TSC TTP-248M Service Manual
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TSC TTP-248M Service Manual

Bar code printer
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TTP 248M
THERMAL TRANSFER / DIRECT THERMAL
BAR CODE PRINTER
SERVICE
MANUAL

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Summary of Contents for TSC TTP-248M

  • Page 1 TTP 248M THERMAL TRANSFER / DIRECT THERMAL BAR CODE PRINTER SERVICE MANUAL...

  • Page 2: Table Of Contents

    TTP-248M Bar Code Printer Service Manua TABLE OF CONTENT 1. Foundamentals About the System ................1 Printer Overview ...................... 1 Front View ......................1 Rear View ......................1 1.2 Pinter Specification .................... 2 1.3 Available Bar Codes ..................4 1.4 Text Specification ....................5 Specification of Fonts ..................
  • Page 3 TTP-248M Bar Code Printer Service Manua 4.2 Replacing the Mainboard ................43 4.3 Replacing the Power Supply Unit ..............44 4.4 Replacing the Ribbon Rewind Spindle ............45 4.5 Replacing Ribbon Supply Spindle ..............48 4.6 Replacing Label Supply Spindle ..............50 4.7 Replacing Label Rewind Spindle ..............

  • Page 4: Foundamentals About The System

    TTP-248M Bar Code Printer Service Manua 1. FOUNDAMENTALS ABOUT THE SYSTEM Printer Overview Front View Aux. LED LCD Display Printer Cover Fig. 1.1 Printer Front View Rear View Aux. Buzzer Centronics Port External Label RS-232C Port Feed Opening Voltage Switch...

  • Page 5: Pinter Specification

    TTP-248M Bar Code Printer Service Manua 1.2 Pinter Specification Item Specification Printing Mode Thermal transfer and direct thermal Resolution 203 DPI Max. Print Length 999 mm Max. Print Width 104 mm Print Speed Selectable speed of 4,6,8 inch per second...
  • Page 6 TTP-248M Bar Code Printer Service Manua ROHM KF2004-GL41D 550Ω Mitsumi 24V 7.5 Degrees 4Ω Japan Servo KH56KM Stepping Motor 2u023 1.80,24V,0.36Ω SDRAM, 1M×16Brt×2 7ns Memory Flash Memory: (512K×16Bit) ×2 70ns Compliance CE, UL/CUL, BSMI, FCC Class A, TÜ V-GS Communication Interface...

  • Page 7: Available Bar Codes

    TTP-248M Bar Code Printer Service Manua  RS-232 Interface Pin Configuration: Host Printer 9 Pin 25 Pin 9 Pin Function Function 1.3 Available Bar Codes  Code 39  Code 39C  Code 93  Code128UCC  Code128 subsets A.B.C ...

  • Page 8: Text Specification

    TTP-248M Bar Code Printer Service Manua  EAN-14  ITF14  PDF-417  Maxicode  DataMatrix 1.4 Text Specification Font Width x Length Font 1 8x12 Font 2 12x20 Font 3 16x24 Font 4 24x32 Font 5 32x48 Font 6...

  • Page 9: File Head Of Font ( Fixed 32Bytes )

    TTP-248M Bar Code Printer Service Manua File Head of Font ( Fixed 32bytes ) Offset 0 B->Bitmap font Offset 1 0->Fixed pixel 1->Variable Pixel Offset 2 0->Singed Byte Decode 1->Double Byte Decode Offset 3 Decode by table Offset 4 0-> None 1->Italic...

  • Page 10: Bf3~4 Vf3~4

    TTP-248M Bar Code Printer Service Manua BF3~4 VF3~4 Decode Table (char low byte) (char high byte) (offset 4 bytes ==> file start to font data) The font with decade table, the previous two bytes of every word is the code of the word, and the later four bytes is the displacement from the file head to the position of the data of the word.

  • Page 11: Supply Specifications

    2.1 Types of Paper Two types of media are available for TTP-248M/2410M : label and ticket. In TTP-248M/2410M, there are two types of sensors for paper : gap sensor and black mark sensor. Label and ticket can be further classified into direct thermal type or thermal transfer type.

