Generic Power Supply

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Squaresoft74
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Generic Power Supply

Post by Squaresoft74 » September 7th, 2018, 11:35 pm

Hello,

Has anyone ever used one of these PSU clone ?
Image.

They were made by "Madcow" and PCB is dated "Jun:03.1999".
They can fit into any FAT PS1 since they have both 7 and 5 pins connectors available, which is nice.

But are they at least safe to use at all ?
Last edited by Squaresoft74 on September 8th, 2018, 1:07 am, edited 1 time in total.

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Shadow
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Re: Generic Power Supply

Post by Shadow » September 8th, 2018, 12:35 am

Nope, never tried it, but it looks well designed and it looks like it should be safe.
Development Console: SCPH-5502 with 8MB RAM, MM3 Modchip, PAL 60 Colour Modification (for NTSC), DB-9 breakout headers for both RGB and Serial output and an Xplorer with CAETLA 0.34.

Development Computer: Windows 98, Pentium 3 [400MHz], 128MB SDRAM, DTL-H2000, DTL-H201A, 21" Sony Trinitron CRT, CD-ROM burner, 3.25" and 5.25" Floppy Diskette Drives and a ZIP 100 Diskette Drive.

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Re: Generic Power Supply

Post by Squaresoft74 » September 8th, 2018, 1:05 am

Looks good then.
Only flaw i can see right now is the 220-110v connector that only holds with the 2 solder points.
I'll replace it with an original connector since it also holds with 2 screws.

I'll test it for a while and see if that doesn't warm up too much.

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Re: Generic Power Supply

Post by rama3 » September 8th, 2018, 8:36 pm

Hm, I've got to disagree on the looks of this supply. To me, it looks like a cost reduced clone of the original.

I can't say much about the primary side, but look at the secondary!
Where is the reset controller IC and all the filtering passives?
The capacitors look small, and all I can read on one of them is "vent" :p

These probably work, but they're not quality.

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Re: Generic Power Supply

Post by Squaresoft74 » September 8th, 2018, 9:12 pm

Would it be safer to mod an original one like this ?

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Re: Generic Power Supply

Post by rama3 » September 9th, 2018, 3:43 am

Since this involves mains power, I really don't want to recommend it.
Originals are okay within their specifications.
You probably want to power an early machine, and those use a bit more juice.
It will certainly work, but maybe a component will be stressed more than it should be (unlikely, but still).

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Re: Generic Power Supply

Post by Squaresoft74 » September 9th, 2018, 3:53 am

So in the end, what would be the best solution to replace a Scph-100X's power supply with one that doesn't warm up as much as their original one ?

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Re: Generic Power Supply

Post by Shadow » September 9th, 2018, 4:57 pm

rama3 wrote:
September 8th, 2018, 8:36 pm
Hm, I've got to disagree on the looks of this supply. To me, it looks like a cost reduced clone of the original.

I can't say much about the primary side, but look at the secondary!
Where is the reset controller IC and all the filtering passives?
The capacitors look small, and all I can read on one of them is "vent" :p

These probably work, but they're not quality.
Compared to wall adaptors you get these days from China, I thought it was pretty decent. Still, it's not going to be nearly as reliable as the genuine Sony ones.

Squaresoft74 wrote:
September 9th, 2018, 3:53 am
So in the end, what would be the best solution to replace a Scph-100X's power supply with one that doesn't warm up as much as their original one ?
If you're skilled enough, you could tweak the existing Sony design or build your own from scratch.
Development Console: SCPH-5502 with 8MB RAM, MM3 Modchip, PAL 60 Colour Modification (for NTSC), DB-9 breakout headers for both RGB and Serial output and an Xplorer with CAETLA 0.34.

Development Computer: Windows 98, Pentium 3 [400MHz], 128MB SDRAM, DTL-H2000, DTL-H201A, 21" Sony Trinitron CRT, CD-ROM burner, 3.25" and 5.25" Floppy Diskette Drives and a ZIP 100 Diskette Drive.

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Re: Generic Power Supply

Post by rama3 » September 9th, 2018, 11:25 pm

Also, the 100x design was produced for quite a while. Later models use power supplies from Nichicon, with similar performance to their 700x / 900x versions. So if you can find one of those, this is the best replacement.

I suppose your second best option is indeed a conversion of a regular 700x / 900x to 7 pin.
Keep the mains power in mind!

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Re: Generic Power Supply

Post by Squaresoft74 » September 18th, 2018, 7:55 am

Shadow wrote:
September 9th, 2018, 4:57 pm
If you're skilled enough, you could tweak the existing Sony design or build your own from scratch.
Not an option for me i'm affraid. :shrug
rama3 wrote:
September 9th, 2018, 11:25 pm
Also, the 100x design was produced for quite a while. Later models use power supplies from Nichicon, with similar performance to their 700x / 900x versions. So if you can find one of those, this is the best replacement.
You mean like the second one on the bottom:
Image
rama3 wrote:
September 9th, 2018, 11:25 pm
I suppose your second best option is indeed a conversion of a regular 700x / 900x to 7 pin.
Keep the mains power in mind!
Thanks to both of you for your advices. :)

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Re: Generic Power Supply

Post by rama3 » September 19th, 2018, 2:02 am

Yep, that's one.
You can see how they're better by the heat marks around the input switcher (ie: none on the Nichicon ;p).

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