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TSC TTP 246M Service Manual

Thermal transfer/direct thermal bar code printer
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TTP 246M/344M
THERMAL TRANSFER / DIRECT THERMAL
BAR CODE PRINTER
SERVICE
MANUAL

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Summary of Contents for TSC TTP 246M

  • Page 1 TTP 246M/344M THERMAL TRANSFER / DIRECT THERMAL BAR CODE PRINTER SERVICE MANUAL...

  • Page 2: Table Of Contents

    TTP-246M/344M Bar Code Printer Service Manua TABLE OF CONTENT 1. Foundamentals About the System ................1 1.1Printer Overview ......................1 1.1.1 Front View ......................1 1.1.2 Rear View ......................1 1.2 Pinter Specification ....................2 1.3 Available Bar Codes ....................4 2.
  • Page 3 TTP-246M/344M Bar Code Printer Service Manua 4.6 Replacing Ribbon Supply Spindle ................35 4.7 Replacing Label Supply Spindle ................37 4.8 Replacing Platen ....................39 4.9 Replacing Stepping Motor ..................41 4.10 Replacing Print Head ................... 42 4.11 Replacing Print Head Adjustment Knob ..............43 4.12 Replacing Gap / Black Mark Sensor ..............

  • Page 4: Foundamentals About The System

    TTP-246M/344M Bar Code Printer Service Manua 1. FOUNDAMENTALS ABOUT THE SYSTEM 1.1Printer Overview 1.1.1 Front View Aux. LED Printer Right Side Cover LCD Display Keys Fig. 1.1 Printer Front View 1.1.2 Rear View External Label Feed Opening Centronics Port RS-232C Port Power Switch Power Supply Connector...

  • Page 5: Pinter Specification

    TTP-246M/344M Bar Code Printer Service Manua 1.2 Pinter Specification Item Specification Printing Mode Thermal transfer and direct thermal Resolution 203DPI(TTP246M), 300 DPI (TTP344M) Max. Print Length 1000 mm (TTP246M), 460 mm (TTP344M) Max. Print Width 108 mm (TTP246M), 104 mm (TTP344M) Print Speed 3,4,5,6 ips (TTP246M);...
  • Page 6 TTP-246M/344M Bar Code Printer Service Manua Communication Interface RS-232C (DB-9) at 2400, 4800, 9600 or 19200 baud Communication rate Word Length 7 or 8 data bits, 1 or 2 stop bits, selectable parity Communication Protocol XON/XOFF and DSR/DTR Parallel Port Standard parallel interface Input Buffer 10KB...

  • Page 7: Available Bar Codes

    TTP-246M/344M Bar Code Printer Service Manua Mini-DIN PCB JP20 connector Pin 5 Pin 1, brown Pin 6 Pin 2, red Pin 7 Pin 3, orange Pin 8 Pin 4, yellow 1.3 Available Bar Codes  Code 39  Code 39C ...

  • Page 8: Supply Specifications

    TTP-246M/344M Bar Code Printer Service Manua 2. SUPPLY SPECIFICATIONS 2.1 Label Specification Item Specification Roll and label (Continuous, die-cut, fan-fold, ticket and Type tag is option) 25.4～116 mm ( 1”～4.4” ) Label Width TTP-246M 10～1000 mm ( 0.4”～39.33” ) Label Length TTP-344M 10~460 mm (0.4”~18”) 0.06～0.25 mm Label Thickness...
  • Page 9 TTP-246M/344M Bar Code Printer Service Manua L = Ribbon length D = Max. roll diameter d = Ribbon core outside diameter t = Ribbon thickness...

  • Page 10: Circuit Description

    TTP-246M/344M Bar Code Printer Service Manua 3. CIRCUIT DESCRIPTION 3.1 PCB Function The mainboard of TTP-344M/246M includes nine system blocks. Memory System Sensor System Decoder System RTC, EEPROM, LCD System Print Head Connector System Motor System Power System USB System Communication Port...
  • Page 11 TTP-246M/344M Bar Code Printer Service Manua The figure below shows the PCB system areas: Memory Communication Sensor System Port System RTC, EPROM , LCD Print Head Connector Decoder Power Motor System System System Fig.3.1 System Block of PCB...

