| Problem | Likely Cause | Solution | | :--- | :--- | :--- | | | Corrupted firmware or wrong HW version | Re-enter DFU mode (short test pins while powering on). Re-flash correct firmware. | | Transistor tester says "Unknown Device" for known good parts | Outdated component library | Update to latest stable firmware (V2.0.3+ includes expanded library). | | Oscilloscope shows no signal even with probe compensation | Firmware ADC calibration lost | Perform "Self Calibration" in System menu (requires floating input). | | USB not recognized by PC | Entered wrong DFU mode or driver issue | Uninstall driver, reboot, reinstall STM32 DFU driver. Use a different USB port (USB 2.0 preferred). | | Battery shows 0% but works fine | Old firmware with incorrect battery profile | Update to V2.x. If persists, perform full discharge/charge cycle. |
Fixes for screen freeze issues, UI glitches, and signal refreshing lags. fnirsi dsotc2 firmware
The official FNIRSI firmware burning tools are designed for Windows operating systems. | Problem | Likely Cause | Solution |
The DSO-TC2 contains two distinct firmware files because of its dual-mode nature. According to the FNIRSI DSO-TC2 User Manual , you must upgrade these individually: CHD Prefix : Firmware for the oscilloscope portion of the device. CHT Prefix : Firmware for the transistor tester portion of the device. General Update Instructions | | Oscilloscope shows no signal even with
Download the specific firmware binary (.bin or .hex) matching your hardware revision.
Download the exact firmware file tailored for the DSO-TC2 (usually a .bin or .hex file) from the official FNIRSI website or verified community repositories.