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TSC DH240 Series Service Manual

Desktop barcode printer, direct thermal
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Desktop Barcode Printer
DH240 Series
Direct Thermal
Series Models
DH240T / DH340T
DH240THC / DH340THC
Service Manual
www.tscprinters.com

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Summary of Contents for TSC DH240 Series

  • Page 1 Desktop Barcode Printer DH240 Series Direct Thermal Series Models DH240T / DH340T DH240THC / DH340THC Service Manual www.tscprinters.com...
  • Page 2 All other trademarks are the property of their respective owners. Information in this document is subject to change without notice and does not represent a commitment on the part of TSC Auto ID Technology Co. No part of this manual may be reproduced or transmitted in any form or by any means, for any purpose other than the purchaser’s personal use, without the expressed written...

  • Page 3: Table Of Contents

    Contents Introduction ..............................3 Printer Features ................................4 Electronics ..............................7 Main Board Connectors ..............................7 Interface Pin Configuration ............................. 19 Replacing the Parts............................. 21 Before You Begin ................................21 Replacing the Platen Roller Assembly ..........................22 Replacing the Printhead Cover with Upper Black Mark Sensor Assembly ..............24 Replacing the Printhead Assembly ..........................
  • Page 4 Troubleshooting ............................62 Common Problems ................................. 62 Maintenance ..............................67 Cleaning Supplies ................................68 Cleaning Procedures ..............................69 Revision History ..............................70...

  • Page 5: Introduction

    Connect), printer shutdown prevention, and supports network security configurations to manage printers efficiently. The DH240 Series scales up applications with a wide media width, high-precision printing, and several addable future-proof options. This empowers businesses to adapt to changing requirements for present and future operations. The eco-friendly printer features 100% recyclable packaging and plastic printer casing.

  • Page 6: Printer Features

    1.1 Printer Features Front View Media viewer window Operating buttons Cover lever microSD card slot Power switch...
  • Page 7 Interior View Printhead Printhead cover Upper black mark sensor Media holder Platen roller Front panel cover Media holder lock Black mark sensor...
  • Page 8 Rear View Power jack USB interface USB host RS-232C interface Ethernet LAN port...

  • Page 9: Electronics

    2 Electronics 2.1 Main Board Connectors Power supply output (24V DC) connector System reset switch USB device connector USB host connector RS-232C connector Ethernet connector ESD cable connector Panel touch and key connector LCD connector TPH connector Micro SD card connector Black mark sensor connector for print side (transmitter) Black mark sensor connector for print side (receiver) Buzzer...
  • Page 10 Function Pin Definition Power supply output (24V DC) connector Definition DCIN 24V System reset switch (for resetting RTC or when printer hangs) Definition Vbattery VDDBU reset signal USB device connector Definition...
  • Page 11 Function Pin Definition USB host connector Definition VBUS 5V RS-232C connector Definition VBUS 5V...
  • Page 12 Function Pin Definition Ethernet connector Definition FGND 3.3V Green LED Control Yellow LED Control 3.3V ESD cable connector Definition Panel touch and key connector Definition 3.3V KEY_SDA KEY_SCL KEY_INT TOUCH_INT...
  • Page 13 Function Pin Definition LCD connector Definition 3.3V 3.3V 3.3V LCD_BL LCD_D/CX LCD_D0 LCD_D1 LCD_D2 LCD_D3 LCD_D4 LCD_D5 LCD_D6 LCD_D7 LCD_NCS LCD_RESET LCD_WE...
  • Page 14 Function Pin Definition TPH connector Definition TPH 24V TPH 24V TPH 24V TPH 24V Strobe2 Data2 TPH ID Temperature sensor Strobe1 Clock Data1 Latch TPH 24V TPH 24V TPH 24V TPH 24V...
  • Page 15 Function Pin Definition Micro SD card connector Definition Micro_SD_DATA1 Micro_SD_DATA0 Micro_SD_CLK 3.3V Micro_SD_CMD Micro_SD_DATA3 Micro_SD_DATA2 Micro_SD_DT...
  • Page 16 Function Pin Definition Definition 3.3V NFC_TWD NFC_TWCK NFC_RTS NFC_CTS NFC_UPDATE Black mark sensor connector for print side (transmitter) Definition 3.3V Black Mark Sensor for Print Side (transmitter) Black mark sensor connector for print side (receiver) Definition Black Mark Sensor for Print Side (receiver)
  • Page 17 Function Pin Definition Buzzer Definition SYS 24V Buzzer control Black mark sensor connector Definition Black Mark Sensor Receiver Black Mark Sensor Emitter 3.3V Coin battery connector Definition Vbattery...
  • Page 18 Function Pin Definition Cutter / Peeler / RFID connector Definition CRFID_RXD CRFID_TXD 5V_RFID Peeler_TWD Peeler sensor receiver 5V_Cutter Peeler_TWCK Cutter rotate direction Cutter enable signal Cutter status...
  • Page 19 Function Pin Definition Wi-Fi & Bluetooth connector Definition 3.3V_WIFI WIFI/BT_Detect WIFI_RX0 WIFI_RX1 WIFI_RXDV WIFI_REFCK WIFI_WAKEUP WIFI_TXEN WIFI_TX0 WIFI_TX1 BT_TXD BT_CTS BT_RXD BT_RTS 3.3V_WIFI WIFI_RESET Stepping motor connector Pin No. Definition BOUT2 BOUT1 AOUT1 AOUT2...
  • Page 20 Function Pin Definition Head open connector Pin No. Definition Head open sensor (receiver) Power switch connector Pin No. Definition EN_24V SW_24V...

