Owon Hds2102s Firmware Update Fix -

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Title: [Guide] Fixed my Owon HDS2102S Firmware Update Issues (White Screen/Boot Loop)

Body: Hey everyone,

I recently tried to update the firmware on my Owon HDS2102S to the latest version and ran into a snag. After running the update, the scope was stuck on the boot logo (and eventually went to a white screen). For anyone else facing this, here is how I managed to fix it.

The Problem: It seems the internal SD card formatting can cause the update process to hang if the previous firmware isn't cleared out properly, or if the update file is corrupted during transfer.

The Fix: I had to perform a manual forced update. Here is what worked for me:

Result: The unit booted up successfully with the new UI and improved waveform update rate. If you are still stuck, try using a different USB cable—the connection drops easily during file transfer on these units.

Hope this saves someone the headache I went through!

If the update fails or the device is stuck, try these fixes:

(Community forums and vendor documentation were consulted; specific URLs and forum threads are omitted per instructions.)

Acknowledgments Thanks to community contributors who shared recovery notes and to lab technicians who assisted with hardware procedures.

Owon HDS2102S Go to product viewer dialog for this item. Firmware Update Fix: Essential Guide Owon HDS2102S

is a highly capable 100MHz handheld oscilloscope, but like many devices in the HDS200 series, it has undergone several hardware and software revisions. Users often seek firmware updates to fix specific bugs, such as display discrepancies at narrow time divisions. However, updating these devices requires caution due to version incompatibilities. Known Issues and Version-Specific Fixes Firmware updates for the

are primarily released to address UI bugs and measurement inaccuracies. 2ns/div Display Bug: Earlier versions of the

featured a display error where graticules were incorrectly spaced at the 2 nanoseconds per division range. For example, a 50 MHz signal (20ns period) would incorrectly appear as having a 16ns period.

The Fix: Updating to firmware version 1.5.1 or later resolved this issue, ensuring the waveform duration matches the physical signal. owon hds2102s firmware update fix

Trigger Sensitivity: Some users on EEVblog have reported trigger sensitivity quirks in version 4.1.0, noting that the device may only trigger reliably above 0.3 divisions.

RMS Measurements: Advanced features like specific RMS measurement commands may only be available or stable in firmware versions 4.7.1 and above. Critical Warning: Compatibility and Hardware Revisions

Before attempting an update, you must verify your device's current version. Owon updates are locked to specific hardware generations.

The "V" Rule: You can typically only update to a firmware version that shares the same leading digit as your current one. For instance, if your device is running V4.x.x, do not attempt to install V1.5.1 or V2.0.4, as this can cause critical failures.

Non-Upgradable Units: Some older hardware revisions used flash chips (like "Gigadevice") with hard-coded checksums that make them effectively non-upgradable.

Owon’s Official Stance: Due to the complexity of these revisions, Owon support has occasionally advised users not to upgrade unless a specific fix is required for their serial number. How to Check Your Firmware Version

To identify your current version, navigate to:System Button > F2 (System) > F4 (About).Record your version number and serial number before visiting the Owon Download Center. Step-by-Step Firmware Update Process

If you have confirmed that a compatible update exists for your hardware, follow these steps: What is the latest FW version for OWON HDS2102s? - EEVblog

The Owon HDS2102S had a notorious "glitch" where signals at the 2ns/div setting appeared stretched or incorrectly scaled, effectively lying to the user about their frequency. This was finally resolved with the release of Firmware v1.51. The Core Fix: Accuracy at 2ns/div

Before the fix, a 50 MHz signal displayed at the fastest horizontal scale (2ns/div) showed one full cycle taking up eight divisions—an incorrect 16ns period.

The Update: After flashing v1.51, the same signal correctly shows half a cycle taking up five divisions, confirming the accurate 10ns duration for a 50 MHz waveform.

Why it mattered: Without this fix, the device's highest-speed captures were mathematically unreliable for high-frequency measurements. How to Apply the Update

The update process for the HDS200 series uses a "Mass Storage Class" (MSC) method rather than a dedicated flash tool:

Preparation: Download the correct firmware file (typically named Scope.upp) from the Lilliput (OWON) Download Center.

Enable Upgrade Mode: On the scope, press System, navigate to the second page of the System menu (usually F2), and select Upgrade. Best for technical communities where you want to

USB Connection: Connect the scope to your PC. Change the USB setting to MSC. A removable disk drive will appear on your computer.

Transfer & Reboot: Copy the Scope.upp file directly onto the removable disk. Power the scope off and then back on.

Completion: The scope will automatically run the upgrade and shut down when finished. Troubleshooting & Version Confusion

"Unupgradable" Units: Some early hardware versions (identifiable by serial numbers) used Gigadevice flash chips with OTP SecureRom, which may prevent firmware updates entirely.

The Version Gap: Users have reported receiving new units with versions like v4.3.0. If your device has a version higher than v1.5.1, you likely already have the fix and should not "downgrade" to older v1.x firmware files.

DMM Performance: Note that switching to DMM or Function Generator mode can sometimes slow down data acquisition speeds; a full restart usually restores performance. To see the before-and-after comparison of the display fix:

Visit the official OWON Download Center and select the HDS200 Series.

Verify Hardware Version: It is critical to match the firmware to your hardware. Check your current version in the System > Info menu on your scope.

Download the Package: Look for the specific HDS2102S update file (often a .upp or .bin file). 2. Prepare the Device for Transfer Result: The unit booted up successfully with the

The HDS2102S uses a simple "drag-and-drop" method for updates by appearing as a removable drive on your PC. Turn on the oscilloscope. Press the System button.

Select F2 (System), navigate to the next page, and select Upgrade. Connect the scope to your PC via the USB-C cable.

In the System menu, ensure the USB mode is set to MSC (Mass Storage Class). 3. Perform the Flash

When the scope appears as a removable disk on your PC, copy the downloaded firmware file (e.g., Scope.upp) directly to the root directory.

Once the transfer is complete, safely eject the drive from your PC.

Power Cycle: Turn the scope off and then back on. The device will detect the file, begin the upgrade automatically, and then shut down once finished.

Turn the scope back on and verify the new version number in the System menu. Troubleshooting Common Update Failures

Upside-Down Screen: If your display appears flipped after an update, you likely flashed firmware meant for a different hardware revision. You must find the specific firmware version compatible with your hardware serial number to revert the change.

Device Not Recognized: If your PC doesn't see the scope, try a different USB-C cable (some are "charge only") or ensure you have manually switched the device to MSC mode in the menu.

"Update Failed" Message: Ensure the firmware filename matches exactly what the device expects (usually Scope.upp). Do not put the file inside a folder on the device. Hardware Version Recommended Firmware Key Change V1.0 Fixes 2ns/div graticule bug V3.0 General stability and UI fixes V4.0+ Includes RMS measurements

For more advanced support or archived firmware files, the EEVblog Forums maintain a community-driven repository of various hardware-specific versions.

This assumes the device is stuck, fails to boot, or shows erratic behavior after an update attempt, and provides a structured fix procedure.

If the scope is stuck on logo:

If no recovery mode is available, proceed to Step 3 (normal update attempt).