The Speaker Company TTP 248M service manual

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TTP-248M Bar Code Printer Service Manual

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Contents TTP 248M TTP-248M Bar Code Printer Table of ContentTTP-248M Bar Code Printer Printer Overview Foundamentals about the SystemSpecification TTP-248M Bar Code Printer Pinter SpecificationCommunication Interface Available Bar Codes Text Specification File Head of Font Fixed 32bytes BF3~4 VF3~4 Types of Paper SpecificationTTP-248M Bar Code Printer Ribbon Specification MCU Circuit DescriptionMCU MCU PIN Description Page Page Page Page Page Page Page Page Reset Circuit TTP-248M Bar Code Printer Reset CircuitEtro N Tech TTP-248M Bar Code Printer Memory SystemMemory Address Map Decoder CircuitsUse by CPU Area Internal I/O Sdram TTP-248M Bar Code Printer Firmware Address Map VCC TTP-248M Bar Code Printer Power Down SensorGND TTP-248M Bar Code Printer Print HeadStepping Motor Pattern Motor System CircuitRibbon Near End Sensor TTP-248M Bar Code Printer Sensor Circuits10 Black mark/ Gap Sensor Circuit Peel-off Sensor 11 Peel-off Sensor Circuit Case Sensor GND VDD Serial Port CircuitVDD Parallel Port Circuit17 Cutter Drive Circuit TTP-248M Bar Code Printer Cutter Drive SystemConnector Circuits TTP-248M Bar Code Printer PIN Switch Circuits21 Memory Card Connector 23 Stepping Motor Connector Optional Item---Buzzer TTP-248M Bar Code Printer Optional Items CircuitsRemove the Covers and LCD Panel MachanismLoosen the three screws on Top Left Side Cover Screw LCD Panel Lower Front Cover TTP-248M Bar Code Printer Replacing the Mainboard TTP-248M Bar Code Printer Replacing the Power Supply Unit Belt Ring of Label Rewind Spindle Remove the E-ring of pulley. And then, remove the pulley TTP-248M Bar Code Printer TTP-248M Bar Code Printer Replacing Ribbon Supply Spindle TTP-248M Bar Code Printer TTP-248M Bar Code Printer Replacing Label Supply Spindle TTP-248M Bar Code Printer TTP-248M Bar Code Printer Replacing Label Rewind Spindle TTP-248M Bar Code Printer TTP-248M Bar Code Printer Replacing Platen Remove the Platen and Left Shaft Bearing TTP-248M Bar Code Printer Replacing Motor TTP-248M Bar Code Printer TTP-248M Bar Code Printer Replacing Print Head Remove the 2 screws these are on the TPH switch plate Remove A.B.C.D in order Loosen M4 screw, knob E and F TTP-248M Bar Code Printer Replacing Gap/Black Mark Sensor TTP-248M Bar Code Printer Reassemble in the reverse procedures after replacing Curly plastic pipe Screws Troubleshooting TroubleshootingFlash / Dram Calibrate Gap/Black Mark SensorTTP-248M Bar Code Printer Self-test Diagnosis Operation ProcedureDram Clear TTP-248M Bar Code Printer Cleaning Print Head Update History No.35, Sec , Ligong 1st Rd., Wujie Township