  • Page 21: Interface Pin Configuration

    Interface Pin Configuration Function Pin Configuration USB device Configuration USB host Configuration RS-232C Configuration...
  • Page 22 Function Pin Configuration Ethernet LAN port Definition...

  • Page 23: Replacing The Parts

    3 Replacing the Parts 3.1 Before You Begin WARNING: To avoid the risk of personal injury from electrical shock, before performing any replacement procedures, unplug the power cord from the printer or power outlet to ensure that power is removed. To prepare the printer for the replacement or installation: 1.

  • Page 24: Replacing The Platen Roller Assembly

    3.2 Replacing the Platen Roller Assembly 1. Follow the steps in Before You Begin to prepare the printer. 2. Pull the two release latches on the right and left sides of the printer to release the top cover and then open the top cover. 3.
  • Page 25 5. Lift up to remove the platen roller assembly. 6. Reverse the steps to install the platen roller assembly. Note: The image below indicates the default position for the two tabs of the platen roller.

  • Page 26: Replacing The Printhead Cover With Upper Black Mark Sensor Assembly

    3.3 Replacing the Printhead Cover with Upper Black Mark Sensor Assembly CAUTION: To prevent electrostatic damage to the electronic components, touch the unpainted part of the printer chassis to ground yourself before the replacement procedures. 1. Follow the steps in Before You Begin to prepare the printer.
  • Page 27 5. Disconnect the cable from the upper reflective sensor board to remove the printhead cover with upper black mark sensor assembly. Upper Reflective Sensor Board Printhead Cover with Upper Black Mark Sensor Assembly 6. Reverse the steps to install the printhead cover with upper black mark sensor assembly.

  • Page 28: Replacing The Printhead Assembly

    3.4 Replacing the Printhead Assembly CAUTION: To prevent electrostatic damage to the electronic components, touch the unpainted part of the frame to ground yourself before the replacement procedures. 1. Follow the steps in Before You Begin to prepare the printer. 2.
  • Page 29 5. Disconnect the green ground cable and printhead cable from the printhead assembly. CAUTION: DO NOT touch the printhead throughout the replacement procedures. Oils from your hand may damage the printhead. Ground Cable Connector Printhead Cable Connector Printhead Assembly 6. Reverse the steps to install the printhead assembly.