  • Page 12: Ribbon Specification

    TTP-248M Bar Code Printer Service Manua 2.3 Ribbon Specification Item Specification Ribbon Shape Spool type 25.4～114.3 mm Ribbon Width Ribbon Length 450 m Less than 3.5” ( 89 mm) Diameter Roll Up Method Print surface wound outside as standard. Note: The maximum length of ribbon depends on its thickness and core outside diameter.

  • Page 13: Circuit Description

    74 HC 1 4 G ND N M I Fig. 3.1 MCU Circuit Diagram The mainboard of TTP-248M/2410M includes seven system blocks: A. Memory System (decoder & memory block) B. Motor System (stepping motor, DC motor and cutter block) C. Print Head System D.
  • Page 14 TTP-248M Bar Code Printer Service Manua The figure below shows the PCB system area: Communication port Decoder Print System Head Connector External Memory Connector Memory Power System System Sensor Connector Motor System Option I/O Cutter System Fig. 3.2 System Block of PCB...

  • Page 15: Mcu Pin Description

    TTP-248M Bar Code Printer Service Manua 3.2 MCU PIN Description...
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  • Page 24: Reset Circuit

    TTP-248M Bar Code Printer Service Manua 3.3 Reset Circuit VCCL R130 10 K VCC3 /RST RESET 3. 0K VCC5 VCCA LTC1 72 8 3. 4K 0. 1uF 0. 1uF Fig. 3.3 Reset Circuit This is the reset circuit. The LTC1728IC detects three kinds of DC Voltage (5V, 3V and 1.9V).

  • Page 25: Memory System

    TTP-248M Bar Code Printer Service Manua 3.4 Memory System G ND C S0 C S2 C S3 A 10 A 11 A 12 A 13 A 14 A 15 A 16 A 17 A 18 A 19 A 20 A 21...

  • Page 26: Decoder Circuits

    TTP-248M Bar Code Printer Service Manua 3.5 Decoder Circuits USE CPLD to decode. 3.6 Memory Address Map (Privileged mode)
  • Page 27 TTP-248M Bar Code Printer Service Manua 0x00000000 2-Gbytes virtual space, Area P0 cacheable (write-back/write-through) 0x80000000 0.5-Gbytes fixed physical space, Area P1 cacheable (write-back / write-through) 0xA0000000 0.5-Gbytes fixed physical space, Area P2 non-cacheable 0xC0000000 0.5-Gbytes virtual space, Area P3 cacheable...
  • Page 28 TTP-248M Bar Code Printer Service Manua 0xA8100000 Ribbon Near End Data Register (1 byte) 0xA8200000 Centronics Data Register (1 byte) 0xA8300000 TPH Data Area 1 Register (1 byte) 0xA8400000 TPH Data Area 2 Register (1 byte) 0xA8500000 TPH Data Area 3 Register...

  • Page 29: Firmware Address Map

    TTP-248M Bar Code Printer Service Manua 3.7 Firmware Address Map (Cacheable Address Flash 1) 0x80000000 Boot Interrupt Vector Boot Area Initial Program (32 Kbytes) 0x80001FFF (Boot Project) 0x80002000 Update Firmware This program run (Boot Project) Program in 0x8C3F0000 0x80002FFF (Run in SDRAM)

  • Page 30: Power Down Sensor

    TTP-248M Bar Code Printer Service Manua 3.8 Power Down Sensor 1. 9V VCCL R118 R116 L1 8 L2 1 Ip k R117 33 0u Vref SS14 34 06 3 10 uF 10 0p 15 00 pF 0. 1u 47 0u 10 0u /35 V 1.

  • Page 31: Print Head

    TTP-248M Bar Code Printer Service Manua 3.9 Print Head JP18 A ROHM_ KF20 04_ GL41 A BC3 3 0. 1u F 74 HCT1 4 10 K 10 K 10 K 10 K /LAT 74 LS14 CONNECT BY VDD /LAT 74 HCT1 4...

