The device should appear as a removable drive (usually named "FNIRSI" or "USB Disk") in Windows Explorer. Copy Firmware:
This indicates a firmware mismatch. You likely flashed a firmware file meant for a different internal MCU revision (such as flashing a DSO-TC3 file to a TC2, or mixing up internal board variants). Re-download the correct legacy version and flash it blindly or via forced bootloader mode.
Expands the database for identifying various transistors, diodes, and resistors.
: Since the TC2 is based on the popular "M-Tester" (LCR-T4) design, some enthusiasts have ported modified versions of the Karl-Heinz Kübbeler open-source tester software, though this often disables the oscilloscope functionality. If you'd like to dive deeper, let me know: Are you trying to fix a bricked device ? fnirsi dso-tc2 firmware
Short-circuit the three test slots (1, 2, and 3) together using a scrap piece of copper wire or a three-pin header. Press the button to start a component test. The screen will display a prompt to begin calibration.
Copy the .bin firmware file starting with MM into this "MM BOOT" disk.
What to check before updating
Look for a drive named "CH BOOT" on your computer. Action: Copy the CHD firmware file into this drive.
If a flash fails completely, the device might enter a hard bootloop. Attempt to force it back into Bootloader mode by holding down the boot button while plugging it into the PC, then attempt a fresh re-flash with a known stable version of the firmware. Conclusion
Manages component identification, hFE measurements, and LCR meter functions. 🔄 How to Update The device should appear as a removable drive
Firmware is the low-level software programmed directly into the DSO-TC2’s hardware. It controls how the oscilloscope displays signals, how the transistor tester detects components, and how the user interface reacts. Updating the firmware can:
You can locate authorized files on the FNIRSI Manuals & Firmware Center . ⚠️ Critical File Identification
Let the system automatically reboot itself to finish the process. 💡 Troubleshooting Notes Re-download the correct legacy version and flash it
FNIRSI occasionally changes the internal microcontrollers (MCU) in their production batches without changing the model name. Always open your device or use the software tool to read the chip ID before flashing a firmware file to prevent a hard brick. How to Check Your Current Firmware Version
Suggested next steps (practical, short):