  • Page 30: Replacing The Top Cover

    3.5 Replacing the Top Cover 1. Follow the steps in Before You Begin to prepare the printer. 2. Open the top cover. For how to open the top cover, refer to Replacing the Platen Roller Assembly. 3. Remove the four screws securing the top cover in place. 4.

  • Page 31: Replacing The Control Panel Assembly

    3.6 Replacing the Control Panel Assembly 1. Follow the steps in Before You Begin to prepare the printer. 2. Open the top cover. For how to open the top cover, refer to Replacing the Platen Roller Assembly. 3. Remove the top cover. For how to remove the top cover, refer to Replacing the Top Cover.
  • Page 32 5. Flip over the control panel board. Carefully push the two black tabs in the indicated direction to unlock the white FFC and disconnect the FFC from the control panel board 6. Carefully flip up the tab to unlock the control panel FPC.
  • Page 33 7. Remove the keypad and then carefully detach the control panel with its bracket from the control panel board. Keypad Control Panel Board Control Panel with its Bracket Note: For models shipped with the LCD display and wireless or Bluetooth module, when replacing the control panel assembly, the NFC tag MUST be transferred to the new control panel assembly.

  • Page 34: Replacing The Rtc Module

    3.7 Replacing the RTC Module 1. Follow the steps in Before You Begin to prepare the printer. 2. Remove the single screw securing the RTC module cover in place. 3. Disconnect the RTC battery cable from the main board.
  • Page 35 Note: For models shipped either with a wireless or Bluetooth module, you need to disconnect its corresponding cable from the main board before removing the RTC module cover from the printer. Wireless or Bluetooth Module Connector 4. Pull the latch in the indicated direction to release the RTC battery from its compartment. Note: The RTC module kit you purchase will not come equipped with the RTC battery (CR2032).

  • Page 36: Replacing The Lower Cover

    3.8 Replacing the Lower Cover 1. Follow the steps in Before You Begin to prepare the printer. 2. Remove the RTC battery cover. For how to remove the RTC battery cover, refer to Replacing the RTC Module. 3. Disconnect the power switch cable from the main board. 4.
  • Page 37 5. Remove the four screws securing the lower cover in place. Lower Cover 6. Reverse the steps to install the lower cover.

  • Page 38: Replacing The Main Board

    3.9 Replacing the Main Board 1. Follow the steps in Before You Begin to prepare the printer. 2. Remove the RTC module. For how to remove the RTC module, refer to Replacing the RTC Module. 3. Remove the lower cover. For how to remove the lower cover, refer to Replacing the Lower Cover.

  • Page 39: Replacing The Sd Card Board

    3.10 Replacing the SD Card Board 1. Follow the steps in Before You Begin to prepare the printer. 2. Remove the RTC module. For how to remove the RTC module, refer to Replacing the RTC Module. 3. Remove the lower cover. For how to remove the lower cover, refer to Replacing the Lower Cover.

  • Page 40: Replacing The Stepping Motor

    3.11 Replacing the Stepping Motor 1. Follow the steps in Before You Begin to prepare the printer. 2. Remove the RTC module. For how to remove the RTC module, refer to Replacing the RTC Module. 3. Remove the lower cover. For how to remove the lower cover, refer to Replacing the Lower Cover.

  • Page 41: Replacing The Black Mark Sensor

    3.12 Replacing the Black Mark Sensor 1. Follow the steps in Before You Begin to prepare the printer. 2. Remove the RTC module. For how to remove the RTC module, refer to Replacing the RTC Module. 3. Remove the lower cover. For how to remove the lower cover, refer to Replacing the Lower Cover.
  • Page 42 6. Flip over the black mylar and then remove the single screw securing the black mark sensor in place. 7. Remove the black mark sensor with its cable from the top side of the printer. Black Mark Sensor 8. Reverse the steps to install the stepping motor.

  • Page 43: Replacing The Head Open Sensor

    3.13 Replacing the Head Open Sensor 1. Follow the steps in Before You Begin to prepare the printer. 2. Remove the RTC module. For how to remove the RTC module, refer to Replacing the RTC Module. 3. Remove the lower cover. For how to remove the lower cover, refer to Replacing the Lower Cover.

