holes #1 and #2 must be used for positioning the printer main body. Design bosses on the outer case to position the printer main body for the positioning holes #1 and #2.

  • Page 57: Dimensions For Positioning And Securing The Printer Main Body (Ltpd245D)

    Outer case for printer main body mounting Unit : mm : ±0.1 General tolerance Figure 6-1 Dimensions for Positioning and Securing the Printer Main Body (LTPD245D) Paper center 19.15 29.75 ±0.5 51.65 ±0.5 Outer case for printer main body mouting...

  • Page 58: Recommended Screws

    6.1.2 Recommended Screws M2 cross-recessed pan head screw 6.1.3 Precautions for Securing the Printer Main Body • Prevent from excessive stress, deformation, and torsion for securing the printer, otherwise poor printing quality, paper skewing, paper jamming, and noise during printing may be caused. •...

  • Page 59: Securing The Platen Block

    1.5mm (Max.) • Secure the platen block using the screw holes d and e. The shaded area is the position of Platen Block rotation center. 5.85 (X dimension） 10.7 LTPD245D (A:34, B:28) LTPD345D (A:56, B:50) Unit : mm General tolerance : ±0.1...

  • Page 60: Recommended Screws

    6.2.2 Recommended Screw M2.5 cross-recessed pan head screw 6.2.3 Precautions for Securing the Platen Block • Design the door on which the platen block is mounted, rotation system of the door and mounting position of the platen block on the door so that X and Y dimensions as shown in Figure 6-3 are within the allowable dimensions as shown in Table 6-1.

  • Page 61: Connect The Printer To Frame Ground (Fg)

    6.3 CONNECT THE PRINTER TO FRAME GROUND (FG) To prevent the thermal head from being damaged by static electricity, it is recommended that the printer is connected to frame ground (FG). 6.3.1 How to Connect the Printer to Frame Ground (FG) •...

  • Page 62: Design The Platen Release Lever

    6.4 DESIGN THE PLATEN RELEASE LEVER Figure 6-4 shows dimensions of the release lever and its movement when the platen release lever is released. When designing the button or the lever that will operate simultaneously with the platen release lever, follow the precautions below.

  • Page 63: Layout Of Printer And Thermal Paper

    6.5 LAYOUT OF THE PRINTER AND THERMAL PAPER The printer mechanism can be laid out as shown in Figure 6-5 according to the loading direction of the thermal paper. Platen Thermal head heat elements Thermal head Printer mechanism Paper roll Printer mounting plate Out-of-paper sensor Figure 6-5 Recommended Layout between the Printer and the Thermal Paper...

  • Page 64: Where To Mount The Paper Holder

    Printer main body mounting surface Position bosses for Printer main body 1.5 (MAX) +0.1 21.35 Paper center Guide for the paper ＋0.2 Ａ 　　0 Unit : mm General tolerance : ±0.1 LTPD245D (A:59) LTPD345D (A:81) Figure 6-6 Recommended Paper Holder Dimensions...

  • Page 65: Recommended Separator (Ltpd245D)

    <Parting position B> <Parting position C> 　Paper width 　Paper width 　Paper width 　In case of 28+28mm 　In case of 18+38mm 　In case of 38+18mm Figure 6-7 Recommended Separator (LTPD245D) Parting section Parting section Parting section +0.1 +0.1 +0.1 +0.1 +0.1 +0.1...

  • Page 66: Design Paper Exit

    6.7 DESIGN PAPER EXIT 6.7.1 Design the Shape of the Paper Exit When designing the shape of the paper exit, note the followings. • Design the shape of the paper exit so that stress is not applied to the thermal paper that comes out. •...

  • Page 67: Design The Paper Cutter

    6.7.2 Design the Paper Cutter • Design paper cutter mounting position so the edge of the cutter blade does not touch with a platen block when the platen block is set and released. • Use a well-cut cutter so that the thermal paper can be cut with less force than paper holding force. •...

  • Page 68: Precautions For Designing The Outer Case

    6.8 PRECAUTIONS FOR DESIGNING THE OUTER CASE • The thermal paper with a small winding diameter may cause the paper jam in the printer main body and a gap between the printer mechanism and the outer case. If using such a thermal paper with the small diameter, verify the performance with your actual device.

  • Page 69: External Dimensions

    CHAPTER 7 EXTERNAL DIMENSIONS Figure 7-1 shows external dimensions of the platen block for LTPD245D and Figure 7-2 shows external dimensions of the printer LTPD245D. Figure 7-3 shows external dimensions of the platen block for LTPD345D and Figure 7-4 shows external...

  • Page 70: External Dimensions Of The Platen Block (Ltpd245D)

    2.1 ±0.05 (Range of platen motion) Unit : mm General tolerance for dimensions : ± 0.5 Figure 7-1 External Dimensions of the Platen Block (LTPD245D)

  • Page 71: External Dimensions Of The Printer (Ltpd245D)

    3.8 ±0.1 2.1 ±0.05 9.5 ±0.2 1.6 ±0.05 27.5 2.65 1.48 (Paper Inlet position) 37 ±3 39.95 38.7 0.8 ±0.04 4.54 M2 burring Unit : mm : ±0.5 General tolerance Figure 7-2 External Dimensions of the Printer (LTPD245D)

  • Page 72: External Dimensions Of The Platen Block (Ltpd345D)

    2.1 ±0.05 (Range of platen motion) Unit : mm : ±0.5 General tolerance Figure 7-3 External Dimensions of the Platen Block (LTPD345D)

  • Page 73: External Dimensions Of The Printer (Ltpd345D)

    3.8 ±0.1 2.1 ±0.05 9.5 ±0.2 1.6 ±0.05 27.5 2.65 1.48 (Paper Inlet Position) 37 ±3 39.95 38.7 4.54 0.8 ±0.04 M2 burring Unit : mm : ±0.5 General tolerance Figure 7-4 External Dimensions of the Printer (LTPD345D)

  • Page 74: Handling Method

    CHAPTER 8 HANDLING METHOD 8.1 PROCEDURES FOR INSTALLING/UNINSTALLING THE THERMAL PAPER 8.1.1 Procedures for Installing/Uninstalling the Thermal paper ① Installing the thermal paper • Push the platen release lever in the direction of the arrow in the Figure 8-1. Platen block Platen release lever Figure 8-1 Loading the Thermal Paper (1) •...

  • Page 75: Precautions For Installing The Thermal Paper

    Figure 8-2 Loading the Thermal Paper (2) • Set the platen block after making sure that the thermal paper is set straight. (Close state) ② Uninstall the thermal paper • Uninstall the thermal paper in the same manner for installing the thermal paper. ③...

  • Page 76: Procedures For Cleaning The Thermal Head

    8.2 PRECAUTIONS FOR CLEANING THE THERMAL HEAD If the surface of the thermal head exposed to dirt, ensure to clean the thermal head to avoid a print defect. 8.2.1 Procedures for Cleaning the Thermal Head • Turn off the power before cleaning. •...

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