Products > Test Equipment
Korad KA3005P power supply: UI changes
ebastler:
--- Quote from: MikeK on April 13, 2021, 05:53:44 pm ---Have you imaged the inside?
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I have briefly looked inside to check for proper grounding, but have not taken any pictures, sorry. I'll open it again and add some photos here over the next couple of days. All nice and tidy on the inside; in addition to the cable ties and tidy routing I knew from photos, I noticed that they have secured all plugs with some white glue (presumably removable...).
The only thing that struck me as strange was that the power PCB attached to the heatsink is actually comprised of two PCBs sitting next to each other. Each pretty exactly half the size of the heatsink, mounted by two shared screws in the middle plus separate screws near the outer edges. The leads from the transistors (?) on one PCB were soldered to both PCBs to contact them, if I saw that correctly. Not sure what cost-savings or reliabilty improvement that is meant to bring?? I will look more closely and try to get photos of this part too.
MikeK:
--- Quote from: ebastler on April 13, 2021, 06:05:26 pm ---The only thing that struck me as strange was that the power PCB attached to the heatsink is actually comprised of two PCBs sitting next to each other. Each pretty exactly half the size of the heatsink, mounted by two shared screws in the middle plus separate screws near the outer edges. The leads from the transistors (?) on one PCB were soldered to both PCBs to contact them, if I saw that correctly.
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Yep, mine's the same:
ebastler:
--- Quote from: MikeK on April 13, 2021, 06:19:19 pm ---Yep, mine's the same:
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Many thanks for the pictures! Yes, exactly the same in mine, including the elegant two-tone look of the PCB in black and green. ;)
Same glue on the plugs as well. So it seems that they only changed the LED colors and the firmware in the most recent revision.
YurkshireLad:
It just occurred to me that this KA3005D has the LOCK LED. Does that make this one an original version or an updated version? Or did the KA3005D always have it? Confusing.
https://www.amazon.ca/dp/B0084JFWNY/
ebastler:
--- Quote from: YurkshireLad on April 13, 2021, 06:56:08 pm ---It just occurred to me that this KA3005D has the LOCK LED. Does that make this one an original version or an updated version? Or did the KA3005D always have it? Confusing.
https://www.amazon.ca/dp/B0084JFWNY/
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As mentioned in the original post above, I believe the KA3000 series originally started out with the LOCK LED. Then at some point Korad thought it would be a good idea to offer the 5th memory -- without adding a 5th button for it, hence the awkward way of addressing it indirectly via the encoder. Most recently, with the introduction of the overloaded LOCK button (short and long press), having a clear indication for the LOCKed status became more important again; so they dropped the 5th memory and went back to a LOCK LED.
I guess the picture in that Amazon offer shows a very early version of the power supply, since it does not have the green display. I have seen these pictures occasionally, also in some of the old instruction PDFs that float around on the 'net. It's probably not the exact version they ship; unless they have very recently received new stock you would likely still get a unit with the "M5" LED.
But hey, it's "Certified frustration-free" according to the seller, so what could possibly go wrong? ;)
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