Toshiba B-EV4 manual Main PC Board Layout, U6 Sdram

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2. ELECTRONICS SPECIFICATIONS

EO18-33025

2.2 Main PC Board Layout

2.2 Main PC Board Layout

JP7: Serial (RS-232C)

DC Jack

SW1: Power Switch

JP12: Print Head

GS model: 203dpi

Ground Terminal

JP30: Print Head

TS model: 300dpi

U5: Flash ROM

U25: Amplifier

(Reset Detect)

U22: DC/DC Converter

U12: Serial Interface Controller

JP4: Parallel (Centronics)

JP9: USB

JP3: Ethernet (10BASET/100BASETX)

U8: Ethernet Transceiver

U6: SDRAM

U2: 32bit RISC CPU

AT91SAM9260

JP2: SD Card Slot

U33: Regulator

U23: DC/DC Converter

U19: Stepping Motor Driver

U18: Stepping Motor Driver

JP14: Stepping Motor

JP35: Cutter Module

JP28: Feed Key/Status LED

JP19: Strip Module

JP16: Cover Open Sensor

U24: Regulator

JP24: Thermistior

(Stepping Motor)

JP20: Ribbon End Sensor (B-EV4T model)

JP34: Feed Gap Sensor (Upper)

JP17: Black Mark Sensor

JP29: Feed Gap Sensor (Lower)

2-2

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Contents EV4 Series Table of Contents Front View Feature of the B-EV4D/EV4TInterior Rear ViewEV4T V 4 D G S 14 QM R Indication of the Model NameEV4D EV4T Basic SpecificationsTUV External Media Holder B-EV904-PH-QM-R Color Status Key and LEDMedia Type Supply SpecificationsDetection Area of the Reflective Sensor Detection Area of the Transmissive SensorFigure below shows the effective print area on the media RibbonBlock Diagram Electronic SpecificationsU6 Sdram Main PC Board LayoutSdram Description of the Main PC BoardDC/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 Lubrication Replacing the Important PartsEV4T model Replacing the Top CoverEV4D 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 Remove the two screws which secure the print head ass’y Replacing 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 Remove the black mark sensor Replacing the Black Mark SensorReplacing the Important Parts Replacing the Feed Gap Sensor Lower Replacing the Important Parts Remove the feed gap sensor upper Replacing the Feed Gap Sensor UpperReplacing the Important Parts LED Status TroubleshootingRibbon run out Loading the ribbon Print QualityMaintenance Maintenance System Mode Abort of Label Format Auto Call Sensor Adjustment