Issue: POS says “Printer busy / exclusive mode required”
│
├─ Are you using OPOS? → YES → Enable Exclusive in SetupPOS
│ NO → Go to next step
│
├─ Two apps printing? → YES → Set APD to “shared” (disable exclusive)
│ NO → Reinstall standard APD driver
│
└─ Still problem? → Use “TMUSB” driver (not Windows printer driver)
This is for users who want to print from normal Windows applications like Microsoft Word or Notepad. It allows the TM-U220D to act like a standard Windows printer. This is not the exclusive driver for POS, but it is useful for testing.
| Problem | Likely Cause | Solution |
|---------|--------------|----------|
| “Port is already in use” | Another driver (e.g., Microsoft Fax, USB printing support) claimed the port. | Remove all other printers using that COM/USB port via Device Manager → Show hidden devices. |
| POS prints gibberish | Wrong driver (Generic/Text) interfering. | Rebind to Epson APD only. |
| Paper out not detected | Shared driver filtering status bytes. | Enable bidirectional support in APD and OPOS. |
| After Windows Update, driver changes | Windows installed its own “TM-U220” driver. | Use “Set this driver as exclusive” via local GPO: Computer Config → Admin Templates → Printers → Disable driver replacement. | epson tm u220d driver exclusive