The Speaker Company TTP 248M service manual TTP-248M Bar Code Printer Self-test, Dram Clear

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TTP-248M Bar Code Printer

Service Manual

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. Following the check pattern, the printer prints internal settings as listed below:

1.Printer model and firmware version

2.Check sum

3.Serial port setting

4.Code page setting

5.Country code setting

6.Print speed setting

7.Print density setting

8.Label size setting

9.Gap (Bline) width and offset setting

10.Backing paper transparence

11.File list

12.Memory available

5.4 DRAM Clear

Switch off printer power. Press the PAUSE and FEED button simultaneously then switching on printer power. Release the button for more than 3 seconds. The printer will clear the memory and reset the printer.

Be sure to calibrate the gap register with blank label before printing.

5.5 Diagnosis Operation Procedure

When the power is turned on without any button pressed, self diagnosis is performed automatically to test the available memory. If any error occurs during this period, the ERR light will flash.

Do the self-test and inspect the test pattern to check if the Print head is available.

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Contents TTP 248M Table of Content TTP-248M Bar Code PrinterTTP-248M Bar Code Printer Foundamentals about the System Printer OverviewTTP-248M Bar Code Printer Pinter Specification SpecificationCommunication Interface Available Bar Codes Text Specification File Head of Font Fixed 32bytes BF3~4 VF3~4 Specification Types of PaperTTP-248M Bar Code Printer Ribbon Specification Circuit Description MCUMCU MCU PIN Description Page Page Page Page Page Page Page Page TTP-248M Bar Code Printer Reset Circuit Reset CircuitTTP-248M Bar Code Printer Memory System Etro N TechDecoder Circuits Memory Address MapUse by CPU Area Internal I/O Sdram TTP-248M Bar Code Printer Firmware Address Map TTP-248M Bar Code Printer Power Down Sensor VCCTTP-248M Bar Code Printer Print Head GNDMotor System Circuit Stepping Motor PatternTTP-248M Bar Code Printer Sensor Circuits Ribbon Near End Sensor10 Black mark/ Gap Sensor Circuit Peel-off Sensor 11 Peel-off Sensor Circuit Case Sensor Serial Port Circuit GND VDDParallel Port Circuit VDDTTP-248M Bar Code Printer Cutter Drive System 17 Cutter Drive CircuitTTP-248M Bar Code Printer PIN Switch Circuits Connector Circuits21 Memory Card Connector 23 Stepping Motor Connector TTP-248M Bar Code Printer Optional Items Circuits Optional Item---BuzzerMachanism Remove the Covers and LCD PanelLoosen 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 TroubleshootingCalibrate Gap/Black Mark Sensor Flash / DramTTP-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