  • Page 12: Mcu Pin Description

    TTP-246M/344M Bar Code Printer Service Manua 3.2 MCU PIN Description A. The Function is follow 40-0220001-02 PCB version. Port High Function Instruction PD0~PD15 I/O Data D0~D15 Data bus PC0~PC15 O Address A0~A15 Address bus PB0~PB1 Address A16~A17 Address bus PB6~PB9 Address A18~A21 Address bus Active /RAS DRAM control signal...
  • Page 13 TTP-246M/344M Bar Code Printer Service Manua TIOC2A Ribbon Near End Sensor Enable PE7 LED 3 (L3) TIOC3A Paper Near End Sensor EEPROM SDO&SDI PE10 Enable PE10 EEPROM Chip Select PE11 PE11 EEPROM Clock PE12 PE12 USB Suspend PE13 Enable PE13 Pause Key PE14 Enable PE14...

  • Page 14: Reset Circuit

    TTP-246M/344M Bar Code Printer Service Manua 3.3 Reset Circuit This is reset circuit. The 80846 is voltage detecting IC. It can detect the voltage while the voltage is up to 4.6V；its output signal is high. 3.4 Memory Circuit There are 2MB DRAM and 2MB flash ROM on board. JP7 is memory card connector.

  • Page 15: Decoder Circuit And Memory Map

    TTP-246M/344M Bar Code Printer Service Manua 3.5 Decoder Circuit and Memory Map The CPLD is used to decode the memory and other function. Please refer to the memory map below.
  • Page 16 TTP-246M/344M Bar Code Printer Service Manua Memory Map...
  • Page 17 TTP-246M/344M Bar Code Printer Service Manua Definition of other decode function...

  • Page 18: Print Head Circuit

    TTP-246M/344M Bar Code Printer Service Manua 3.6 Print Head Circuit STB1, and STB2 are the print head heating signal. There is a limit for RC heating time of U15 (74HC123), it can avoid the print head over-heating. U26 is used to protect print head and avoid the current appears in the improper time.

  • Page 19: Motor Circuit

    TTP-246M/344M Bar Code Printer Service Manua 3.7 Motor Circuit This is motor circuit. U12 and U13 are drivers to control the bipolar stepping motor by using full step control method 3.8 Cutter Circuit...

  • Page 20: Parallel Port Circuit

    TTP-246M/344M Bar Code Printer Service Manua U15B (74HC123) controls the breaking of U14. U14 is the driver of cutter’s DC motor. 3.9 Parallel Port Circuit Centronics port is SPP mode and one-way communication. 3.10 Serial Port Circuit U18 (SP232A) is RS232 asynchronous communication driver IC. U19 is used for industrial long-distance asynchronous communication；U19 is optional for RS-422/485.

  • Page 21: Usb Circuit

    TTP-246M/344M Bar Code Printer Service Manua 3.11 USB Circuit This is USB circuit. This is standard USB1.1. 3.11.1 Gap/Black Mark sensor 1. The gap sensor is see-through sensor with 32 levels. 2. Black mark sensor is reflective sensor with 32 levels. 3.

  • Page 22: Case Open Sensor

    TTP-246M/344M Bar Code Printer Service Manua 3.11.2 Case Open Sensor This is case open sensor circuit. Case open sensor is a see-through sensor. The case opens when the CASE SENS signal is low; the case closes when the CASE SENS signal is high. 3.11.3 Ribbon End Sensor Ribbon end sensor is a see-through sensor.

  • Page 23: Head Open Sensor

    TTP-246M/344M Bar Code Printer Service Manua 3.11.4 Head Open Sensor This is the see-through sensor. The HEAD SENS signal is "High" when print head opens; The HEAD SENS signal is "Low" when the print head closes. 3.11.5 Peel-off Sensor This is a reflective sensor. The PEEL SENS signal is high when there is label below the sensor;...

