Rare Hardware: Who can find a costdown PSone console?

Members research, findings and information that can be useful towards the PlayStation 1.
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nocash
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Rare Hardware: Who can find a costdown PSone console?

Post by nocash » April 29th, 2016, 4:25 am

Time for making a Research thread on this: Who can find a costdown PSone console? That is, a PSone with "PM-41(2)" mainboard. I've asked around for a while, but that specific PSone models seem to be very hard to find. Either because they are incredible rare, or just because their owners can distinguish them from normal PSone's (with "PM-41" mainboard).

The costdown PSone models are known to exist because there are a few low-resolution photos of their mainboards in the internet (mostly photo-snippets with mod-chip wiring info). There are also schematics for that models in the PSone service manual. But apart from that, there's pretty much nothing known about those models.

The thing that I am particularily interested in would be the cdrom firmware of that boards (it's a different firmware revision as in normal PSones, according to the service manual). But for now, I would be glad if anybody could find that mysterious console at all.

For doing so, you would need to open the case, and check if mainboard is marked "PM-41" (old version) or "PM-41(2)" (rare costdown version). If you find one of that rare models, photos of the sticker at the bottom of the console would be nice, and also info when/where you've purchased the console (maybe it was sold only in certain countries). That might help other people to figure out how/where to find that console model.

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Re: Rare Hardware: Who can find a costdown PSone console?

Post by Squaresoft74 » April 29th, 2016, 7:37 am

I guess you mean this one ?
Image Image Image

I just picked it up today, was offered to me for parts :D
I'm in France btw so this model is at least available here.
Last edited by Squaresoft74 on May 1st, 2016, 2:41 am, edited 1 time in total.

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Re: Rare Hardware: Who can find a costdown PSone console?

Post by Shadow » April 29th, 2016, 4:17 pm

I wonder why they crossed out the "(2)" after the PM-41 though. There would have to be a reason why.
It could be because it's using the "PM-41 (2)" board layout/hardware, but a standard "PM-41" BIOS :shrug
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Re: Rare Hardware: Who can find a costdown PSone console?

Post by nocash » April 29th, 2016, 11:18 pm

Squaresoft74 wrote:I guess you mean this one ?
Image Image
I just picked it up today, was offered to me for parts :D
I'm in France btw so this model is at least available here.
Whoops, yes. I didn't think that it would take only one day until somebody would find it.

The Sticker with the "PSone, MODEL.NO. SCPH-102, PAL, 3-072-299-11, N1158" looks exactly same as on my PSone (with PM-41 board), so that sticker could either mean PM-41 or PM-41(2).
There are also PSone's with different stickers ("3-062-649-11" does probably hint on a PM-41 board, and "SCPH-102C" might hint on a PM-41(2) board).

The Serial/Barcode numbers (also on the sticker) seem to be different for all consoles. My PSone is marked "C5335259, S01-5335259-I" and yours has "C5592787, S01-5592787-T", so maybe "559nnnnn" and up hints on PM-41(2). But I've also spotted photos that seem to show PM-41 and PM-41(2) consoles with "2nnnnnn" numbers.

The Case looks exactly same on all PSones (except, some very late models seem to have small feet, which should hint on "PM-41(2)"). However, the Mainboard looks smaller in costdown models. PM-41 does cover at least half of the square ventilation holes (on the left/right sides), whilst PM-41(2) doesn't cover that holes, which might be visible even without opening the case... unless the shielding plates are covering the ventilation holes. Can you make photos with top/bottom shielding plates installed?

Btw. here are some other interesting PSone photos... The last image does also have the "(2)" crossed out, but I guess that's just some "quality test passed" marking (unless Sony has crossed out the "(2)" to make it more difficult to find "PM-41(2)" boards).

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Re: Rare Hardware: Who can find a costdown PSone console?

Post by Squaresoft74 » April 30th, 2016, 2:27 am

nocash wrote: The Case looks exactly same on all PSones (except, some very late models seem to have small feet, which should hint on "PM-41(2)"). However, the Mainboard looks smaller in costdown models. PM-41 does cover at least half of the square ventilation holes (on the left/right sides), whilst PM-41(2) doesn't cover that holes, which might be visible even without opening the case... unless the shielding plates are covering the ventilation holes. Can you make photos with top/bottom shielding plates installed?
Here you go:
One PM-41(2), three PM-41
Image

Closer PM-41
Image

Closer PM-41(2)
Image

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Re: Rare Hardware: Who can find a costdown PSone console?

Post by Squaresoft74 » May 25th, 2016, 1:48 am

Hi nocash.
I got my hands on another one P-161125S-41-71
Image Image
The previous one i sent you is P-161125S-31-71

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