Toshiba B-570 manual Replacing the Platen and Feed Roller

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2. MAJOR UNIT REPLACEMENT

EM18-33010A (Revision Date Sep. 29, ‘95)

2.7 REPLACING THE PLATEN AND FEED ROLLER

3)Disconnect the connector for the strip sensor (LED).

4)Remove the six screws (FL-4x6, B-4x12 and P-3x12) to detach the right plate ass’y.

Right Plate

Screw (B-4x12)

Connector		Screws painted red
Connector		(NEVER remove these screws.)
		(NEVER remove these screws.)
	Strip Sensor (LED)	Screw (FL-4x6)
	Screw (B-4x12)	Screw (FL-4x6)
	Screw (B-4x12)

Screw (P-3x12)

Fig. 2-18

NOTE: The machine with a serial number of 4T x x x x x x or later is not equipped with the red screws because of the change in the right plate shape.

5)Loosen the two screws (SM-4x8B) fixing the stepping motor to loosen the platen belt and feed roller belt.

6)Remove the platen belt to detach the platen. Remove the feed roller belt to detach the feed roller.

7)Remove both bearings from the platen or feed roller.

Feed Roller Belt

Holder

Feed Roller (Gray)

Holder

Platen Belt

Holder	Platen (Black)	Fig. 2-19

8)Replace the platen and feed roller, put on the belt and assemble it with the printer. The longer belt is the platen belt.

9)Attach the right plate.

10)Hold down the stepping motor and secure it so that the belts have no slack or disengagement.

11)Reassemble in the reverse order of removal.

2-12

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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 Head Adjusting 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 Adjusting the Cutter Guide Plates Mount the cutter cover with the two screwsRemoved Parts ’ty/Unit Front plate Expansion memory and drawing size Memory ModuleFanfold Paper Guide Module B-4905-FF-QM Mechanism Description Cutter Drive Cutter ModeHarness Wiring Dirty print head Clean the print head Toshiba TECFasten the head lever completely 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 OperationL I N E Press the Pause key. See NoteU S E 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 ParametersAutomatic Diagnostic Printing B B O N T R a N S M I S S I V EPress the Pause key On .2.3 Head Broken Element Check Kanji ROM Check Print Condition ∙ Preset count ∙ Print speedSample Print PROGRAM/MASK ROM CheckEeprom Check Dram CheckFlash Memory Card Check Sensor 1 Check With ribbon Ribbon end Print status content description of each sensor/switchLabel is removed Ribbon end sensor Non-transmissiveConnector FCN-781P024-G/P DIP SW CheckEXP. I/O 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 Feed Length Fine Adjustment Press the Feed keyE D a D J U S T 2 Cut/Strip Position Fine Adjustment Press the Pause key twiceT a D J U S T 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 Print Tone Fine Adjustment Thermal transfer printing fine adjustmentThermal direct printing fine adjustment At the same time On Section Font zero selection Character Code SelectionPress the Pause key seven times N T codeFont Zero Selection R O F O N TFeed key or Restart 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 SettingStacker Selection Press the Pause key fourteen timesA C K E R S Y S T E M O F F R E S H O L D R Threshold Manual Fine Adjustment for the Black Mark SensorThreshold Manual Fine Adjustment for the Feed Gap Sensor Press the Pause key sixteen timesR E S H O L D T Case How To Calculate Theshold Fine Adjustment ValueWhen using labels transmissive sensor When using perforated labels transmissive sensorWhen using labels with black marks reflective 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/CTSReset Selection when the Input Prime Signal is on Press the Pause key 20 timesP U T P R I M EO N 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 DB E L L E N G T H P E R F E E DFeed key or Restart key 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 nextSensor Setting Mode Thermistor CheckPress the Feed key three times 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 SensorPaper End Setting for Feed Gap Sensor Indicates setting complete. Press the Pause key. See NotePress the Pause key five times RAM Clear Mode Table RAM Clear ModeOFF TypeB0H 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