  • Page 24: Summary Of Pcb Connectors

    TTP-246M/344M Bar Code Printer Service Manua 3.12 Summary of PCB connectors Connector Description Remark CPLD JTAG connector For CPLD program update Boot memory load jumper Reserved Reserved Power connector Memory card connector LCD module connector Stepping motor connector JP10 Cutter module connector JP11 TPH connector JP12...

  • Page 25: Ttp-246M & 344M Pcb Top Side

    TTP-246M/344M Bar Code Printer Service Manua 3.12.1 TTP-246M & 344M PCB Top Side JP22 JP17 JP18 JP19 JP37 JP20 JP23 JP21 JP12 JP33 JP34 JP11 JP15 JP16 JP36 JP10 JP13 JP36 Cutter Driver IC 3953...

  • Page 26: Ttp-246M & 344M Pcb Bottom Side

    TTP-246M/344M Bar Code Printer Service Manua 3.12.2 TTP-246M & 344M PCB Bottom Side Stepping Motor Driver IC...

  • Page 27: Mechanism

    TTP-246M/344M Bar Code Printer Service Manua 4. Mechanism 4.1 Remove Covers, LCD Panel and Lower Front Panel 1. Open Top Right Side Cover. Top Right Side Cover 2. Loosen four screws to separate the Top Right Side Cover and Main Frame. Screws Screws...
  • Page 28 TTP-246M/344M Bar Code Printer Service Manua 3. Remove Top Right Side Cover. 4. Loosen three screws to separate Main Frame and Left Side Cover. Screws...
  • Page 29 TTP-246M/344M Bar Code Printer Service Manua Loosen screws on Top Left Side Cover. Top Left Side Cover 6. Remove Left Side Cover. 7. Loosen two screws to separate the LCD panel and Main Frame, remove the connector from LCD panel, and then remove LCD panel. Screws...
  • Page 30 TTP-246M/344M Bar Code Printer Service Manua Loosen four screws and then remove Lower Front Cover. Screws Screws Lower front cover Reassemble in the reverse procedures.

  • Page 31: Replacing The All Harness On Main Pcb

    TTP-246M/344M Bar Code Printer Service Manua 4.2 Replacing the All Harness on Main PCB Disconnect the printer power cord. Refer to section 4.1 to remove the left side cover. Disconnect all harness. Remove screws on Mainboard and replace the Main PCB. Main PCB Reassemble in the reverse procedures.

  • Page 32: Replacing Power Supply Unit

    TTP-246M/344M Bar Code Printer Service Manua 4.3 Replacing Power Supply Unit 1. Disconnect the printer power cord. 2. Refer to section 4.1 to remove the left side cover. 3. The left side (face to power switch) harness of power switch is red, and the right side harness is black.

  • Page 33: Replacing Belt And Gears

    TTP-246M/344M Bar Code Printer Service Manua 4.4 Replacing Belt and Gears 1. Turn off the power. 2. Use left hand to pull the belt, use right hand to turn the gear to your right side in the same time to remove the belt completely. Gear Pulley 3.
  • Page 34 TTP-246M/344M Bar Code Printer Service Manua 1.5 mm wrench 2 black Inner hexagon bolt head 5. Remove the belts. 6. Remove the outer E-ring of the spindle. Then move the pulley. outer E-ring of the Ribbon rewind spindle 7. Remove the outer E-ring of the Ribbon rewind spindle. Then move the gear.
  • Page 35 TTP-246M/344M Bar Code Printer Service Manua The outer E-ring of the Ribbon rewind spindle Ribbon Rewind Spindle 8. Reassemble in the reverse procedures after replacing.

  • Page 36: Replacing Ribbon Rewind Spindle

    TTP-246M/344M Bar Code Printer Service Manua 4.5 Replacing Ribbon Rewind Spindle 1. Refer to section 4.1 to remove the left side cover. 2. Refer to section 4.4 to remove the belt, Pulley and gear. Gear Pulley Belt 3. Remove the 3 screws. Then, Remove Ribbon Rewind Spindle. Ribbon Rewind Screws Spindle...
  • Page 37 TTP-246M/344M Bar Code Printer Service Manua Ribbon Rewind Spindle 4. Reassemble in the reverse procedures after replacing.

