I decided to recap this power supply before using my second 3D printer
Attached Files
-
-
Re: Creality 3 printer switching power supply recapped
that's a nice oldskool design, even a fiberglass board! -
Re: Creality 3 printer switching power supply recapped
I am glad you comment about the quality of this switching power supply
The only complaint I have about this board is that 3 output caps mounting holes are little bit off in the hole size couple of were a little bit over sizedLast edited by sam_sam_sam; 11-17-2020, 05:14 PM.Comment
-
Re: Creality 3 printer switching power supply recapped
Update
Ran power supply on the filament heater ( about 2 amp draw ) for over 24 hours every when well
I also modified the switching power supply and added a power supply jack for the filament heater and relocated the indicator LED to the incoming power supply housing where I can this light
One note I have to modify the Ender 3D bed heater controller output because once it gets to temperature it cycles way to fast and plays hell with my battery backup for my computer and 3D printer this heater draws a lot of current when on I go to add a PWM controller to the bed heater and back down the current until the temperature cycle is more reasonableAttached FilesLast edited by sam_sam_sam; 11-19-2020, 08:33 AM.Comment
-
-
Re: Creality 3 printer switching power supply recapped
It is.
Classic H-bridge with KA7500. Pretty reliable when designed right.
I wouldn't trust the label worth a damn, though.
15 Amps at 24V? That's 360 Watts. Even at a super-optimistic 85% efficiency (which I doubt this Chinese thing will ever do), the PSU should be drawing over 420 Watts from the wall. So those heatsinks and the transformer will need to be dissipating around 60 Watts total at that power. Do you see it happening? I don't, and even less without a fan. 6-7 Amps is probably a more realistic continuous rating.
The lack of real safety marks also doesn't inspire any confidence either.Comment
-
Vizio e601i-A3 - Has Sound and Display, But No Backlight - Bad Power Supply Board or Bad LED Bulbs ?I was given this TV from my great uncle. He said it just wouldn't turn on one day out of nowhere, replaced the TV, and gave it to me to possibly fix and use for myself.
Upon bringing it home and plugging it up, it showed a standby light.
I powered it on and without a flashlight, the display showed the "V" but the lighting is very dim, but visible.
The screen seems to blackout and stay black, but with a flashlight I can see the display.
With my Playstation 4 connected via HDMI, and running a game I can hear sound.
Assuming... -
I have been working on this concept for quite some time now with limited success but recently I found a switching power supply that is setup for the voltage that this soldering station needs to operate at however it also needs part of the secondary circuit from the original switching power because you need several voltage rails
I once tried to get a ZD-915 desoldering station to work on a 18 volt battery power supply but unfortunately things did not go well but I did find a work around but I might try this idea again but going at a little differently more about this another time... -
These cheap non brand capacitors at it again
Last night we had a power outage [ long drawn out trying three to come back up before going out completely ] and when I went to turn the DVR camera recorder back today no go 3 bad capacitors ( one capacitor no ESR reading on DVR board the other 3 capacitor on the power supply board over 40 ohm this is not a misprint ) on the external switching power supply and one capacitor on the DVR camera recorder board where the power supply that goes to the hard drive disk is
Well at least I have the cameras back on line I to try the... -
I did not have any 27uf @ 50 volt capacitors but one nice thing is that it has enough room for two capacitors in parallel a 22uf and a 4.7uf @ 50 volts 22 plus 4.7 equals 26.7uf which so very close to 27uf I will show some pictures of it sometime tomorrow
This is one of the shit est boards I seen in a very long time and it was the daughter board the traces just lifting off the board I had to use the capacitor leads to repair the the traces and the main board is not any better because I had to repair several traces for the daughter board to the main board
After all of... -
I have wanting to do this project for quite sometime now and I finally found a switching power supply that will work on this desoldering gun station ZD-915 that the original switching power supply took a shit and just was not worth trying to fix it because this switching power is not quite big enough to handle the heater element and the vacuum pump
One note when I tested the switching power supply and the voltage control board I noticed that this desoldering gun heat up much faster than the original switching power supply which I was really surprised by to the point that I might buy...
Comment