1. Product Repair Guideline CITAQ V8

2. CITAQ V8 Parameter Parameter CPU Rk3188，1.8GHZ RAM 1GB FLASH
4GB iNand Flash
SD card
TF card, Max 32G
Display
8” with resolution 1024*768
Touch screen
8” multi-touch capacity screen
ports
3 USB, 1 RS232, 1 RJ11, 1 Lan 3G
WCDMA
WiFi
b/g/n
网络接口
LAN，100Mb/s
Indicator
Two color (Orange and Blue)

3. CITAQ V8 Parameter Parameter Speaker Dual track 2W Battery
3.7V/2000mAh
Power input
12V/1.5A 24V/2.5A OS
Android 4.4.4
Printer Mechanism
CAPM 347
Service life 200KM
Print Speed
200mm/s
Cutter
Half / Full cut
Life of Cutter
2 Million times
Width
80mm，Biggest diameter 80mm
Printer sensor
Short of paper, out of paper, cover opened
Peripherals
Flash driver with FAT32 format。USB scanner, mouse, keyboard, Cash drawer

4. 1.CITAQ V8 Disassembly

5. Press the cover button and lift the screen to open the cover
1.1 Appearance---Front
1：8’’ touch screen（Capacity）
2：Indicator
3： V8 cover
4：Side USB port 1 4 2 3
Press the cover button and lift the screen to open the cover

6. 1.1Appearance---Back 1 4 5 2 3 1：Power Switch 2：Lan Port
3：Rear USBX2, RS232 x 1
4：Adaptor port
5：Cash drawer port 1 4 5 2 3

7. 1.1 Internal view 4 2 3 1 5 1：Printer mechanism 2：Mechanism
3、4：Paper feeder rolls X4
5：SIM、TF card slot 2 3 1 5

8. 1.2 Host unit disassembly 1.2.1 Disassembly of Plastic Base
1、Take out screws marked
2、Turn the switch to a balance position
3、 Take out the plastic base from bottom to upwards 1 3

9. 1.2 Host unit disassembly 1.2.2 Disassemble the screen
1、Unscrew all screws marked in pic
2、Lift the metel piece and you will see the connect cable of the mainboard with printer board. 1 2

10. 1.2 Host Unit Disassembly 1.2.3 Disassemble the Screen cables
1、Pry the breaches pic showed by a small – type screwdriver
2、Lift the cover
3、Unscrew the screws pic marked and take out the metal piece covered with the cables. The 3G module is movable at the same time 1
Cable for 3G module 2 3G 3

11. 1.2 Host Unit Disassembly 1.2.4 Disassemble the base metal cover
1、Unscrew the marked screws and push the cover upwards
2、Will see the printer board after opening cover 1 2

12. 1.2 Host Unit Disassembly 1.2.5 Disassemble the printer board
1、Pull out all cables on board and remove screws to take out the printer board.
Switch Cable
USB Connect cable
Sensor
Screen signal cable
Printer Head
Printer mechanism cable

13. 1.2 Host Unit Disassembly 1.2.6 Disassemble the plastic frame
1、Unscrew the marked screws and open the cover
2、Disassemble the frame from metal host then pull out the sensor cable from the hole.
Sensor cable

14. 1.2 Host Unit Disassembly 1.2.2 Disassemble the sensor
1、Unscrew the marked screws to take sensor apart.
）Sensor signal receiver( it should be black)
Sensor transmitter(it should be transparent)

15. 1.2 Host Unit Disassembly 1.2.6 Disassemble the printer mechanism
1、Cut the marked plastic wire
2、Unscrew the marked screws then slowly pull out the connect cable
Connect cable
3、Pull out connect cable
4、Unscrew the marked screws and push downwards to take out printer cover lifter
打印头塑料翻盖提手

16. 1.2 Host Unit Disassembly 1.2.7 Disassemble the printer mechanism
1、Take out the connector from cable slot, then remove the screws to take out printer mechanism and ground cable
Ground Cable
cable slot and printer mechanism connector
Plastic base for printer mechanism

17. 1.3 Host Unit Disassembly 1.3.1 Disassemble screen back
WIFI Antenna
3G Antenna
3G Antenna cable
WIFI Antenna cable
1、Unscrew the marked screws to take out this cover
3G port
Touch screen cable
Speaker cable
LCD Cable
Indicator connect cable
Speaker cable
Battery Cable
Battery
Indicator board
Speaker

18. 1.3 Host Unit Disassembly 1.3.2 Disassemble Main board
1、Pull out WIFI cable
2、Push out the marked buckle and push out touch screen cable 1
3、Push out the marked buckle and push out LCD cable 8 2
4、Pull out Speaker cable 7
5、Pull out battery cable 3 6
6、Pull out indicator cable 4 5
7、Pull out speaker cable
8、Remove marked screws to take out the main board

19. 1.3 Disassembly of Screen 1.3.3 Disassemble speaker, battery, indicator, Wifi antenna and 3G antenna
屏幕上端
1、Tear the wifi circuit and ground sticker 1 2
2、Draw out 3G antenna circuit
3、Slowly pull the edge of battery to take it out
屏幕下端
4 and 5、Unscrew marked screws to disassemble speaker 3
6、Unscrew 3 marked screws to take out indicator board 5 4 6

20. 1.3 Disassembly of Screen 1.3.4 Disassemble metal fixture of screen
1、Remove marked screws to disassemble the metal fixture
Pls protect the cable between touch screen and LCD when disassembling

21. 1.3 Disassembly of Screen 1.3.5 Disassemble LCD Panel
1、First to pull up the edge of LCD as pic marked. Then subsequently pull up the buckles from 1,2,3 point to disassemble LCD panel 1 3 2
Pls protect the cable between touch screen and LCD when disassembling

22. 1.3 Disassembly of Screen 1.3.6 Disassemble touch screen
1、Firstly heat up the edges which marked in pic 1 by a thermal blower.. Stop until it turns a little hot
2、Gently push the touch screen towards the side without cables
3、Carefully pull out the cable from the hole after separating the touch screen and frame 3 1 2
Pls protect the cable between touch screen and LCD when disassembling

23. 2.CITAQ V8 FAQ

24. V8 FAQ and solution 1、Eliminate the black screen when turning on
Try to replace LCD panel and see if the device starts. If it were still black screen then pls replace main board
2、Eliminate the problem of printing blank：
Check if the mechanism connector looses or printer board connector looses. If problem still exists then replace printer board
3、Eliminate the printing malfunction：
The beeper keeps beeping after loading paper, then the printer board must be replaced
4、Eliminate the problem of no 3G signal：
Make sure if the sim card is with allowance. Change the sim card first. If the problem still exists, try to change 3G module. If it still doesn’t work, then change the mainboard.
5、Unable to connect to internet by LAN：
Restart the device. If problem exists, change the printer board.
6、无法跳电磁阀故障排除：
Check if there is paper inside. If problem exists, then need to change printer board.

25. V8 FAQ and solution
7、Fault resolution of USB port no response:       Restarting device if still no response, then it requires changing printer board.
8、Fault resolution of screen too bright:       Connecting external LCD panel, if still the same, then it requires changing        main board
9、Fault resolution of buzzing after install printing paper roll, or "beep, beep, beep":       The printer board should be changed.