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The printer composed of main control board, printing cartridge, cutter, keys and buttons is connected to the 
mainboard via connectors or pinboard, Below is the connection diagram for the control board components: 

 

                                      Fig 2.2.1 Connection Diagram of USB+ Network Interface Control Panel 

 

 

                                      Fig 2.2.2 Position Diagram for USB+ Network Interface Control Panel   

               

2.3 Interfaces of the Printer   

Summary of Contents for XT890H Series

Page 1: ...1 Service Manual for XT890HW Desktop POS Printer ...

Page 2: ...2 Record of Changes Version Date Content of Change Made by Reviewed by Approved by ...

Page 3: ... 2 Interface for Cash drawer 11 2 3 3 USB interface 12 2 3 4 Serial interface 12 2 3 5 Ethernet interface 13 3 Keys Buttons Indicators and Functions 14 3 1 Paper Feed Key 14 3 2 Power Key 14 3 3 Power Indicator 14 3 4 Status Indicator 14 3 5 Paper Lacking Indicator 14 3 6 Description of the Printer s Status 15 4 Installation and Use 15 4 1 Connection of Interfaces 15 4 1 1 Connecting to power adap...

Page 4: ...3 Remove the blade light board and button stickers on the main body 25 6 1 4 Remove the printer interface iron plate main board and interface board 26 6 1 5 Remove the cover button flip cover 27 6 2 Assembly of the Printer 29 7 Cleaning of the Printer 30 7 1 Cleaning of Printing Head 30 7 2 Cleaning of Sensor Rubber Roller and Paper Path 30 Appendix Exploded View of the Printer 31 1 List of Parts ...

Page 5: ...e communication cable change of the printing head and maintenance of the printer is prohibited with power on before the printer and the computer is turned off 3 Take care to prevent from static electricity in processing the printing head or other electronic parts and elements 4 The time interval between power on and power off of the printer shall not be less than 20 seconds 5 The printer shall not...

Page 6: ...et Bluetooth and WIFI interfaces and the drivers for Windows XP Windows 7 Windows 8 Windows 10 Linux are provided for it 1 2 Main Characteristics Automatic paper cutting Low noise and high speed printing Design of easy drop in paper load structure is adopted Over heated protection of the printing head is supported Printing of marking paper and continuous paper is supported Compatible for paper of ...

Page 7: ... serial port USB network port Size of character ANK character Font A 1 5mm 3 0mm 12 24 dots Font B 1 1mm 2 1mm 9 17 dots Simplified traditional 3 0mm 3 0mm 24 24 dots Graph Mono color BMP image files and so on can be downloaded to FLASH Type of bar code UPC A UPC E JAN13 EAN13 JAN8 EAN8 CODE39 ITF CODABAR CODE93 CODE128 QR code QR Code PDF417 The Number of column Font A 42 columns or 48 columns Fo...

Page 8: ...48Kbytes NV Flash 256Kbytes Voltage input of adaptor AC 100 240V 50 60Hz Voltage output of adaptor DC 24V 2 5A Control of Cash drawer DC 24V 1A Working environment Temperature 0 45 Humidity 10 80 non condensing Storage environment Temperature 10 60 Humidity 10 90 Operating system Win 2000 Win 2003 Win XP Win Vista Win 7 Win 8 Win 10 Linux Physical dimension 130 140 133mm W D H Net weight 1 1kg 2 A...

Page 9: ...cator 4 Fixed knife assembly 5 Partition board 6 Rubber roller 7 Cutter and moving knife set 8 Cover opening button 9 Flip cover 10 Base 11 Gear of rubber roller 12 Black mark sensor 13 Back cover 14 Main body 15 Paper feed button 16 Power button 17 USB Interface 18 Serial interface 19 Network Interface 20 Cash drawer interface 21 Power interface ...

Page 10: ...s is connected to the mainboard via connectors or pinboard Below is the connection diagram for the control board components Fig 2 2 1 Connection Diagram of USB Network Interface Control Panel Fig 2 2 2 Position Diagram for USB Network Interface Control Panel 2 3 Interfaces of the Printer ...

Page 11: ...ash drawer Cashier box control 6 line RJ 11 socket output DC 24V 1A power signals to drive actions of Cash drawer 2 3 3 USB interface PIN SIGNAL NAME 1 24V 2 GND 3 N C SHELL F G PIN SIGNAL NAME 1 FGND 2 Drawer 1 3 SW 4 CASH 5 Drawer 2 6 GND 654321 ...

Page 12: ...12 2 3 4 Serial interface 2 3 5 Network interface PIN SIGNAL NAME 1 VBUS 2 D DATA 3 D DATA 4 GND PIN SIGNAL NAME 1 2 TXD 3 RXD 4 5 GND 6 DSR 7 8 CTS 9 ...

Page 13: ...13 3 Keys Buttons Indicators and Functions PIN SIGNAL NAME 1 TD 2 TD 3 RD 4 TXC 5 RCT 6 RD 7 8 9 GREEN 10 GREEN 11 YELLOW 12 YELLOW ...

Page 14: ...urn on off the printer 3 3 Power indicator The indicator light is blue in color When it is on the power of the printer is turned on and when it is off the power of the printer is turned off 3 4 Status indicator The indicator light is red in color 3 5 Paper lacking indicator The indicator light is red in color 3 6 Description of the printer s status Status of errors ...

