loader

| Problem | Likely Cause | Solution | |---------|--------------|----------| | “Communication timeout” | Wrong COM port, driver missing, or radio not powered on. | Check Device Manager; power cycle radio; try COM1..COM8. | | Radio beeps but no read | Incorrect cable (some Kenwood cables lack the resistor for Hytera). | Use a genuine Hytera or confirmed compatible cable. | | “Model mismatch” | Using TC-610 CPS on TC-620 or vice versa. | Ensure CPS exactly matches your radio model. | | Write fails at 50% | Serial buffer overflow – USB issue. | Lower PC’s CPU usage; use a native COM port or quality FTDI cable. |

: A PC26 programming cable is required. The accessory connector for programming is located on the right side of the radio.

❌ Avoid random “free download” sites unless you scan files thoroughly. Many contain malware or incorrect versions for the TC-610.