BIXOLON Maintenance, SRP-350/352plusA&C, ※ Caution Turn off the printer power before cleaning

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6-2 Maintenance

SRP-350/352plusA&C

6-2 Maintenance

Paper dust in the heating elements may lower the print quality.

In this case, clean the print head as follow;

※Caution: Turn off the printer power before cleaning.

※Caution: Note that the thermal head (Thermal element and Radiation plate) becomes very hot during normal operation, creating the danger of burn injury. Be sure to wait for about 10 minutes after turning printer power off before beginning the cleaning.

1.Open the cover-open.

2.Clean the thermal element (the area that looks like it is marked a thin black line) of the thermal head with a cotton swab moistened with an alcohol solvent. (ethanol, methanol, or IPA)

3.After confirming that the alcohol solvent has been dried up completely, close the cover open.

Radiation plate

Head tip

Spring pin

Print circuit board
Connector	Heat sensitive	Electrode
	layer	Electrode
		Resistor
		Board
	Base
	Protective
	layer

※Note: Never touch the thermal element with your hand. Doing so can damage the thermal element.

※Note: Do not scratch the printer head.

Rev. 2.01

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Contents Thermal Printer Rev Service ManualSRP-350/352plusA&C 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. 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 2-1-1 AC Adapter Installation 2. Installation and Operation2-1 Installation 2-1-2 Interface Cable Installation2-1-5 Wall Mount Installation SRP-350/352plusA&C 2-2-2 Setting the DIP switch RS-232C Serial Interface 2-2 Operation2-2-1 Setting the DIP switches 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 3-4-2 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 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 ConnectionFigure 4-1 Board Wiring Diagram 4-1 Wiring Diagram4. Hardware 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 CircuitUPD70F3107 4-3-4 I/F PBA Detect Block Diagram4-3-5 RS-232C Communication Block Diagram 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 Slip6-1-1 Remaining Roll Paper Adjustment 6. Adjustments and Maintenance6-1 Adjustment 6-1-2 Paper Jam 6-2 Maintenance ※ Caution Turn off the printer power before cleaningOk? 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 Failure? 7-9 USB2.0 Communication ProblemMain PBA I/F Reverse Mode