Page 15: ...is over 4 Installation and Use 4 1 Connection of Interfaces 1 USB cable 2 Serial cable 3 network cable 4 Cash drawer cable 5 Power adaptor 6 Power cable 4 1 1 Connecting to power adaptor 1 Confirm that the power switch of the printer is in off state 2 Insert the cable plug of the power adaptor into the power interface at the rear of the printer with the flat and straight facing upwards 3 Turn on t...

Page 16: ... state 2 Insert the interface cable into a matching interface and fix it with the screw or snap spring on the plug 3 Connect the other end of the interface cable to the main engine 4 1 3 Connecting to Cash drawer 1 Confirm that the power switch of the printer is in off state 2 Insert the connecting cable of the Cash drawer into the interface for the Cash drawer at the rear of the printer Warning T...

Page 17: ...ion board is not mounted The paper roll with width of 83mm 82 5 0 5mm is supported Paper roll installation 1 Turn off the power of the printer 2 Turn on the cover opening button and open the flip cover of the printer 3 Place the paper roll into the printer minding the laying direction of the paper roll 4 Close the flip cover of the printer 5 Guide on Trouble shooting In case any fault occurs for t...

Page 18: ...aged Repair or change the mainboard Printing paper is not loaded correctly Load printing paper as per the requirements in the manual Printing quality is poor dim Paper quality is poor Use paper with equivalent quality Setting is not correct Improve printing concentration The printing head is damaged Change printing head Printing dirt Paper is dirty or paper quality is poor Check or change printing...

Page 19: ...ble with corresponding specification Driving cable for the Cash drawer is damaged Change the cable Driving circuit of the Cash drawer is damaged Repair or change the mainboard Cash drawer cannot be closed Driving circuit of the Cash drawer is damaged Repair or change the mainboard Fault Possible cause Solution Key or indicator does not work The cable for key indicator is not connected reliably Con...

Page 20: ...al but it does not print Connection between communication cable and the printer is not reliable Connect to the communication cable again The communication cable used does not meet the specification Use the communication cable matching with the printer The communication cable or connector is damaged Change the communication cable or connector The communication pinboard is damaged Change the communi...

Page 21: ...ng cable is damaged or not carefully Scraps of paper are accumulated Clean the scraps on transmission parts Paper is jammed Plate of driving head is over heated Lower heating power of the driving head Paper feed position is not correct Align edge of paper with the paper slot and put the paper between the rubber roller and TPH Paper is not cut off Blade is damaged or worn Change the cutter Paper is...

Page 22: ...aintenance tools Phillips screwdriver and combination pliers Auxiliary materials Lubricant alcohol absorbent ball and high temperature adhesive tape 6 1 Dismantlement of the Printer 6 1 1 Dismantlement of the base of the printer Picture Illustration External view of the printer A Use a Phillips screwdriver to remove the 2 H3 6mm screws fixing the base B Use a Phillips screwdriver to remove the 2 T...

Page 23: ...23 6 1 2 Removing the rear cover and main body of the printer Picture Illustration Remove the back cover 1 ...

Page 24: ...24 First remove the 7P cable connected to the motherboard then move the bottom of the main body away by hand then lift the main body up and finally gently remove the main body 2 ...

Page 25: ...llustration Use a small Phillips screwdriver to remove the 2 CA2 2 3 5 screws that secure the blade and then take out the blade Use a small Phillips screwdriver to remove the 2 PWB2 4 4 8 screws securing the light board and then take out the light board Remove the button sticker 3 1 2 ...

Page 26: ...ron plate main board and interface board Picture Illustration Use a Phillips screwdriver to remove the 4 PA3 8mm screws that fix the interface iron plate and then remove the interface iron plate and the main board Remove the motherboard 1 2 ...

Page 27: ...then remove the interface plate Use a Phillips screwdriver to remove the 2 H3 6mm screws that lock the left right brackets Picture Illustration A Use a small Phillips screwdriver to remove the 1 PB2 4 8 screw that fixes the cover opening button B Use a small Phillips screwdriver to remove the 2 PM3 3 8 screws securing the flip cover 3 4 1 ...

Page 28: ...28 Lift the cover open button upwards Lift the flap upwards 3 2 ...

Page 29: ...29 6 2 Assembly of the Printer Assembly is just the reverse sequence of dismantlement ...

Page 30: ...ck 3 Moisten the cotton cloth or cotton stick with medical alcohol and wipe off sticky foreign matters or other dirt with it 4 After cleaning parts do not use the printer immediately till alcohol has been evaporated completely 1 2 minutes and use the printer after it is completely dry When printing quality or paper checking performance is lowered clean parts Cautions 1 Make sure to turn off the po...

Page 31: ...ents 4 Interface board 19 switch plate shaft 5 frame 20 optocoupler components 6 Interface iron plate 21 optocoupler 7 base 22 Thermal film assembly 8 foot pad 23 switch board 9 printing core 24 paper compartment cover 10 flip cover 25 receiver 11 open button 26 optocoupler 12 blade 27 Rubber roller assembly 13 button stickers 28 open cover shaft 14 Light board 29 cover 15 Separator 30 Open cover ...

Page 32: ...32 2 Explode View of the Printer 3 Explode View of Cartridge of the Printer ...

Page 33: ...33 ...

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