Electronics > Repair
Siglent spd3303x-e reboot problem
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tautech:

--- Quote from: opiwahn on March 15, 2024, 10:38:40 am ---
--- Quote from: tautech on November 18, 2023, 09:26:01 am ---A warranty repair just done...installed the new version control PCB with uprated bridge rectifier.

--- End quote ---
I bought a brand new SPD 3303X-E (in Sept. 2023) and I wonder whether it could be affected by this reboot issue (up to now no problems yet). The hardware version is reported to be V6.1, can anybody tell me if this includes the uprated rectifier? I could open it up, but I don't want to break the warranty seal ... Thanks!

--- End quote ---
Welcome to the forum.

Check the display symbols when in Series or Parallel mode.
The newer HW has more than just a symbol shown in these modes.
opiwahn:
In parallel and serial mode, there is an additional blue text field which displays the added voltage/current. Is it this text field I have to look for?
tautech:

--- Quote from: opiwahn on March 15, 2024, 08:59:58 pm ---In parallel and serial mode, there is an additional blue text field which displays the added voltage/current. Is it this text field I have to look for?

--- End quote ---
Yep, indicates latest HW.
44kgk1lkf6u:
I want to point out that it is not necessary to remove the broken bridge rectifier.  It breaks with 1 of its 4 diodes either being open or having a large resistance.  It is only necessary to add a good diode in parallel with the bad diode.  In my case the broken diode was connected to the fuse.  So I soldered a diode between the fuse holder and the linear regulator.  It is the SOIC-8 chip next to the fuse and the connector.

As this Florida man pointed out, it is hard to access the other side of the board to remove the bad bridge rectifier.

https://www.eevblog.com/forum/testgear/sdp3303x-hiccup/
qpit3a:
Hi yeah true but given consensus is bridge fails due to heat and that it is under-specified then probably best to replace with upgrade as rest of bridge probably will fail eventually.

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