Replacing the Platen and Feed Roller | Toshiba B-570 manual

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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Toshiba B-570 manual Replacing the Platen and Feed Roller

Contents

Series Table of Contents Checks Procedure Disconnect power cord before replacing important parts Major Unit Replacement Replacing 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 side Replacing the Stepping Motor Replacing the TAKE-UP Motor Replacing the Ribbon Motors Replacing 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 Sensor Replacing the Pinch Roller Shaft ASS’Y Adjustment Correcting Skew Printing High Speed PC Interface Board B-4800-PC-QM Installation Procedure for the Optional Equipment Installation 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 Module Fanfold Paper Guide Module B-4905-FF-QM Mechanism Description Cutter Drive Cutter Mode Harness 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 Mode Outline of the DIAG. Test Operation DIAG. Test Operation L 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 N Sample Print Print Condition ∙ Preset count ∙ Print speed Trans Parameters Automatic 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 Check Eeprom 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-transmissive Connector 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 twice Press the Pause key Parameter Setting Mode Parameter 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 times Cut Position Fine Adjustment Example Feed Length Fine Adjustment Example Label pitch When using a label with a length of less than 38 mmCase Condition Are received Strip 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 times Axis 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 code Font Zero Selection R O F O N TFeed key or Restart Code Control Code Selection Restart CodeM a N U a LN T R O L Press the Pause key Select either ribbon type with Ribbon Type SelectionPress the Pause key ten times ∙ Transmissive ribbon Press the Pause key eleven times Ribbon Motor Drive Voltage Fine Adjustment A T U S P E Strip Wait Status Setting Stacker 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 Sensor Threshold 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 Value When 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 code Select the Euro font code with the Feed key or Euro Font Code SelectionPress the Pause key 18 times R O codeB O H Restart key at Transmission Control Mode SelectionDTR/DSR RTS/CTS Reset 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 N N S O R T R a N S M I S S I V E I N T S P E E D B 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 next Sensor Setting Mode Thermistor CheckPress the Feed key three times Press the Feed key Press the Pause key twice Black Mark Sensor Adjustment Feed Gap Sensor Adjustment Feed key Former value is displayed Paper End Setting for Black Mark Sensor Paper 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 Mode OFF 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 R R a M E T E R C L E a R Parameter Clear SW# SetupFloppy Disk IBM PC/AT DD-MM-YYYY Down Load Procedure ROM Error Code