  • Page 44: Replacing The Hook Assembly

    3.14 Replacing the Hook Assembly 1. Follow the steps in Before You Begin to prepare the printer. 2. Remove the top cover. For how to remove the top cover, refer to Replacing the Top Cover. 3. Remove the control panel assembly. For how to remove the control panel assembly, refer to Replacing the Control Panel Assembly.
  • Page 45 6. Release the two springs from their rib on the chassis and then remove the hook assembly from the printer. Hook Assembly 7. Reverse the steps to install the hook assembly.

  • Page 46: Replacing The Media Holder

    3.15 Replacing the Media Holder 1. Follow the steps in Before You Begin to prepare the printer. 2. Remove the RTC module. For how to remove the RTC module, refer to Replacing the RTC Module. 3. Remove the lower cover. For how to remove the lower cover, refer to Replacing the Lower Cover.
  • Page 47 7. Remove the two screws securing the left media holder in place and then remove the left media holder. 8. Reverse the steps to install the left media holder. 9. Repeat the same steps to replace the other media holder if necessary.

  • Page 48: Installing The Cutter Module

    3.16 Installing the Cutter Module 1. Follow the steps in Before You Begin to prepare the printer. 2. Open the top cover. For how to open the top cover, refer to Replacing the Platen Roller Assembly. 3. Remove the lower front panel. 4.
  • Page 49 5. Press down to install the module ensuring that the ribs on the module are correctly inserted into the indicated openings. NOTE: Make sure that the cable is completely threaded through and is not pressed throughout the installation process. 6. Remove the single screw securing the RTC module cover in place and then open the cover. Connect the cutter module’s cable to the connector on the main board.

  • Page 50: Installing The Peel-Off Module

    3.17 Installing the Peel-off Module 1. Follow the steps in Before You Begin to prepare the printer. 2. Open the top cover. For how to open the top cover, refer to Replacing the Platen Roller Assembly. 3. Remove the lower front panel. 4.
  • Page 51 5. Thread the module’s cable through the opening on the front side of the printer. 6. Press down to install the module ensuring that the ribs on the module are correctly inserted into the indicated openings.
  • Page 52 7. Close the peel roller. 8. Remove the single screw securing the RTC module cover in place and then open the cover.
  • Page 53 9. Connect the module’s cable to the connector on the main board. 10. Reassemble the RTC module cover and install the single screw to secure the cover in place.

  • Page 54: Installing The Wi-Fi / Bluetooth Module

    3.18 Installing the Wi-Fi / Bluetooth Module Wi-Fi Module Kit NFC Tag Note: This section demonstrates how to install the Wi-Fi module. The Wi-Fi Module same process is also applicable to the installation of Bluetooth module. Wi-Fi Cable 1. Follow the steps in Before You Begin to prepare the printer.
  • Page 55 4. Connect the RTC module cable and Wi-Fi module cable to the main board. Wi-Fi Module Connector RTC Module Connector 5. Install the single screw to secure the Wi-Fi module cover in place.
  • Page 56 6. Remove the top cover and then adhere the NFC tag onto the LCD panel bracket as indicated. 7. Re-install the top cover. 8. Reverse the steps to remove the Wi-Fi module.

  • Page 57: Installing The Narrow Media Adaptor

    3.19 Installing the Narrow Media Adaptor 1. Open the printer’s top cover and separate the media holders, then press down the media holder lock switch to fix the media holder. Remove the two screws on media holder as indicated to remove the two 3-inch cores. 2.
  • Page 58 3. Secure the two narrow media adapters inside the media guide with the two screws. Note that the narrow media adapters have a right and left side.