  • Page 38: Replacing Ribbon Supply Spindle

    TTP-246M/344M Bar Code Printer Service Manua 4.6 Replacing Ribbon Supply Spindle Refer to section 4.1 to remove the left side cover. Remove the screw through the hole of the pulley. Then, remove other 4 screws of Ribbon supply spindle. Screw The hole of the pulley Screw...
  • Page 39 TTP-246M/344M Bar Code Printer Service Manua Ribbon supply spindle Reassemble in the reverse procedures after replacing.

  • Page 40: Replacing Label Supply Spindle

    TTP-246M/344M Bar Code Printer Service Manua 4.7 Replacing Label Supply Spindle 1. Refer to section 4.2 to remove the Main PCB. 2. Remove the 4 screws from the label roll fixing plate. screws screws 3. Remove the 3 screws these are used to connect the label supply spindle onto the main frame.
  • Page 41 TTP-246M/344M Bar Code Printer Service Manua 4. Remove the Label Supply Spindle. Label Supply Spindle 5. Reassemble in the reverse procedures after replacing.

  • Page 42: Replacing Platen

    TTP-246M/344M Bar Code Printer Service Manua 4.8 Replacing Platen Remove Print head lift lever latch and Platen Support Plate. Platen Support Plate Print head lift lever latch Loosen the 2 screws on the Aluminum-made Pulley. Aluminum-made Pulley Screw...
  • Page 43 TTP-246M/344M Bar Code Printer Service Manua Pull the platen to the right side. Remove the left and right shaft bearing on the Platen. Platen bearing shaft Install the bearing on the new Platen. Reassemble in the reverse procedures after replacing.

  • Page 44: Replacing Stepping Motor

    TTP-246M/344M Bar Code Printer Service Manua 4.9 Replacing Stepping Motor Remove Stopper and loosen two screws of Holder. Stopper Screws Holder Refer to section 4.4 to remove Belts and Holder. Loosen four fixing screws on the Motor. Scre Scre Remove stepping motor harness from Main PCB.

  • Page 45: Replacing Print Head

    TTP-246M/344M Bar Code Printer Service Manua Stepping motor Use 1.5mm hex wrench to remove the2 screws on the stepping motor pulley and 2 screws on the stopping. Reassemble in the reverse procedures after replacing. 4.10 Replacing Print Head Must turn off power while replacing print head, otherwise the damage of print head may occur.

  • Page 46: Replacing Print Head Adjustment Knob

    TTP-246M/344M Bar Code Printer Service Manua Note: In case if the screws were stripped, do not fix new print head with used screws. Reassemble in the reverse procedures after replacing. 4.11 Replacing Print Head Adjustment Knob Lift the print head up. Remove the Nut from the Print Head Lift Lever.
  • Page 47 TTP-246M/344M Bar Code Printer Service Manua Remove these 2 screws Remove the 4 screws these are on the Right Side Fixing Plate, Right Side Fixing Plate, and then, remove the Print Head Adjustment Knob assembly. screws screws Remove A.B.C.D in order. Loosen M4 screw, knob, E and F...

  • Page 48: Replacing Gap / Black Mark Sensor

    TTP-246M/344M Bar Code Printer Service Manua M4 screw Knob Reassemble in the reverse procedures after replacing. 4.12 Replacing Gap / Black Mark Sensor 1. Disconnect Gap/Black Mark Sensor harness from Main PCB. 2. Remove the 2 screws these are connected the Gap/Black Mark sensor and plate. Screws 3.
  • Page 49 TTP-246M/344M Bar Code Printer Service Manua Screws 4. Remove the screw on the main frame. The Gap/Black Mark Sensor assembly is separated into upper part and lower part. Screw 5. Pull the upper part to the left side through the hole, place the upper part upside down, pull the lower part to the right side first, and then, pull out the upper part.
  • Page 50 TTP-246M/344M Bar Code Printer Service Manua Upper part of Gap/Black mark sensor assembly Lower part of Gap/Black mark sensor assembly 6. Reassemble in the reverse procedures after replacing.

