BIXOLON SRP-270 Special Circuit Descriptions, Power Circuit, Logic IC Driving Voltage +5V

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SRP-270

4-3 Special Circuit Descriptions

4-3-1 Power Circuit

This system is operated under 110Vac or 230Vac. The power circuit supplies the three differential DC voltage sources.

[Figure 4-3 Power Block Diagram]

No.

VOLTAGE

DESCRIPTION

1

+24VDC

Cash Drawer Solenoid Driving / Step Motor Voltage

2

+5VDC

Logic IC Driving Voltage / Sensor

1) Drawer Driving and Feed, Auto Cutter Motor Voltage : +24Vdc

+24VDC is supplied from SMPS. This Voltage is smoothed by capacitors (C1,6,39).

This voltage is used as a Printer Head, Printer Motor, Cash Drawer Solenoid Driving voltage and a source voltage of the +5V voltage sources.

2) Logic IC Driving Voltage: +5V

+5Vdc Logic driving voltage is produced by the step-down dc-dc converter U1(34063A). That is, U1 produces rectangular wave. This makes D2 (EK04) and L6 store energy. The voltage is smoothed by C8 (470uF) and then +5Vdc Logic voltage is produced.

Rev. 3.02

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Contents SRP-270 SRP-270 Alignment and Adjustments SRP-270 Copyright About this Manual Precaution symbolsAbout Overview of this Receipt PrinterSafety Precautions Precaution SegmentWaring Do not use an isolation transformer during this test Servicing Precaution Precaution for Electrostatically Sensitive Devices ESDs Interface Cable Installation Installation and OperationInstallation AC Adapter InstallationPaper Roll Installation Setting the DIP switch RS-232C Serial Interface Setting the DIP switchesOperation YES OFF Setting the DIP switch IEEE1284 Parallel, USB InterfaceMode Hexadecimal Dumping Self Test ModeSerial Self-Test Sheet Parallel Self-Test Sheet SRP-270 Appearance Product SpecificationsPrinter Dimensions mm AC Adapter Dimensions mmFeature Location Feature LocationsUSB General SpecificationsPrinter Mecha Specifications Printer Mecha SpecificationGND Character SpecificationAscii Printer SMP-710/SMP-710N Pin DescriptionAuto cutter specification Printer Head SpecificationPrinter Head Thermistor Specification Feed & Carriage Motor SpecificationSmps Switching Mode Power Supply Specification Smps SpecificationsRibbon Cassette Specification Other Component Specification1 RS-232C Serial Interface 1a Specification Interface Specifications1c Cable Connection 1d Signal Description1e H/W Flow Control Printer Host Side 2 RS-485 Serial Interface 2a Specification1f S/W Flow Control 2c Cable ConnectionIEEE1284 Parallel Interface 2d Signal Description3a Forward Mode Specification Compatibility mode 2f S/W Flow Control3c IEEE1284 I/F Cable 3c Signal Specification Compatibility/Nibble/Byte mode4c USB I/F Cable 4a Specification4b Signal Description 4 USB2.0 InterfaceCable Connection Cash Drawer Specifications※ Note +24V is always output through pin 4 during power on Cash Drawer CableHardware Wiring DiagramBlock Diagram Block DiagramLogic IC Driving Voltage +5V Power CircuitSpecial Circuit Descriptions Drawer Driving and Feed, Auto Cutter Motor Voltage +24VdcReset Block Diagram Reset CircuitCash Drawer Circuits Cash Drawer Block DiagramPBA DIPC1 DIPC2 DIPC3 4 I/F PBA Detect Block DiagramRS-232C Communication Block Diagram 5 RS-232C Communication Block Diagram10 RS-485 Communication Block Diagram 6 RS-485 Communication Block DiagramUSB Communication Block Diagram Parallel Communication Block Diagram12 DIP Switch Block Diagram DIP Switch CircuitGeneral Precautions on Disassembly Disassembly and AssemblyPlate Bottom Cover Assy SRP-270A & SRP-270C Type Cover Assy SRP-270D TypeCase Upper Assy SRP-270A & SRP-270C Type Printer Assy SRP-270A & SRP-270C Type Case Upper Assy SRP-270D TypeAuto Cutter Assy Printer Assy SRP-270D TypeInterface Board Assy Main PCBPrinter Adjustment Alignment and AdjustmentsAdjustment of Head gap Troubleshooting USB Problem Ieee 1284 ProblemPrinting specifications SpecificationsAppendix Spec of SMP-710/710N ANK Character specificationsPaper specifications Ribbon Cassette specifications Reliability Main Unit specificationsMcbf Mechanisms specifications Electrical specificationsPrinciple of Movement SRP-270 SRP-270 SRP-270 Operation of Color change Description of Timing chart.1 Circuit board block diagram Handling the Printer Precautions on Printer HandlingPaper Setting Procedures Insertion/Removal Remove method by manual Ribbon Cassette Installation Cleaning MaintenanceInspection Lubricants and Adhesive Application Repair Tools, Lubricants and AdhesivesFPC Repair GuidelinesRev SRP-270 SRP-270 Phenomenon Taiwan Tack co Assignment Connector PinWPH DisassemblyAssembly WBHCheck Point Sub-assemblies②LEVER Tension ②SWITCH Lever③WIRE Assy ①SHAFT Pulley④GEAR Knob Idle ①BRACKET P/F R②GEAR PF Idle ③GEAR KnobMain-assemblies ⑤BRACKET PF L ①GEAR Tape UP②GEAR TU Pulley ③WASHER Belt Guide⑤PLATEN Paper Guide ①SUB PCB Assy②SCREW Tapping M2*3, 2EA ③MANUAL Cutter④LEVER Color Change ①FRAME Main C/K ASSY-4②SERIAL NO. TAG ③TAPE Insulation③RIBBON Feeder Assy ⑧FPC Connector①GEAR Reduction a ②GEAR Reduction B⑧HEAD Cover Assy ①AD Lever ②SHAFT Head Guide ③SHAFT Head Carriage⑤HEAD Print ⑤RIBBON Frame ⑥SPRING Ribbon Frame①RIBBON Frame ②SPRING Ribbon Frame Adjustment