  • Page 59: Installing The Linerless Cutter Module / Linerless Tear Module

    3.20 Installing the Linerless Cutter Module / Linerless Tear Module NOTE: This section demonstrates how to install the linerless cutter module. The same process is also applicable to the installation of the linerless tear module. 1. Follow the steps in Before You Begin to prepare the printer.
  • Page 60 4. Rotate the two tabs for the platen roller assembly in the indicated direction to secure the linerless platen roller assembly in place. 5. Adhere the anti-stick rubber onto the printer ensuring that the anti-stick rubber is aligned with the rib located inside the chassis.
  • Page 61 6. Thread the linerless cutter module’s cable through the opening on the front side of the printer. 7. Press down to install the linerless cutter module ensuring that the ribs on the module are correctly inserted into the indicated openings.
  • Page 62 NOTE: The image below demonstrates the installation of the linerless tear module. 8. Remove the single screw securing the RTC module cover in place and then open the cover.
  • Page 63 9. Connect the linerless cutter module’s cable to the connector on the main board. NOTE: When installing the linerless tear module, connect the linerless tear module’s cable to the same connector on the main board. 10. Install the label tray onto the linerless cutter module. Linerless Tear Module...

  • Page 64: Troubleshooting

    4 Troubleshooting Common Problems Problem Possible Cause Recovery Procedure  Plug the power cord in printer and outlet. The power cord is not properly Power indicator/ LCD does not illuminate  Switch the printer on. connected. The printer head is open. Please close the print carriages.
  • Page 65 Problem Possible Cause Recovery Procedure then check the IP address setting again.  Please reset the wireless device setting.  Select the correct printer port in the driver.  Print head’s harness connector is not well connected with printhead. Turn off the printer and plug the connector again.
  • Page 66 Problem Possible Cause Recovery Procedure  SD card is damaged.  Use the supported capacity SD card.  SD card doesn’t insert correctly. SD card is unable to use  Insert the SD card again.  Use the non-approved SD card manufacturer.
  • Page 67 Problem Possible Cause Recovery Procedure  If the label is moving to the left side, please move the label guide to right.  Label size is not specified properly.  Check if label size is setup correctly.  Sensor sensitivity is not set ...
  • Page 68 Recovery Procedure  Calibrate the sensor sensitivity again.  Set the correct label size and gap size.  Enter LCD menu (or via TSC Console) to fine tune the parameter of Shift Y.  If using the software BarTender, please set the vertical offset in the driver.

  • Page 69: Maintenance

    5 Maintenance This session presents the clean tools and methods to maintain the printer. ◼ For Cleaning Depending on the media used, the printer may accumulate residues (media dust, adhesives, etc.) as a by-product of normal printing. To maintain the best printing quality, you should remove these residues by cleaning the printer periodically. Regularly clean the printhead and supply sensors once change a new media to keep the printer at the optimized performance and extend printer life.

  • Page 70: Cleaning Supplies

    5.1 Cleaning Supplies ◼ Cotton swab ◼ Lint-free cloth ◼ Brush with soft non-metallic bristles ◼ Vacuum cleaner ◼ 75% Ethanol (for disinfecting) ◼ 99% Isopropyl alcohol (for printhead and platen roller cleaning) ◼ Genuine printhead cleaning pen ◼ Mild detergent (without chlorine)

  • Page 71: Cleaning Procedures

    5.2 Cleaning Procedures Component Method Recommended Cleaning Schedcule Power off the printer before cleaning the printhead. Leave the printhead to cool down for at least one minute. Clean the printhead when you load new Printhead Wet a cotton swab with the 99% Isopropyl alcohol and then wipe across the media.

  • Page 72: Revision History

    History Revision Date Content Editor Added the “Installing the Narrow Media Adapter” section. 2023/09/06 Peter Yao ▪ Added the “Installing the Cutter Module” section. 2023/09/08 Peter Yao ▪ Replaced the images for the “Installing the Peel-off Module” section. Add the “Installing the Linerless Cutter Module / Linerless Tear Module” section. 2023/09/21 Peter Yao 2023/10/16...
  • Page 73 www.tscprinters.com...

This manual is also suitable for:

Dh240t seriesDh340t seriesDh240thc seriesDh340thc series

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