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I recently got a little bored and bought two units. When they arrived, both could power on normally, but one of them had a channel that didn’t work. I left them idle for two months, and when I powered them on again, disaster struck: one flashed the grid briefly and then went gray, and the other got stuck at the English welcome screen. Then I held down the reset button, and in the end, it also turned gray. Now I can’t do anything with them. I really hope some expert can save my babies. (Welcome to the world of signal explorers) I forgot to save the pics. I’d be really grateful!
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在隔壁帖子找到的图片
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English please.
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I recently got a little bored and bought two units. When they arrived, both could power on normally, but one of them had a channel that didn’t work. I left them idle for two months, and when I powered them on again, disaster struck: one flashed the grid briefly and then went gray, and the other got stuck at the English welcome screen. Then I held down the reset button, and in the end, it also turned gray. Now I can’t do anything with them. I really hope some expert can save my babies. (Welcome to the world of signal explorers) I forgot to save the pics. I’d be really grateful!
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Hi rowth,
The scope in the pic that you attached is stuck in the boot mode and need to load the firmware.
You would need windows PC, USB type A to B (Printer USB cable), a firmware image (attached), WinUSB_Test (attached), USBTreeView and Zadig (program to install driver).
First, you will need to hold the SHIFT button then press the power button. You can let go the SHIFT button once the System update utility screen shows up.
Then you need to wait it to initialize. Once it done, Connect it to your PC then press the F3 button that labeled "F3:USB" on the screen.
The unknown device should show up as "DL series" in the Device manager.
Next, you gonna need the program called Zadig to install the driver. Open the program as admin then select the device "DL series" then click on the small up arrow button until you select the "WinUSB". After that hit the Install driver, wait for it to install. You should be greeted with "The driver was installed successfully". You can click OK then close the Zadig.
Now, you need to obtain the USB GUID of the scope because the WinUSB_Test app needed it. I'm not sure if there is/are better way(s) to do this. But what I recommend is to download the UsbTreeView program and you can copy the GUID number. You can then launch WinUSB_Test app. Paste the copied GUID of the scope. Hit the refresh button and select "DL series (SN:)" in the drop down menu.
Under "Bulk/Interrupt Transfer" section, set Interface to 0. Under the OUT Transfer, select endpoint 1. Then select the "g5e.bin" file and hit Start Transmission. You should see the transfer process on your scope. It will take a while and once it done. It will automatically reboot in 5 seconds.
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Firmware and the WinUSB_Test here in the attachment
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Thanks, my friend. I'll go back and try later to see if it works. I tried the shift key last night, but it didn't seem to respond.
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can you correct your 1st thread title to include english text, you can edit it ...
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Tried it all day and found that the buttons don't respond at all. The capture board gets really hot. Could it be a short circuit causing unstable voltage, which then leads to a black screen?
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Which part of the acquisition board that gets hot? The analog frontend module ? (I suspect that module since mine also quite warm to the touch when operating). You can temporary remove these two modules and power up the scope. It would be helpful too if you can point where it is getting hot in a picture.
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Like always, did you check the power supply?
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Rowth,
You did an extraordinary job.
https://tinlethax.wordpress.com/2025/11/22/dl1740e-repair/
In my day, I had solved one, but it was a bit too complicated without informations.
https://www.eevblog.com/forum/repair/oscilloscope-yokogawa-ld1640/
Thank's for all users
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I didn't install the entire front board, powered it on for testing, and it's still a black screen. The A6236LG is insanely hot, and there are four ICs on the back. Seems like they run on 3.3v, and all the heating ICs are taken off. There are pictures later.
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I didn't install the entire front board, powered it on for testing, and it's still a black screen. The A6236LG is insanely hot, and there are four ICs on the back. Seems like they run on 3.3v, and all the heating ICs are taken off. There are pictures later. (Attachment Link)
Well, my scope also suffered the A6236LG (Trigger chip) failure. I managed to source it from Alibaba. But you can find it on Taobao also.
Mine shorts from -5V to 3.3. You can refer to my personal blog posted by GGMM. -
Hello, my friend. Can you put your blog link here? I couldn't find the chip on Taobao, so I tried my luck on Yahoo.
IMG_20261102_142625.jpg