Toshiba B-EV4 manual Plate

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3. REPLACING THE IMPORTANT PARTS

EO18-33025

(Revision Date: Mar. 27, 2009)

3.5 Replacing the Print Head Ass’y

6.Replace the print head ass’y with a new one, then reassemble in the reverse order of removal.

[ Print head element side ]

[ Print head bracket side ]

Head

Element

Bracket

Spring Plate

Be careful of the following points when reassembling the print head ass’y. Hook both openings on the bracket to the bosses. It is easy to assemble the bracket by hooking one opening at a time. Also, do not touch or scratch the print head element.

Bracket

Boss

Bracket

NOTE: Do not disassemble the print head ass'y which contains the bracket and the spring

plate.

7.After replacing, perform a diagnostic test print or print a sample label to make sure the printer performs correctly for the following points.

•Printing is performed correctly.

•None of dot missing is generated.

•None of blurred print, stain, chipped bar code or characters, wrinkle, smudge, uneven print, etc. is generated.

•Reading the bar code is possible.

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Contents EV4 Series Table of Contents Feature of the B-EV4D/EV4T Front ViewRear View InteriorEV4T Indication of the Model Name V 4 D G S 14 QM RBasic Specifications EV4D EV4TTUV External Media Holder B-EV904-PH-QM-R Key and LED Color StatusSupply Specifications Media TypeDetection Area of the Transmissive Sensor Detection Area of the Reflective SensorRibbon Figure below shows the effective print area on the mediaElectronic Specifications Block DiagramMain PC Board Layout U6 SdramDescription of the Main PC Board SdramDC/DC Converter U22 Type TS34063 JP2 SD Card Slot JP7 Serial Interface JP9 USB Type Type B Connector JP20 Ribbon End Sensor Print Head JP30 Replacing the Important Parts LubricationReplacing the Top Cover EV4T modelEV4D model Hook Media View Window Disconnect the connector from the feed button PC board Replacing the Lower Cover Replacing the Main PC Board Replacing the Important Parts Replacing the Platen Ass’y Replacing the Print Head Ass’y Remove the two screws which secure the print head ass’yConnector Print Head Ass’y Bracket Print Head Block Latch Top Inner Cover Remove the two pins which secure the print head ass’y Plate Replacing the Stepping Motor Lubrication Replacing the Gear Cover Replacing the Important Parts Replacing the Feed Button PC Board Replacing the Cover Open Sensor Replacing the Ribbon Sensor B-SV4T model only Replacing the Black Mark Sensor Remove the black mark sensorReplacing the Important Parts Replacing the Feed Gap Sensor Lower Replacing the Important Parts Replacing the Feed Gap Sensor Upper Remove the feed gap sensor upperReplacing the Important Parts Troubleshooting LED StatusPrint Quality Ribbon run out Loading the ribbonMaintenance Maintenance System Mode Abort of Label Format Auto Call Sensor Adjustment