  • Page 32: Motor System Circuit

    TTP-248M Bar Code Printer Service Manua 3.10 Motor System Circuit STEP PHASE INA_R /INA_R INB_R /INB_R Table 5. Stepping Motor Pattern 22 00 uF MGND 0. 1u F EN_MA EN_MB MGND MOTER_C BOOT1 L6 50 6D_SO 15 nF STEPPING_ MOTOR...

  • Page 33: Sensor Circuits

    TTP-248M Bar Code Printer Service Manua 3.11 Sensor Circuits Ribbon Near End Sensor The voltage of sender (PIN 3) is about 1.18V (1.17V~1.19V). When the sensor detects the black area, the voltage of receiver (PIN 2) is≧ 2.10V. When the sensor detects the white area, the voltage of the receiver (PIN 2) is≦...
  • Page 34 TTP-248M Bar Code Printer Service Manua between 4.4V~3.7V. 2. Selecting AUTO GAP to detect label will get a value of tension, and then selecting the MANUAL GAP. When sensor detects white paper: LCD displays Reflect  the voltage of receiver (PIN 3)≦2.10V When sensor detects the Black mark or does not detect paper: LCD displays Not Reflected ...
  • Page 35 TTP-248M Bar Code Printer Service Manua Fig. 3.11 Peel-off Sensor Circuit Case Sensor The voltage of sender is about 1.18V (1.17V~1.19V) When sensor detects upper cover, the voltage of receiver (PIN 2) is≧2.10V When sensor does not detect upper cover, the voltage of receiver is ≦1.26V...

  • Page 36: Serial Port Circuit

    TTP-248M Bar Code Printer Service Manua 2. Selecting AUTO RIBBON to detect ribbon will get a value of tension, and then selecting the MANUAL Ribbon. When sensor detects ribbon: LCD displays Not Through  the voltage of receiver (PIN 4)≦1.26V When sensor detects no ribbon: LCD displays Through ...

  • Page 37: Parallel Port Circuit

    TTP-248M Bar Code Printer Service Manua U19 is used for industrial long-distance asynchronous communication;U19 is optional. 3.13 Parallel Port Circuit PR8 10 K PR8 10 K PR7 10 K PR7 10 K PR6 10 K PR6 10 K PC1 22 0p PC2 22 0p PC3 22 0p...

  • Page 38: Cutter Drive System

    TTP-248M Bar Code Printer Service Manua 3.14 Cutter Drive System Fig. 3.17 Cutter Drive Circuit JP33Pin 2 and 4 connect DC motor; pin 3 connects sensor. Pin /BK Cutter is used to stop DC motor. PHASE is used to control obversion and reverse.

  • Page 39: Pin Switch Circuits

    TTP-248M Bar Code Printer Service Manua 3.15 PIN Switch Circuits JP28 JP3/9 JP3/1 開關 2PIN Fig. 3.18 LTC490 and RS232 pin switch 10 K JP27 U1/7 2PIN Fig. 3.19 Download boot program to on-board Flash memory pin switch 3.16 Connector Circuits JTAG Fig.
  • Page 40 TTP-248M Bar Code Printer Service Manua A[1.. 24] /RESET RESET U23/28 /WEO/DQMLL /OE&/RD 50 PIN_P2 D[0.. 15] Fig. 3.21 Memory Card Connector JP33 U11/15 U11/10 4PIN CTSENS CUTTER DIGITAL GND Fig. 3.22 Cutter Connector Circuit...
  • Page 41 TTP-248M Bar Code Printer Service Manua U13/6 STEPPING_ MOTOR OUT1 8. 2 JP14 U13/4 OUT2 0. 01u F 4PIN U12/6 R100 OUT1 8. 2 0. 01u F U12/4 OUT2 Fig. 3.23 Stepping Motor Connector...

  • Page 42: Optional Items Circuits

    TTP-248M Bar Code Printer Service Manua 3.17 Optional Items Circuits The following circuits provide optional detecting message or input/output control. R135 R136 0. 1uF 0. 1uF 10 0 10 0 AVCC JP25 AVCC JP26 1N41 48 1N41 48 1N41 48...

