SRP-350/352plusA&C, RESET Circuit, ASM811 REUSF-T | BIXOLON

4-3-2 RESET Circuit

SRP-350/352plusA&C

4-3-2 RESET Circuit

Reset signal is signal in order to start-up CPU under Power-on.

Reset circuit uses a reset ASM811REUSF-T(U8). When 3.3Vdc is fallen under 2.7Vdc by Power-off, reset signal prohibits the system from miss-operating by lowering down to 0V.

ASM811

REUSF-T

[Figure 4-4 Reset Block Diagram]

[Figure 4-5 Reset Waveform]

Rev. 2.01

- 35 -

Image 35

BIXOLON service manual SRP-350/352plusA&C, RESET Circuit, Reset signal is signal in order to start-up CPU under Power-on

Contents

Thermal Printer Rev Service ManualSRP-350/352plusA&C SRP-350/352plusA&C Table of Contents 4. Hardware 5. Disassembly and Assembly6. Adjustments and Maintenance 7. Troubleshooting 1-1 Safety Precautions 1. Precaution Segment a Remove or reinstall any component or assembly 1-2 Servicing Precaution 1. 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 1-3 Precaution for Electrostatically Sensitive Devices ESDs1-4 Operational Precautions 2-1-2 Interface Cable Installation 2. Installation and Operation2-1 Installation 2-1-1 AC Adapter Installation 2-1-5 Wall Mount Installation SRP-350/352plusA&C 2-2-2 Setting the DIP switch RS-232C Serial Interface 2-2 Operation2-2-1 Setting the DIP switches ※ Auto Cutter Enable / Disable selection 2-2-3 Setting the DIP switch IEEE1284 Parallel, USB Interface 2-2-5 The self Test Mode 2-2-4 Hexadecimal Dumping Figure 3-13 The Self-Test Sheet 2-2-6 Setting the Memory Switches SRP-350/352plusA&C 3-1-2 AC Adapter Dimensions mm 3. Product Specifications3-1 Appearance 3-1-1 Printer Dimensions mm 3-1-3 Feature Locations-SRP-350/352plusA/C TYPE SRP-350/352plusCO USB Communication 3-2 General SpecificationsSRP-350/352plusCOS RS-232 Serial Communication SRP-350/352plusCOP IEEE1284 Parallel Communication Description 3-3 Thermal Printer Specifications3-3-1 Printer Specification 3-3-2 Character Specification PD 160R 3-3-3 Paper Specification3-3-4 Reliability and Environment Specification ※ Note 3-3-5 Printable Area 3-3-6 TPH Thermal Printer Head Specification 1 180dpi 3-3-7 Other Component Specification 3-4-2 SMPS Output Connector 3-4 SMPS Specifications3-4-1 SMPS Switching Mode Power Supply Specification 3-5-1b RS-232C I/F Cable 3-5 Interface Specifications3-5-1 RS-232C Serial Interface 3-5-1a Specification Host 3-5-1d Signal Description3-5-1c Cable Connection Printer ※ Note Refer to the Operation Manual about XON/XOFF flow control 2-5-2a Forward Mode Specification Compatibility mode3-5-1e H/W Flow Control 3-5-1f S/W Flow Control Busy 3-5-2c Signal Specification Compatibility/Nibble/Byte mode3-5-2c IEEE1284 I/F Cable nAck 3-5-3c Cable 3-5-3a Specification3-5-3b Signal Description 3-5-3 USB2.0 Interface 3-5-4d Construction From the Series A ConnectorsSeries B Connectors ※ Note Minimum conductor construction must be stranded tinned copper 3-6-2 Cable Connection 3-6 Cash Drawer Specifications※ Note +24V is always output through pin 4 during power on 3-6-1 Drawer Cable Figure 4-1 Board Wiring Diagram 4-1 Wiring Diagram4. Hardware Figure 4-2 Block Diagram 4-2 Block Diagram VOLTAGE 4-3 Special Circuit Descriptions4-3-1 Power Circuit 4 CPU, Flesh, SRAM, Reset Voltage +3.3V ASM811 REUSF-T 4-3-2 RESET CircuitReset signal is signal in order to start-up CPU under Power-on Figure 4-4 Reset Block Diagram Figure 4-5 Reset Waveform 2 Cash Drawer Driving Circuit 4-3-3 Buzzer and Cash Drawer Circuits 1 Buzzer Driving Circuit UPD70F3107 4-3-4 I/F PBA Detect Block Diagram4-3-5 RS-232C Communication Block Diagram 4-3-7 USB Communication Block Diagram 4-3-6 Parallel Communication Block Diagram 4-3-8 DIP Switch Circuit 4-3-9 Thermal Printer Head Circuit DATA#1,2LATCH STROBE1 4 Foot Rubber 5. Disassembly and Assembly5-1 Case lower block 1 Scrw 2 Brkt Dip Switch 3 Case Lower Screw 8 Screw 1 Screw 2 Brkt PCB6 Main PCB 5 PCB Serial Parallel 3.Remove the three screws. 4.Separate the Manual cutter from 5-2 Case Upper block1.Push the button to open the Cove Open. 2.Remove the four screws 1.Remove the two screws 1.Remove the E-Ring. 2.Separate the Spring tension, the Roller Platen Assembly1 Spring Hook 4 Brkt-Hook 3 Screw 1 Screw 5-3 Frame block3 Cover Housing 4 Screw 2 Heatsink Assy 1 Screw 4 Screw 7 ConnectorSpring TPH 5.Separate the Connector from the Heat-sink 1.Remove the screw Slip 1 Screw 2 Frame Main 3 Brkt PCB 4 Power SwitchFrame Main Washer 6-1-1 Remaining Roll Paper Adjustment 6. Adjustments and Maintenance6-1 Adjustment 6-1-2 Paper Jam ※ Caution Turn off the printer power before cleaning 6-2 Maintenance Ok? On SMPS 7. Troubleshooting7-1 Power Problem 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 Select Ok? 7-6 Dip S/W and I/F PBA Select ProblemInput Ok? 7-7 RS-232C Serial Communication Problem 7-8 IEEE-1284 Parallel Communication Problem Reverse Mode 7-9 USB2.0 Communication ProblemMain PBA I/F Failure?