Toshiba B-570 manual Replacing the Platen and Feed Roller

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2. MAJOR UNIT REPLACEMENT

EM18-33010A

2.6 REPLACING THE PRINT HEAD

Print Head Bracket

Print Head

b (securing the print head)

b cA

	(Print Head Position	c (securing the adjusting pin)
	(Print Head Position	Fig. 2-16
	Adjusting Pin)	Fig. 2-16

(1)Loosen the screws c securing the print head position adjusting pin.

(2)Loosen the screws b one by one, slightly move the print head backward or forward, and then tighten the screws b and c . Ensure that the print head is parallel to the platen. If not, print tone will be uneven.

(3)Make a test print and if necessary, repeat Step 2) until the printer prints properly.

2.7REPLACING THE PLATEN AND FEED ROLLER

CAUTION:

1.NEVER remove the four screws painted red fixing the right plate and reinforcing plate. (See Fig. 2-16)

2.The pinch roller belt assembled inside the printer does not need to be replaced because it receives less load.

1)Remove the front plate and belt cover. (See Fig. 2-6.)

2)Turn the head lever counterclockwise, then release the ribbon shaft holder plate.

Head Lever

E-ring (M3)

Hold Shaft

Ribbon Shaft Holder Plate

Fig. 2-17

2-11

Image 14

Contents Series Table of Contents Procedure ChecksMajor Unit Replacement Disconnect power cord before replacing important partsReplacing the PS UNIT, I/F PC Board and CPU PC Board An oscilloscope Turn the power off and mount the left side Cover and top coverReplacing the Stepping Motor Replacing the Ribbon Motors Replacing the TAKE-UP MotorReplacing the Solenoid Head Up Link Solenoid Spring Pin Replacing the Print Head Old type print headAdjusting the print head position New type print head Replacing the Platen and Feed Roller Replacing the Platen and Feed Roller Replacing the Paper Sensor Replacing the Ribbon Back Tension BlockReplacing the Pinch Roller Shaft ASS’Y Adjustment Correcting Skew Printing Installation Procedure for the Optional Equipment High Speed PC Interface Board B-4800-PC-QMInstallation 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 Memory Module Expansion memory and drawing sizeFanfold Paper Guide Module B-4905-FF-QM Cutter Drive Cutter Mode Mechanism DescriptionHarness Wiring Fasten the head lever completely Dirty print head Clean the print headToshiba TEC Refer to page 2-3 to adjust Sensor Setting Mode Parameter Setting ModeTest Print Mode RAM Clear ModeDIAG. Test Operation Outline of the DIAG. Test OperationU S E L I N EPress the Pause key. See Note B B O N Self Test ModeMaintenance Counter Printing I N T E N a N C E C O U N T E RSample Print Print Condition ∙ Preset count ∙ Print speed Parameters TransPress 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 PROGRAM/MASK ROM Check Print Condition ∙ Preset count ∙ Print speedSample Print Kanji ROM CheckFlash Memory Card Check Eeprom CheckDram Check Sensor 1 Check Non-transmissive Print status content description of each sensor/switchLabel is removed Ribbon end sensor With ribbon Ribbon endEXP. I/O Check Connector FCN-781P024-G/PDIP SW Check Press the Pause key twice Press the Feed key twice R M a L E N D A D ErrorHead Broken Element Check E R M a L H E a D C H E C KParameter Setting Mode Press the Pause keyParameter 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 Pause key three times Back Feed Length Fine AdjustmentAt the same time On Section Axis fine adjustment Press the Feed key Press the Pause keyFeed Length Fine Adjustment Example Cut Position Fine Adjustment ExampleAre received When using a label with a length of less than 38 mmCase Condition Label pitchStrip Position Fine Adjustment Example Back Feed Length Fine Adjustment Example Press the Pause key four times Axis Fine AdjustmentPress the Pause key On Section Print tone fine adjustment D J U S TAxis Fine Adjustment Example Thermal direct printing fine adjustment Print Tone Fine AdjustmentThermal transfer printing fine adjustment N T code Character Code SelectionPress the Pause key seven times At the same time On Section Font zero selectionFeed key or Restart Font Zero SelectionR O F O N T Control Code Selection CodePress the Pause key CodeM a N U a LN T R O L Restart∙ Transmissive ribbon Ribbon Type SelectionPress the Pause key ten times Select either ribbon type withRibbon Motor Drive Voltage Fine Adjustment Press the Pause key eleven timesStrip Wait Status Setting A T U S P EA C K E R S Y S T E M O F F Stacker SelectionPress the Pause key fourteen times Threshold Manual Fine Adjustment for the Black Mark Sensor R E S H O L D RR E S H O L D T Threshold Manual Fine Adjustment for the Feed Gap SensorPress the Pause key sixteen times How To Calculate Theshold Fine Adjustment Value CaseWhen using labels with black marks reflective sensor When using labels transmissive sensorWhen using perforated labels transmissive sensor N J I code Kanji Code SelectionPress the Pause key 17 times Select either code withR O codeB O H Euro Font Code SelectionPress the Pause key 18 times Select the Euro font code with the Feed key orRTS/CTS Transmission Control Mode SelectionDTR/DSR Restart key atP U T P R I M EO N Reset Selection when the Input Prime Signal is onPress the Pause key 20 times I N T C O N D I T I O N Test Print ModeNormal Test Print Pause keyI N T S P E E D N S O R T R a N S M I S S I V EFeed 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 ∙ Print Tone Fine Adjustment Value + Process Test PrintFrom B of the next Press the Pause key Bar code are printed on 5 labelsPress the Feed key three times Sensor Setting ModeThermistor Check Black Mark Sensor Adjustment Press the Feed key Press the Pause key twiceFeed Gap Sensor Adjustment Paper End Setting for Black Mark Sensor Feed key Former value is displayedPress the Pause key five times Paper End Setting for Feed Gap SensorIndicates setting complete. Press the Pause key. See Note RAM Clear Mode RAM Clear Mode TableB0H OFFType I N T E C O U N T E R C L E a R Maintenance Counter ClearR a M C L E a R M P L E T EParameter Clear R a M E T E R C L E a RIBM PC/AT SetupFloppy Disk SW#Down Load Procedure DD-MM-YYYYError Code ROM