  • Page 43: Machanism

    TTP-248M Bar Code Printer Service Manua 4. MACHANISM 4.1 Remove the Covers and LCD Panel 1. Open Top Right Side Cover. 2. Loosen the four screws used to fix Main Frame and Top Right Side Cover. Screws...
  • Page 44 TTP-248M Bar Code Printer Service Manua Loosen the three screws on Top Left Side Cover. Screws 4. Remove Top Right Side Cover and Top Left Side Cover. 5. Remove the LCD Panel and remove the Lower Front Cover to the right side.
  • Page 45 TTP-248M Bar Code Printer Service Manua Screw LCD Panel Screw Lower Front Cover...

  • Page 46: Replacing The Mainboard

    TTP-248M Bar Code Printer Service Manua 4.2 Replacing the Mainboard 1. Disconnect all harnesses. 2. Remove the seven screws on Mainboard, two hexagon screws of serial port and two screws of parallel port. Mainboard Screw Screw Screw Screw Parallel Port...

  • Page 47: Replacing The Power Supply Unit

    TTP-248M Bar Code Printer Service Manua 4.3 Replacing the Power Supply Unit 1. Disconnect all harnesses. Power Supply Unit 2. Turn the printer upside down to loosen the two screws of the Power Supply Unit on the bottom of the printer.

  • Page 48: Replacing The Ribbon Rewind Spindle

    TTP-248M Bar Code Printer Service Manua 4.4 Replacing the Ribbon Rewind Spindle 1. Refer to 4.3 to remove the Power Supply Unit. 2. Remove the E-ring of the Label Rewind Spindle and the Label Rewind Spindle with belt. Belt E-ring of Label Rewind Spindle 3.
  • Page 49 TTP-248M Bar Code Printer Service Manua Screws Screws Pulley 4. Remove the E-ring of pulley. And then, remove the pulley. Pulley E-ring 5. Loosen the three screws on the Cam Spindle Support Plate.
  • Page 50 TTP-248M Bar Code Printer Service Manua Screws 6. Replace the Ribbon Rewind Spindle. 7. Reassemble in the reverse procedures after replacing.

  • Page 51: Replacing Ribbon Supply Spindle

    TTP-248M Bar Code Printer Service Manua 4.5 Replacing Ribbon Supply Spindle 1. Remove the four screws of the Ribbon Supply Spindle. Screws Screws 2. Remove the shaft bearing. 3. Replace the Ribbon Supply Spindle.
  • Page 52 TTP-248M Bar Code Printer Service Manua 4. Reassemble in the reverse procedures after replacing.

  • Page 53: Replacing Label Supply Spindle

    TTP-248M Bar Code Printer Service Manua 4.6 Replacing Label Supply Spindle 1. Refer to 4.2 to remove the Mainboard. 2. Remove the three screws of the Label Supply Spindle. Screws 3. Remove the four screws of the fixing plate. Screws Screws 4.
  • Page 54 TTP-248M Bar Code Printer Service Manua 5. Reassemble in the reverse procedures after replacing.

  • Page 55: Replacing Label Rewind Spindle

    TTP-248M Bar Code Printer Service Manua 4.7 Replacing Label Rewind Spindle 1. Refer to 4.3 to remove the Power Supply Unit. 2. Remove the E-ring and the pulley of the Label Rewind Spindle. E-ring 3. Remove the three screws of the Label Rewind Spindle.
  • Page 56 TTP-248M Bar Code Printer Service Manua Screws Screws 5. Replace the Label Rewind Spindle. 6. Reassemble in the reverse procedures after replacing.

  • Page 57: Replacing Platen

    TTP-248M Bar Code Printer Service Manua 4.8 Replacing Platen 1. Refer to 4.1 to remove the Top Right and Left Side Covers. 2. Release the Print Head Lift Lever. 3. Remove the screw and the Stripper/Rewind Plate. Print Head Lift...
  • Page 58 TTP-248M Bar Code Printer Service Manua Screws 6. Remove the Platen and Left Shaft Bearing. Left Shaft Bearing Platen 7. Reassemble in the reverse procedures after replacing.