  • Page 51: Replacing Ribbon Sensor

    TTP-246M/344M Bar Code Printer Service Manua 4.13 Replacing Ribbon Sensor Use the screwdriver through the hole horizontally to remove the upper screw of Ribbon Sensor. Hole Screwdriver Remove the lower screw of Ribbon sensor. Ribbon Sensor Lower screw of Ribbon sensor...
  • Page 52 TTP-246M/344M Bar Code Printer Service Manua Remove the curly plastic pipe that covers some harness on the left side plate. curly plastic pipe Disconnect the JP17 connector from the main board. JP17 Reassemble in the reverse procedures after replacing.

  • Page 53: Replacing Print Head Lift Sensor

    TTP-246M/344M Bar Code Printer Service Manua 4.14 Replacing Print Head Lift Sensor Open the Top Left Side Cover. Remove the Curly plastic pipe, and pull out the harness. Disconnect all harness of Print Head Lift Lever Sensor. Remove the 2 screws of Print Head Lift Lever Sensor.

  • Page 54: Replacing Internal Print Server Module

    TTP-246M/344M Bar Code Printer Service Manua 4.15 Replacing Internal Print Server Module Open the Top Left Side Cover. Use tool to break the reserved hole for installing the Internal Print Server Module. Internal Print Server Module Break the reserved hole...
  • Page 55 TTP-246M/344M Bar Code Printer Service Manua Install the Internal Print Server Module, and screw the 2 screws to connect the Internal Print Server Module onto the back plate. Screws Remove the centronic harness on PCB JP12 connector. Connect internal print server centronics harness to main PCB JP12.
  • Page 56 TTP-246M/344M Bar Code Printer Service Manua 2-Pin white connector at JP37 Reassemble in the reverse procedures after replacing.

  • Page 57: Peeler Kit Installation (Option)

    TTP-246M/344M Bar Code Printer Service Manua 4.16 Peeler Kit Installation (Option)  Checklist: Peel off roller Peel off sensor assembly Peel off roller Peel off roller left side bush right side bush Left side spring leaf Right side spring leaf Washer Screw Open the lower front panel and the printer right side cover.
  • Page 58 TTP-246M/344M Bar Code Printer Service Manua There is a notch near by the platen roller bearing. Notch for peel off roller left side bush Notch for peel off roller right side bush Insert the peel off roller left side bush to the notch at the middle plate and insert the peel off roller right side bush to the notch at the right frame.
  • Page 59 TTP-246M/344M Bar Code Printer Service Manua Insert the left side first. Right side Left side Bush location Bush location...
  • Page 60 TTP-246M/344M Bar Code Printer Service Manua Fasten the leaf springs and washers with screws to fix the left and right side bush. Washer is placed between leaf spring and screw.
  • Page 61 TTP-246M/344M Bar Code Printer Service Manua Left side leaf spring Right side leaf spring Screw Screw Hook the peel-off sensor on the bar which is near by the peel off sensor connector. Plug in the peel-off sensor assembly to the connector. Peel-off sensor assembly connector Print head pressure...
  • Page 62 TTP-246M/344M Bar Code Printer Service Manua Plug in the peel-off sensor assembly to the connector.

  • Page 63: Loading Label For Peel-Off Mode

    TTP-246M/344M Bar Code Printer Service Manua 4.17 Loading Label For Peel-off Mode Open the Print Head Lift Lever. The message “CARRIAGE OPEN” will be shown on the LCD screen, and the RED LED is on. The LCD panel shown as below. Print Head Lift Lever Remove the first one label from the liner.
  • Page 64 TTP-246M/344M Bar Code Printer Service Manua Liner Peel-off roller Press the button (MENU, SELECT) under the message “Fwd.” to feed the label forward a little bit. Press the button (PAUSE, EXE./INC.) under the message “Rev.” to reverse the label if it is necessary for adjusting the label. Pull the liner outward tightly. Close the Print Head Lift Lever.
  • Page 65 TTP-246M/344M Bar Code Printer Service Manua Label Liner...

