JBC DDE-2B bricked after firmware upgrade - no fix? - Page 1
Forum section: electronics / repair

author: omegat
author_rank: Newbie
timestamp: July 02, 2023, 06:33:13 pm
content: Hi,I am the (kinda) proud owner of a used JBC DDE-2B (220V) station. After cleaning it up (it went through it's paces with the former owner, but was fully functional) I wanted to upgrade the firmware to 8886448. So I prepared the stick, put it in and started the upgrade. It immedialtely crashed. I tried that 1 or 2 times, after which it didn't recover after powercycling. I then tried the 'recovery' method mentioned in this thread:https://www.eevblog.com/forum/repair/jbc-dme-bricked-during-firmware-updatewhich miraculously brought a progress bar, which eventually stopped. Needless to say nothing happened after that. So I powercycled it after waiting for some time (several minutes).Now, as you might guess, the station is completely bricked and the 'recovery'-trick is not working anymore either. It only shows a black screen and is completely inert. Except that I can see with my scope that the station is accessing the USB-Stick (I don't have a USB sniffer but I can see activity on D+ and D-)So... you guys have any advice (except maybe to *not* upgrade the firmware on your JBC)? I find it kinda hard to believe that you can brick your equitment with a firmware upgrade nowadays... :/Thanks in advance,Tobi

author: Qw3rtzuiop
author_rank: Frequent Contributor
timestamp: July 03, 2023, 03:28:27 am
content: I had the same problem. A different USB drive solved it.

author: omegat
author_rank: Newbie
timestamp: July 03, 2023, 04:53:27 am
content: I will definitely try that after work. The station seems also kinda picky when it comes to USB sticks. I used the same one it liked for the failed firmware upgrade (I had no luck with 4 (!) other sticks...).

author: omegat
author_rank: Newbie
timestamp: July 04, 2023, 07:08:17 pm
content: So to share the status quo:I am in contact with JBC support. They sent me 3 custom firmware files with which we were able to flash the display-unit to the current version. But the station then failed to flash the back PIC-µC. That resulted in the station not recognizing the tools and trying to reflash the µC everey couple seconds. We tried to correct that problem with another custom firmware file but that bricked the station again.So JBC support suggested to send the station in for repair.

author: 555
author_rank: Newbie
timestamp: July 21, 2023, 03:52:07 pm
content: I’m trying to update my NASE-2B from 8886166 to 8886448 (i see this is the same FW than yours for the DDE-2B which might be possible because the UI looks the same). First 2 USB sticks froze the device, no response even after waiting 15 min.. 3rd USB is recognized and i can start the update, but the progress bar freezes at around 10%. Waited 30 min to be sure nothing was happening and rebooted the unit which to my relieve booted with the old FW with all settings reset to factory. I have tried with other sticks, other format options but the result is always the same. I would expect to brick a 'budget' device with a FWupdate but not something in this price category. I have sent them an email and will let you know how it went.

author: 555
author_rank: Newbie
timestamp: July 30, 2023, 04:47:36 pm
content: Hi, the update finally succeeded with this tip from the manufacturer: First insert the usb stick (FAT32) with the .jpu file and only then turn on the device (in spite of the description in their manual, which asks to wait until the update symbol appears on the display, and then confirm with the 'i' key). Behavior: the screen remains completely black for almost 10 minutes (which ofc seems much much longer...). Afterwards, an orange progress bar appears (nothing else). This one also froze 2x, but the 3rd attempt it succeeded. Maybe this info can help someone.

author: zaza772
author_rank: Newbie
timestamp: August 03, 2023, 07:50:45 pm
content: SW: 8886403 : JBC_DD_Station : 01 : DD_8886403.jbc : 2018/09/18SW: 8886417 : JBC_DD_Station : 01 : DD_8886417.jbc : 2018/10/16SW: 8886520 : JBC_DD_Station : 01 : DD_8886520.jbc : 2019/04/03convert 8886520.jbc to 8886520.hex and then write with ds30 Loader

author: moeyekung
author_rank: Newbie
timestamp: July 13, 2025, 03:10:43 pm
content: Can you convert jbc to hex I have brick CD-B Model.

author: moeyekung
author_rank: Newbie
timestamp: July 14, 2025, 08:44:36 am
content: Quote from: zaza772 on August 03, 2023, 07:50:45 pm