  • Page 59: Replacing Motor

    TTP-248M Bar Code Printer Service Manua 4.9 Replacing Motor 1. Loosen the four fixing screws on the Motor. Screws Screws 2. Disconnect the harness from the Motor Disconnect the harness 3. Replace the Motor.
  • Page 60 TTP-248M Bar Code Printer Service Manua 4. Reassemble in the reverse procedures after replacing.

  • Page 61: Replacing Print Head

    TTP-248M Bar Code Printer Service Manua 4.10 Replacing Print Head 1. Remove the screws on the Print Head. Screw 2. Disconnect the two Printer Harnesses. 3. Replace the Print Head. 4. Reassemble in the reverse procedures after replacing.

  • Page 62: Replacing Print Head Pressure Adjustment Knob

    TTP-248M Bar Code Printer Service Manua 4.11 Replacing Print Head Pressure Adjustment Knob 1. Open the Right Side Cover and Right Side Plate. 2. Remove the Nut from the Print Head Lift Lever. Then remove the Print Head Lift Lever.
  • Page 63 TTP-248M Bar Code Printer Service Manua Screws Screws 5. Remove A.B.C.D in order. 6. Loosen M4 screw, knob E and F. M4 screw Knob 7. Reassemble in the reverse procedures after replacing.

  • Page 64: Replacing Gap/Black Mark Sensor

    TTP-248M Bar Code Printer Service Manua 4.12 Replacing Gap/Black Mark Sensor 1. Disconnect the wires of Gap/Black Mark Sensor. 2. Refer to 4.8 to remove the Stripper/Rewind Plate. 3. Loosen two screws on Print Mechanism Lower Frame. Print Mechanism Lower Frame Screws 4.
  • Page 65 TTP-248M Bar Code Printer Service Manua 5. Remove the screw on the main frame. The Gap/Black Mark Sensor assembly is separated into upper part and lower part. Screws 6. Push the upper part to the through the hole against to the Print Mechanism Lower Frame, place the upper part upside down, pull the lower part to the right side first, and then, pull out the upper part.
  • Page 66 TTP-248M Bar Code Printer Service Manua 7. Reassemble in the reverse procedures after replacing.

  • Page 67: Replacing Print Head Lift Lever Sensor

    TTP-248M Bar Code Printer Service Manua 4.14 Replacing Print Head Lift Lever Sensor 1. Open the Top Left Side Cover. 2. Remove the Curly plastic pipe, and pull out the harness. 3. Disconnect all harness of Print Head Lift Lever Sensor. Remove the 2 screws of Print Head Lift Lever Sensor.

  • Page 68: Troubleshooting

    TTP-248M Bar Code Printer Service Manua 5. TROUBLESHOOTING 5.1 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 69: Calibrate Gap/Black Mark Sensor

    TTP-248M Bar Code Printer Service Manua 2. Labels may be stuck in gap/black mark sensor. side print mechanism. 2. Remove the stuck label. Please close the print Carriage open The printer carriage is open. carriage. Memory full The space of FLASH/DRAM...

  • Page 70: Self-Test

    TTP-248M Bar Code Printer Service Manua 5.3 Self-test To initiate the self-test mode, depress the MENU button. Press MENU button to scroll the cursor to Printer test. Press EXE button to enter the submenu and press MENU button to “Printer Config”. item. Press EXE button to print printer internal setting. In self-test, a check pattern is used to check the performance of the print head.

  • Page 71: Cleaning Print Head

    TTP-248M Bar Code Printer Service Manua 5.6 Cleaning Print Head Switch off and unplug the power cord. Allow the printhead to cool for a minimum of one minute. Open the printer cover. Remove the screw by the side of the carriage release lever.

  • Page 72: Update History

    TTP-248M Bar Code Printer Service Manua UPDATE HISTORY Date Content Editor 2007/1/17 1. Modify TPH part no. Camille 2. Cancel guillotine cutter part no. 2007/1/24 1. Add cutter driver IC A3952SB (Non-RoHS) part no. Camille 2007/1/25 1. Modify the cutter part no.
  • Page 73 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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