I decided to recap this power supply before using my second 3D printer
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Creality 3 printer switching power supply recapped
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Creality 3 printer switching power supply recapped
9 PC LCD Monitor
6 LCD Flat Screen TV
30 Desk Top Switching Power Supply
10 Battery Charger Switching Power Supply for Power Tool
6 18v Lithium Battery Power Boards for Tool Battery Packs
1 XBox 360 Switching Power Supply and M Board
25 Servo Drives 220/460 3 Phase
6 De-soldering Station Switching Power Supply 1 Power Supply
1 Dell Mother Board
15 Computer Power Supply
1 HP Printer Supply & Control Board * lighting finished it *
These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10%
1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later )
2 Hem Saw Computer Stack Board
All of these had CAPs POOF
All of the mosfet that are taken out by bad capsTags: None
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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.9 PC LCD Monitor
6 LCD Flat Screen TV
30 Desk Top Switching Power Supply
10 Battery Charger Switching Power Supply for Power Tool
6 18v Lithium Battery Power Boards for Tool Battery Packs
1 XBox 360 Switching Power Supply and M Board
25 Servo Drives 220/460 3 Phase
6 De-soldering Station Switching Power Supply 1 Power Supply
1 Dell Mother Board
15 Computer Power Supply
1 HP Printer Supply & Control Board * lighting finished it *
These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10%
1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later )
2 Hem Saw Computer Stack Board
All of these had CAPs POOF
All of the mosfet that are taken out by bad caps
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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 reasonableLast edited by sam_sam_sam; 11-19-2020, 08:33 AM.9 PC LCD Monitor
6 LCD Flat Screen TV
30 Desk Top Switching Power Supply
10 Battery Charger Switching Power Supply for Power Tool
6 18v Lithium Battery Power Boards for Tool Battery Packs
1 XBox 360 Switching Power Supply and M Board
25 Servo Drives 220/460 3 Phase
6 De-soldering Station Switching Power Supply 1 Power Supply
1 Dell Mother Board
15 Computer Power Supply
1 HP Printer Supply & Control Board * lighting finished it *
These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10%
1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later )
2 Hem Saw Computer Stack Board
All of these had CAPs POOF
All of the mosfet that are taken out by bad caps
Comment
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Re: Creality 3 printer switching power supply recapped
Originally posted by stj View Postthat's a nice oldskool design, even a fiberglass board!
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.
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