Toshiba B-570 manual Replacing the Print Head, Old type print head

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2. MAJOR UNIT REPLACEMENT

EM18-33010A (Revision Date Feb. 01, ’96)

2.6 REPLACING THE PRINT HEAD

2.6 REPLACING THE PRINT HEAD

CAUTION:

1.NEVER touch the element when handling the print head.

2.NEVER touch the connector pins to avoid a breakdown of the print head by static electricity.

3.NEVER remove the two screws painted red on the side of the print block.

4.NEVER remove the four screws on the side of the print block.

5.NEVER remove the print block, otherwise it requires the adjustment of the position when reassembling.

NOTE: The following procedure can be employed without removing the top cover and the left side cover.

2.6.1Old type print head

1)Turn the head lever clockwise to lower the print head. Remove the two SM-4x8B screws.

2)Turn the head lever counter clockwise and disconnect the two connectors to detach the print head from the print block.

Screw (SM-4x8B)

Screws

(NEVER remove these screws.)

Print Block

Connector

Screws painted red

(NEVER remove these screws.)

Print Head	Connector	Head Lever	Fig. 2-13

3)Replace the print head, connect the connectors and install it in the print block.

4)Turn the head lever clockwise. Push the print head and secure it temporarily. Follow the procedure on the next page.

2-8

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Contents Series Table of Contents Checks ProcedureDisconnect power cord before replacing important parts Major Unit ReplacementReplacing the PS UNIT, I/F PC Board and CPU PC Board Cover and top cover An oscilloscope Turn the power off and mount the left sideReplacing the Stepping Motor Replacing the TAKE-UP Motor Replacing the Ribbon MotorsReplacing the Solenoid Head Up Link Solenoid Spring Pin Old type print head Replacing the Print HeadAdjusting the print head position New type print head Replacing the Platen and Feed Roller Replacing the Platen and Feed Roller Replacing the Ribbon Back Tension Block Replacing the Paper SensorReplacing the Pinch Roller Shaft ASS’Y Adjustment Correcting Skew Printing High Speed PC Interface Board B-4800-PC-QM Installation Procedure for the Optional EquipmentInstallation Procedure for the Optional Equipment Cutter Module B-4205-QM EM18-33010A SVO7A1003 Nov ’97 Removed Parts ’ty/Unit Front plate Adjusting the Cutter Guide PlatesMount the cutter cover with the two screws Expansion memory and drawing size Memory ModuleFanfold Paper Guide Module B-4905-FF-QM Mechanism Description Cutter Drive Cutter ModeHarness Wiring Fasten the head lever completely Dirty print head Clean the print headToshiba TEC Refer to page 2-3 to adjust RAM Clear Mode Parameter Setting ModeTest Print Mode Sensor Setting ModeOutline of the DIAG. Test Operation DIAG. Test OperationU S E L I N EPress the Pause key. See Note I N T E N a N C E C O U N T E R Self Test ModeMaintenance Counter Printing B B O NSample Print Print Condition ∙ Preset count ∙ Print speed Trans ParametersPress the Pause key On .2.3 Head Broken Element Check Automatic Diagnostic PrintingB B O N T R a N S M I S S I V E Kanji ROM Check Print Condition ∙ Preset count ∙ Print speedSample Print PROGRAM/MASK ROM CheckFlash Memory Card Check Eeprom CheckDram Check Sensor 1 Check With ribbon Ribbon end Print status content description of each sensor/switchLabel is removed Ribbon end sensor Non-transmissiveEXP. I/O Check Connector FCN-781P024-G/PDIP SW Check E R M a L H E a D C H E C K R M a L E N D A D ErrorHead Broken Element Check Press the Pause key twice Press the Feed key twicePress the Pause key Parameter Setting ModeParameter Setting Mode Table E D a D J U S T Feed Length Fine AdjustmentPress the Feed key T a D J U S T 2 Cut/Strip Position Fine AdjustmentPress the Pause key twice Press the Feed key Press the Pause key Back Feed Length Fine AdjustmentAt the same time On Section Axis fine adjustment Press the Pause key three timesCut Position Fine Adjustment Example Feed Length Fine Adjustment ExampleLabel pitch When using a label with a length of less than 38 mmCase Condition Are receivedStrip Position Fine Adjustment Example Back Feed Length Fine Adjustment Example D J U S T Axis Fine AdjustmentPress the Pause key On Section Print tone fine adjustment Press the Pause key four timesAxis Fine Adjustment Example Thermal direct printing fine adjustment Print Tone Fine AdjustmentThermal transfer printing fine adjustment At the same time On Section Font zero selection Character Code SelectionPress the Pause key seven times N T codeFeed key or Restart Font Zero SelectionR O F O N T Code Control Code SelectionRestart CodeM a N U a LN T R O L Press the Pause keySelect either ribbon type with Ribbon Type SelectionPress the Pause key ten times ∙ Transmissive ribbonPress the Pause key eleven times Ribbon Motor Drive Voltage Fine AdjustmentA T U S P E Strip Wait Status SettingA C K E R S Y S T E M O F F Stacker SelectionPress the Pause key fourteen times R E S H O L D R Threshold Manual Fine Adjustment for the Black Mark SensorR E S H O L D T Threshold Manual Fine Adjustment for the Feed Gap SensorPress the Pause key sixteen times Case How To Calculate Theshold Fine Adjustment ValueWhen using labels with black marks reflective sensor When using labels transmissive sensorWhen using perforated labels transmissive sensor Select either code with Kanji Code SelectionPress the Pause key 17 times N J I codeSelect the Euro font code with the Feed key or Euro Font Code SelectionPress the Pause key 18 times R O codeB O HRestart key at Transmission Control Mode SelectionDTR/DSR RTS/CTSP U T P R I M EO N Reset Selection when the Input Prime Signal is onPress the Pause key 20 times Pause key Test Print ModeNormal Test Print I N T C O N D I T I O NN S O R T R a N S M I S S I V E I N T S P E E DFeed key or Restart key B E L L E N G T HP E R F E E D From B of the preceding Test Print Sample Process Test Print ∙ Print Tone Fine Adjustment Value +Press the Pause key Bar code are printed on 5 labels From B of the nextPress the Feed key three times Sensor Setting ModeThermistor Check Press the Feed key Press the Pause key twice Black Mark Sensor AdjustmentFeed Gap Sensor Adjustment Feed key Former value is displayed Paper End Setting for Black Mark SensorPress the Pause key five times Paper End Setting for Feed Gap SensorIndicates setting complete. Press the Pause key. See Note RAM Clear Mode Table RAM Clear ModeB0H OFFType M P L E T E Maintenance Counter ClearR a M C L E a R I N T E C O U N T E R C L E a RR a M E T E R C L E a R Parameter ClearSW# SetupFloppy Disk IBM PC/ATDD-MM-YYYY Down Load ProcedureROM Error Code