  • Page 66: Cutter Module Installation (Option)

    TTP-246M/344M Bar Code Printer Service Manua 4.18 Cutter Module Installation (Option) Remove the 2 screws of the peel-off panel and uninstall the peel-off panel if it is installed in the front panel. Plug the mini DIN cable into the socket of the cutter connector. Install the cutter module.

  • Page 67: Power On Utilities

    TTP-246M/344M Bar Code Printer Service Manua 5. POWER ON UTILITIES 5.1 Calibrate Gap/Black Mark Sensor 1. Gap/Black Mark Sensor Calibration This utility is used to calibrate the sensitivity of the gap/black mark sensor. The gap/black mark sensor should be calibrated whenever changing the label media or executing printer initialization.

  • Page 68: Printer Initialization

    TTP-246M/344M Bar Code Printer Service Manua 12. Memory available 5.3 Printer Initialization Printer Initialization will restore printer settings to defaults. Default settings are listed as below. Property Saved Cleared by Item Default Value when Turning off Initialization Power Mileage Check Sum Serial Port 9600,n,8,1 Code Page...
  • Page 69 TTP-246M/344M Bar Code Printer Service Manua Aux. LED Aux. Buzzer Download Files Please follow the steps below to initialize the printer: 1. Turn off the printer power. 2. Hold down the PAUSE and FEED buttons and turn on the printer power. 3.

  • Page 70: Troubleshooting

    TTP-246M/344M Bar Code Printer Service Manua 6. TROUBLESHOOTING The following guide lists the most common problems that may be encountered when operating this bar code printer. If the printer still does not function after all suggested solutions have been invoked, please contact the Customer Service Department of your purchased reseller or distributor for assistance.
  • Page 71 TTP-246M/344M Bar Code Printer Service Manua 2. Labels may be stuck in gap/black mark sensor. side print mechanism. 2. Remove the stuck label. Carriage open The printer carriage is open. Please close the print carriage. The space of FLASH/DRAM Delete unused files in the Memory full ( FLASH / DRAM ) is full.

  • Page 72: Maintenance

    TTP-246M/344M Bar Code Printer Service Manua 7. MAINTENANCE This session presents the clean tools and methods to maintain your printer. Use one or more of the following supplies that meets your needs:  Cleaning pens  Cleaning swabs  Lint-free cloth. The cleaning process is described as following Printer Part Method...

  • Page 73: Update History

    1. Modify 5-3 item 11 : External Ethernet print s© er Camille (C) part no. 2007/4/12 1. Modify 5-2 accessible parts ll drawing Camille 2007/4/14 1. Update TSC e-mail address Camille 2007/5/31 1. Update printer Initialization section Camille 2007/6/13 1. Update Power supply unit part no. from...
  • Page 74 External Ethe© t print server (C)/EU, 98-1000019-00LF External Ethernet print server (Z)/US, 98-1000020-00LF External Ethernet print server (Z)/EU, 98-1000011-00LF External w© less print server (C)/US and 98-1000012-00LF Externa© ireless print server (C)/EU 2008/6/30 Remove the parts list section Camille 2011/1/25 Modify TSC address Camille...
  • Page 75 9F., No.95, Minquan Rd., Xindian Dist., No.35, Sec. 2, Ligong 1st Rd., Wujie Township, New Taipei City 23141, Taiwan (R.O.C.) Yilan County 26841, Taiwan (R.O.C.) TEL: +886-2-2218-6789 TEL: +886-3-990-6677 FAX: +886-2-2218-5678 FAX: +886-3-990-5577 Web site: www.tscprinters.com E-mail: printer_sales@tscprinters.com TSC Auto ID Technology Co., Ltd. tech_support@tscprinters.com...

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