How to Troubleshoot PAX S300 ?

PAX S300

Troubleshooting when PAX S300 terminal doesn’t communicate with DolphinPOS App

  1. Power cycle terminal (remove power cable from terminal for 5sec and reconnect) try transaction again.
  2. Make sure to connect LAN Ethernet cable to red port of the cord.
  3. First make sure both PAX & iPad are on same network
    • Hold “F+1” keys together
    • default Password is today’s date mmddyyyy (example march 13th 2020 i.e 03132020)
    • press down arrow to go to “communication” option
    • press communication
    • type in password (today date)
    • press down arrow two times
    • press “LAN Parameter”
    • Note down the format of IP Address (
    • Press enter
    • Press down arrow & go to “ ping” option and press “green” button
    • If DNS resolve error appears (your internet may be down please confirm)
    • If ping ok, click red ‘x’ button, and press ‘x’ button 3 times to go to main screen.

You can see YouTube video link of DolphinPOS for the same HERE

iPad APP

  1. Click on dolphin pos App (restaurant/retail) on iPad and go to main screen
  2. Go to More -> credit card processing -> and press “Integrated PinPad”
  3. Select card provider to “TSYS” from the dropdown
  4. Change IP Address to same as PAX S300 (which is noted from above).
    • Example in PAX s300 if it is , then in iPad it should be
    • Example in PAX s300 if it is , then in iPad it should be
  5. Port No : 10009. That’s it you are good to go !
  6. If this troubleshooting guide did not help. please contact support numbers for DolphinPOS , or PAX Terminal Hotline
How to Troubleshoot MC PRINT3 ?

MC Print3

Troubleshooting for Non-Communicaton to DolphinPOS

  1. Open iPad “Settings” go to Bluetooth pair to mc print3 (only one device can be paired to mc print3 using bluetooth)
  2. Open Dolphin POS APP now try to give a print.
  3. If you are using LAN connecton connect LAN hard wire to mc print3
  4. Connect your iPad WIFI to same network as of mc print3
  5. Open DolphinPOS APP go to “MORE” then go to “General” scroll down to “Printer IP”
  6. Type mc print 3 IP Address & in bottom of the page click “Sync Profile”
    • Example if it is , then in iPad it should be
    • Example if it is , then in iPad it should be
  7. If you are using with USB, connect USB to mc print3 and Your iPad
  8. If above troubleshooting does not work contact DolphinPOS or Star
How to Troubleshoot Star TSP 650 Ⅱ ?

Star TSP650 Ⅱ

Troubleshooting for Non-Communicaton to DolphinPOS

  1. Connect the device to power supply you can see Green light on front of the device
  2. In your iPad open “setting” go to Bluetooth Pair with TSP 650 Ⅱ(only one device can be paired withTSP 650 )
    • To pair with TSP 650 on the back side of the device press and hold the pair buton and pair with your iPad
  3. Make sure there’s paper roll inserted correctly in the device.
    • If paper is not inserted correctly “error” light indicates i.e red light
    • To check paper is correctly inserted press feed buton on front of the device
How to Troubleshoot Epson Kitchen Printer TM-U220B with LAN E04 ?

EPSON Kitchen Printer (TM-U220)

Troubleshooting for Non-Communicaton to DolphinPOS

  1. Make sure printer is turned on
  2. Connect LAN hard wire to Device
    • In iPad open DolphinPOS APP go to “MORE”
    • In left hand side menu go to “Setup” then “General” scroll down till you see “WebPrint”
    • Turn on “WebPrint” scroll down & tap “Sync Profile”
  3. Make sure paper roll in inserted correctly in device
  4. If not error light indicates that paper out on front of the device
Why my printer is not printing receipts ?

Can be caused by few things first go to settings icon and click Bluetooth and see if the receipt printer is connected. If not, then you will need pair the device with the iPad which can be done by turning off the Bluetooth and printer and then turn the Bluetooth on again and printer and hold the pairing Bluetooth button behind the printer for 10 to 15 seconds and let go and select the printer till its connected. Next thing to check would be the starprint sdk icon click on it then select in the destination your current receipt printer by first selecting Bluetooth, then tsp650II, select high when open then simply select sample underneath printer, click English, click 2” (384dots), click first line En 2” Text Receipt for a test print send command should come as success press ok and log back into your dolphin pos application.

Why my barcode scanner is not scanning ?

Can be caused by a few things first go to settings icon click on Bluetooth then see if your barcode scanning device is connected or not, if not than you will need to turn of your barcode scanning device and Bluetooth and turn both on again and try to click on barcode scanner device on iPad to pair. Connect Apple iOS device in Application Mode Please check with your scanner application vendor or visit to confirm your scanner-enabled application supports the scanner. If you are using the scanner with an Apple iOS device and a scanner-enabled Application that does not provide instructions how to connect your scanner, please use the following steps.

  1. Power on the scanner. Make sure the scanner is discoverable (unpaired). The Blue light should be blinking fast.
  2. To change the profile to Application Mode scan this barcode. The scanner will beep 3 times. Use with iPad, iPod touch, and iPhones. (Scanning this barcode changes the connection mode) (Continue on page 17) APPLICATION MODE
  3. Turn on Bluetooth on the Apple device. Go to Settings > Bluetooth. A Bluetooth Devices search will begin.
  4. Tap Socket 7Xi[xxxxxx] in the list of Devices found. After a few seconds the “Not Paired” status will change to “Connected” or “Paired” and the scanner’s blue LED will blink every 3 seconds, confirming the connection. Note: The characters in brackets are the last 6 characters of the Bluetooth address. The full Bluetooth address is printed on the Product label.
  5. Launch your Scanner-enabled Application. The scanner will beep once indicating that it is connected to the appropriate application. Now you are ready to scan barcodes.
Why my credit card processing pinpad gets disconnected ?

Go to setup on the app select card and then select configure pinpad make sure all data points are there such as prefilled device id and merchant id and terminal id and operator id and pinpad id is 0 and then press configure pinpad red button to reconnect to the pinpad can take few minutes. Make sure your internet is not open access as it might cause pinpad to lose connection so have secured internet at your location to avoid getting disconnected.