The Speaker Company TTP 248M service manual TTP-248M Bar Code Printer Cleaning Print Head

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TTP-248M Bar Code Printer

Service Manual

5.6Cleaning Print Head

1.Switch off and unplug the power cord. Allow the printhead to cool for a minimum of one minute.

2.Open the printer cover.

3.Remove the screw by the side of the carriage release lever.

4.Open the printer carriage release lever.

5.Remove the media and ribbon (If loaded).

6.Clean the print head element with a head cleaner pen or use a cotton swab and 100% ethanol to clean the print head surface.

7.Do not close the print head until the alcohol volatilizing.

8.Close the printer cover.

Note:

*Do not touch printer head by hand. If you touch it careless, please use ethanol to clean it. *It’s industry alcohol. Please do not use regular alcohol, which may damage the printer head.

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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 SensorDram Clear Diagnosis Operation ProcedureTTP-248M Bar Code Printer Self-test TTP-248M Bar Code Printer Cleaning Print Head Update History No.35, Sec , Ligong 1st Rd., Wujie Township