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The Speaker Company TTP 248M Replacing Gap/Black Mark Sensor, Print Mechanism Lower Frame Screws

Models: TTP 248M

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4.12 Replacing Gap/Black Mark Sensor

TTP-248M Bar Code Printer

Service Manual

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. Loosen the two screws on the bottom of the Gap/Black Mark Sensor.

Screws

61

Image 64

The Speaker Company TTP 248M service manual Replacing Gap/Black Mark Sensor, TTP-248M Bar Code Printer Service Manual

Contents

TTP 248M THERMAL TRANSFER / DIRECT THERMAL BAR CODE PRINTER SERVICE MANUALTTP-248M Bar Code Printer Service Manual TABLE OF CONTENT Service Manual TTP-248M Bar Code PrinterTTP-248M Bar Code Printer Service Manual 1. FOUNDAMENTALS ABOUT THE SYSTEMPrinter Overview Front ViewTTP-248M Bar Code Printer Service Manual 1.2 Pinter Specification SpecificationEnvironment ElectricalCommunication Interface TTP-248M Bar Code Printer Service Manual1.3 Available Bar Codes Host9 Pin 25 Pin1.4 Text Specification Specification of FontsFont Width x LengthVF1~4 File Head of Font Fixed 32bytesTTP-248M Bar Code Printer Service Manual TTP-248M Bar Code Printer Service Manual BF3~4 VF3~4Decode Table 2. SUPPLY SPECIFICATIONS 2.2 Specification2.1 Types of Paper TTP-248M Bar Code Printer Service ManualTTP-248M Bar Code Printer Service Manual 2.3 Ribbon Specification SpecificationFig. 3.1 MCU Circuit Diagram 3. CIRCUIT DESCRIPTION3.1 MCU TTP-248M Bar Code Printer Service ManualFig. 3.2 System Block of PCB TTP-248M Bar Code Printer Service ManualTTP-248M Bar Code Printer Service Manual 3.2 MCU PIN Description TTP-248M Bar Code Printer Service Manual TTP-248M Bar Code Printer Service Manual TTP-248M Bar Code Printer Service Manual TTP-248M Bar Code Printer Service Manual TTP-248M Bar Code Printer Service Manual TTP-248M Bar Code Printer Service Manual TTP-248M Bar Code Printer Service Manual TTP-248M Bar Code Printer Service Manual TTP-248M Bar Code Printer Service Manual 3.3 Reset Circuit Fig. 3.3 Reset CircuitTTP-248M Bar Code Printer Service Manual 3.4 Memory System Fig. 3.4 Memory SystemG ND J V CCTTP-248M Bar Code Printer Service Manual 3.5 Decoder Circuits 3.6 Memory Address MapPrivileged mode USE CPLD to decodeTTP-248M Bar Code Printer Service Manual TTP-248M Bar Code Printer Service Manual 0xA88FFFFF0xAC000000 0xAC3FFFFFTTP-248M Bar Code Printer Service Manual 3.7 Firmware Address Map TTP-248M Bar Code Printer Service Manual 3.8 Power Down Sensor Fig. 3.6 Power Down Sensor CircuitIp k Vref3.9 Print Head Fig. 3.7 Print Head ROHM KF2004-GL41B Print Head SensorTTP-248M Bar Code Printer Service Manual RESET PHTTP-248M Bar Code Printer Service Manual 3.10 Motor System Circuit PHASESTEP INARTTP-248M Bar Code Printer Service Manual 3.11 Sensor Circuits Ribbon Near End SensorFig. 3.9 Ribbon Near End Sensor Circuit GAP Sensor Black Mark SensorFig. 3.10 Black mark/ Gap Sensor Circuit Peel-off Sensor TTP-248M Bar Code Printer Service ManualBM E GAPEFig. 3.11 Peel-off Sensor Circuit Case Sensor Fig. 3.12 Case sensor Print Head Lift Lever Open SensorFig. 3.13 Print Head Lift Lever Open Sensor Circuit Ribbon End Sensor TTP-248M Bar Code Printer Service Manual3.12 Serial Port Circuit Fig. 3.14 Ribbon End Sensor CircuitFig. 3.15 Serial Port Circuit TTP-248M Bar Code Printer Service Manual3.13 Parallel Port Circuit Fig. 3.16 Parallel Port CircuitTTP-248M Bar Code Printer Service Manual ERRORTTP-248M Bar Code Printer Service Manual 3.14 Cutter Drive System Fig. 3.17 Cutter Drive CircuitTTP-248M Bar Code Printer Service Manual 3.15 PIN Switch Circuits 3.16 Connector CircuitsFig. 3.18 LTC490 and RS232 pin switch Fig. 3.19 Download boot program to on-board Flash memory pin switchFig. 