Products > Test Equipment
SPD3303X Hiccup
mawyatt:
For some reason we can't locate the thread that references the overheating Bridge Rectifier in the SPD3303X causing the PS to Reset.
Disclaimer, this is NOT recommended, approved, nor good engineering/repair, work just simply lazy temporary solution!!
We have little patience and time, and the CEO already has tasks aligned for us; fix the dishwasher, clean the rug cleaner, measure the pool chairs for fabric replacement (now that's a real PITA as we've already done a couple), remove the baseboard in the back bedroom, take the garbage out and so on!!
When our SPD3303X Hiccuped the other day, we thought, "yep we need to replace the overheating bridge rectifier", however we have 3 SDP3303Xs and that's a lot of work!!
After taking the culprit SPD3303X cover off and locating the Bridge Rectifier, we began to understand what was entailed in replacing such, realizing no way were we going to remove the front panel PCB, remove rectifier, replace such, reinstall PCB, and so on, and for 3 PSs, way too much work!!
So we began to think a dumb, cheap, easy, lazy, redneck patchwork, procrastinating solution, and came up with "lets just put a heatsink on the Bridge Rectifier for now on the only PS that has had a Hiccup, and see how this works!!" :palm:
Well, it's been running a couple days now without a Hiccup (Reset)!! ::)
Anyway, we've justified our solution for now as it's apparently not Resetting, so "If it ain't broke don't fix it" :o
BTW we've noted this particular SPD3303X so we won't use it in any critical applications (we have 2 others). Much later when time permits we'll tackle this with the proper rectifier replacements, we already have those in-house!!
Best,
Kean:
It would be good to fix the product code in the subject - it should be SPD3303X not SDP3303X
Maybe you were also searching for old posts using the wrong code?
KungFuJosh:
https://www.eevblog.com/forum/repair/siglent-spd3303x-e-reboot-problem/
https://www.eevblog.com/forum/repair/siglent-spd3303x-e-rebooting/
Some of them already have heatsinks on that part. I don't know why they all didn't, but even with that, some have failed.
My DC Load might actually show up soon, we'll see how mine does.
Thanks,
Josh
tautech:
--- Quote from: KungFuJosh on August 18, 2024, 11:42:22 pm ---https://www.eevblog.com/forum/repair/siglent-spd3303x-e-reboot-problem/
https://www.eevblog.com/forum/repair/siglent-spd3303x-e-rebooting/
Some of them already have heatsinks on that part. I don't know why they all didn't, but even with that, some have failed.
My DC Load might actually show up soon, we'll see how mine does.
Thanks,
Josh
--- End quote ---
The bridge in question only supplies the digital circuitry therefore PSU loads should have no additional effect on its loading.
KungFuJosh:
--- Quote from: tautech on August 18, 2024, 11:49:01 pm ---The bridge in question only supplies the digital circuitry therefore PSU loads should have no additional effect on its loading.
--- End quote ---
I thought it got hotter under load? How can I test that part?
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