BIXOLON service manual Special Circuit Descriptions, SRP-350/352plusA&C, Power Circuit, Voltage

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4-3 Special Circuit Descriptions

SRP-350/352plusA&C

4-3 Special Circuit Descriptions

4-3-1 Power Circuit

This system is operated under 100Vac or 240Vac. The power circuit supplies the three differential DC voltage sources.

		[Figure 4-3 Power Block Diagram]

No.	VOLTAGE		DESCRIPTION
1	VPP(+24VDC)		Cash Drawer Solenoid Driving / Step Motor Voltage
2	VTH(+24VDC)		Thermal Printer Head (TPH) Voltage
3	Vdw(+7.8VDC)		CPU Download Voltage
4	Vcc(+5VDC)		Logic, Sensor Voltage
5	Vdd(+3.3VDC)		CPU, Flesh, SRAM, Reset Voltage
6	Vdd(+2.5VDC)		USB core Voltage

1)Drawer Driving and Feed, Auto Cutter Motor Voltage, TPH Driving Voltage : +24VDC +24VDC is supplied from SMPS. This Voltage is smoothed by capacitors (CL1).

This voltage is used as a Cash Drawer Solenoid Driving voltage, Step motor driving voltage and a source voltage of the other voltage sources and TPH Driving Voltage.

2)Voltage : +7.8V (CPU Download Voltage)

Change the input 24V to 7.8V by a regulation. U1(LM2575S-ADJ)

3) Logic IC Driving Voltage: +5V

Change the input 7.8V to 5V by a regulation. U2(BA17805-E2)

4) CPU, Flesh, SRAM, Reset Voltage: +3.3V

Change the input 7.8V to 3.3V by a regulation. U3(BA033FP-E2)

5) USB core Voltage: +2.5V

Change the input 5V to 2.5V by a regulation. U202(BH25FB1WHFV)

Rev. 2.01

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Contents SRP-350/352plusA&C Service ManualThermal Printer Rev Table of Contents SRP-350/352plusA&C7. Troubleshooting 5. Disassembly and Assembly6. Adjustments and Maintenance 4. Hardware1. Precaution Segment 1-1 Safety Precautions1-2 Servicing Precaution a Remove or reinstall any component or assembly1-4 Operational Precautions 1-3 Precaution for Electrostatically Sensitive Devices ESDs1. Some semiconductor solid state devices are easily damaged by static electricity. Such components are called Electrostatically Sensitive Devices ESDs examples include integrated circuits and some field-effect transistors. The following techniques will reduce the occurrence of component damaged caused by static electricity 2-1-1 AC Adapter Installation 2. Installation and Operation2-1 Installation 2-1-2 Interface Cable Installation2-1-5 Wall Mount Installation SRP-350/352plusA&C 2-2-1 Setting the DIP switches 2-2 Operation2-2-2 Setting the DIP switch RS-232C Serial Interface 2-2-3 Setting the DIP switch IEEE1284 Parallel, USB Interface ※ Auto Cutter Enable / Disable selection2-2-4 Hexadecimal Dumping 2-2-5 The self Test ModeFigure 3-13 The Self-Test Sheet 2-2-6 Setting the Memory Switches SRP-350/352plusA&C 3-1-1 Printer Dimensions mm 3. Product Specifications3-1 Appearance 3-1-2 AC Adapter Dimensions mm3-1-3 Feature Locations-SRP-350/352plusA/C TYPE SRP-350/352plusCOP IEEE1284 Parallel Communication 3-2 General SpecificationsSRP-350/352plusCOS RS-232 Serial Communication SRP-350/352plusCO USB Communication3-3-2 Character Specification 3-3 Thermal Printer Specifications3-3-1 Printer Specification Description※ Note 3-3-3 Paper Specification3-3-4 Reliability and Environment Specification PD 160R3-3-6 TPH Thermal Printer Head Specification 1 180dpi 3-3-5 Printable Area3-3-7 Other Component Specification 3-4-1 SMPS Switching Mode Power Supply Specification 3-4 SMPS Specifications3-4-2 SMPS Output Connector 3-5-1 RS-232C Serial Interface 3-5-1a Specification 3-5 Interface Specifications3-5-1b RS-232C I/F Cable Printer 3-5-1d Signal Description3-5-1c Cable Connection Host3-5-1f S/W Flow Control 2-5-2a Forward Mode Specification Compatibility mode3-5-1e H/W Flow Control ※ Note Refer to the Operation Manual about XON/XOFF flow controlnAck 3-5-2c Signal Specification Compatibility/Nibble/Byte mode3-5-2c IEEE1284 I/F Cable Busy3-5-3 USB2.0 Interface 3-5-3a Specification3-5-3b Signal Description 3-5-3c Cable3-5-4d Construction ※ Note Minimum conductor construction must be stranded tinned copper Series A ConnectorsSeries B Connectors From the3-6-1 Drawer Cable 3-6 Cash Drawer Specifications※ Note +24V is always output through pin 4 during power on 3-6-2 Cable Connection4. Hardware 4-1 Wiring DiagramFigure 4-1 Board Wiring Diagram 4-2 Block Diagram Figure 4-2 Block Diagram4 CPU, Flesh, SRAM, Reset Voltage +3.3V 4-3 Special Circuit Descriptions4-3-1 Power Circuit VOLTAGEFigure 4-4 Reset Block Diagram Figure 4-5 Reset Waveform 4-3-2 RESET CircuitReset signal is signal in order to start-up CPU under Power-on ASM811 REUSF-T4-3-3 Buzzer and Cash Drawer Circuits 1 Buzzer Driving Circuit 2 Cash Drawer Driving Circuit4-3-5 RS-232C Communication Block Diagram 4-3-4 I/F PBA Detect Block DiagramUPD70F3107 4-3-6 Parallel Communication Block Diagram 4-3-7 USB Communication Block Diagram4-3-8 DIP Switch Circuit STROBE1 DATA#1,2LATCH 4-3-9 Thermal Printer Head Circuit1 Scrw 2 Brkt Dip Switch 3 Case Lower 5. Disassembly and Assembly5-1 Case lower block 4 Foot Rubber5 PCB Serial Parallel 8 Screw 1 Screw 2 Brkt PCB6 Main PCB Screw1.Remove the two screws 5-2 Case Upper block1.Push the button to open the Cove Open. 2.Remove the four screws 3.Remove the three screws. 4.Separate the Manual cutter from4 Brkt-Hook 3 Screw Roller Platen Assembly1 Spring Hook 1.Remove the E-Ring. 2.Separate the Spring tension, the4 Screw 5-3 Frame block3 Cover Housing 1 Screw1.Remove the screw 4 Screw 7 ConnectorSpring TPH 5.Separate the Connector from the Heat-sink 2 Heatsink Assy 1 ScrewWasher 1 Screw 2 Frame Main 3 Brkt PCB 4 Power SwitchFrame Main Slip6-1 Adjustment 6. Adjustments and Maintenance6-1-1 Remaining Roll Paper Adjustment 6-1-2 Paper Jam 6-2 Maintenance ※ Caution Turn off the printer power before cleaning7-1 Power Problem 7. TroubleshootingOk? On SMPS 7-2 System Problem 7-3 Panel PBA and Sensor Problem 7-4 Thermal Printer Head and Feed Motor Problem 7-5 Auto Cutter and Drawer Problem Input Ok? 7-6 Dip S/W and I/F PBA Select ProblemSelect Ok? 7-7 RS-232C Serial Communication Problem 7-8 IEEE-1284 Parallel Communication Problem Failure? 7-9 USB2.0 Communication ProblemMain PBA I/F Reverse Mode