3.21 Memory Card Connector Fig. 3.22 Cutter Connector CircuitTTP-248M Bar Code Printer Service Manual JP33Fig. 3.23 Stepping Motor Connector TTP-248M Bar Code Printer Service ManualSTEPPING MOTOR OUT1TTP-248M Bar Code Printer Service Manual 3.17 Optional Items Circuits Fig. 3. Optional Item---Buzzer10 K BUZZERO4. MACHANISM 4.1 Remove the Covers and LCD PanelTTP-248M Bar Code Printer Service Manual 1. Open Top Right Side Cover3. Loosen the three screws on Top Left Side Cover TTP-248M Bar Code Printer Service Manual4. Remove Top Right Side Cover and Top Left Side Cover TTP-248M Bar Code Printer Service Manual Screw LCD Panel Screw Lower Front CoverTTP-248M Bar Code Printer Service Manual 4.2 Replacing the Mainboard Screw4.3 Replacing the Power Supply Unit TTP-248M Bar Code Printer Service ManualPower Supply Unit Two screws ScrewsTTP-248M Bar Code Printer Service Manual 4.4 Replacing the Ribbon Rewind Spindle1. Refer to 4.3 to remove the Power Supply Unit TTP-248M Bar Code Printer Service Manual 4. Remove the E-ring of pulley. And then, remove the pulley5. Loosen the three screws on the Cam Spindle Support Plate Screws7. Reassemble in the reverse procedures after replacing TTP-248M Bar Code Printer Service Manual6. Replace the Ribbon Rewind Spindle 4.5 Replacing Ribbon Supply Spindle TTP-248M Bar Code Printer Service Manual1. Remove the four screws of the Ribbon Supply Spindle 2. Remove the shaft bearing 3. Replace the Ribbon Supply SpindleTTP-248M Bar Code Printer Service Manual 4. Reassemble in the reverse procedures after replacing4.6 Replacing Label Supply Spindle TTP-248M Bar Code Printer Service Manual1. Refer to 4.2 to remove the Mainboard 2. Remove the three screws of the Label Supply SpindleTTP-248M Bar Code Printer Service Manual 5. Reassemble in the reverse procedures after replacing4.7 Replacing Label Rewind Spindle TTP-248M Bar Code Printer Service Manual1. Refer to 4.3 to remove the Power Supply Unit 2. Remove the E-ring and the pulley of the Label Rewind Spindle6. Reassemble in the reverse procedures after replacing TTP-248M Bar Code Printer Service Manual5. Replace the Label Rewind Spindle TTP-248M Bar Code Printer Service Manual 4.8 Replacing Platen 1. Refer to 4.1 to remove the Top Right and Left Side Covers2. Release the Print Head Lift Lever 3. Remove the screw and the Stripper/Rewind Plate7. Reassemble in the reverse procedures after replacing TTP-248M Bar Code Printer Service Manual6. Remove the Platen and Left Shaft Bearing TTP-248M Bar Code Printer Service Manual 4.9 Replacing Motor 1. Loosen the four fixing screws on the Motor2. Disconnect the harness from the Motor 3. Replace the MotorTTP-248M Bar Code Printer Service Manual 4. Reassemble in the reverse procedures after replacingTTP-248M Bar Code Printer Service Manual 4.10 Replacing Print Head 4. Reassemble in the reverse procedures after replacing1. Remove the screws on the Print Head 2. Disconnect the two Printer Harnesses 3. Replace the Print HeadTTP-248M Bar Code Printer Service Manual 4.11 Replacing Print Head Pressure Adjustment Knob1. Open the Right Side Cover and Right Side Plate 7. Reassemble in the reverse procedures after replacing TTP-248M Bar Code Printer Service Manual5. Remove A.B.C.D in order 6. Loosen M4 screw, knob E and F 4.12 Replacing Gap/Black Mark Sensor TTP-248M Bar Code Printer Service Manual1. Disconnect the wires of Gap/Black Mark Sensor 2. Refer to 4.8 to remove the Stripper/Rewind PlateTTP-248M Bar Code Printer Service Manual 5. Remove the screw on the main frame. The Gap/Black Mark Sensor assembly is separated into upper part and lower partTTP-248M Bar Code Printer Service Manual 7. Reassemble in the reverse procedures after replacingTTP-248M Bar Code Printer Service Manual 4.14 Replacing Print Head Lift Lever SensorCurly plastic pipe Screws 5. TROUBLESHOOTING 5.1 TroubleshootingCause of Errors Recovery ProcedureOn-Line indicator is off, error indicator is5.2 Calibrate Gap/Black Mark Sensor Carriage open5.5 Diagnosis Operation Procedure TTP-248M Bar Code Printer Service Manual 5.3 Self-test5.4 DRAM Clear TTP-248M Bar Code Printer Service Manual 5.6 Cleaning Print Head UPDATE HISTORY TTP-248M Bar Code Printer Service ManualContent DateCorporate Headquarters