Mayumi v2.1 chip install (16F84-04/P) - PS1 SCPH-1001

Just got back form my trip and I tried soldering the BIOS chip, unfortunately it doesn't work, the PS only shows a black screen (though the CD reader still reads CDs but nothing happens). Here's 3 pics, showing both sides of the chip and the third one showing how the original BIOS chip was soldered. Please tell me if I soldered it properly.



Also firehaza, depending on how damaged the CD Reader in your PS is, you could try lubing the lens' gears and adjusting the drive (http://dogbreath.de/PS1/LaserAlignment/Laser.html). The CD Reader in My SCPH-1000 read original dics perfectly but had slight issues reading music in backups, and now works perfectly after doing these 2 things.

 

OK, you need to pull up pins 43 and 44 - just get a piece of wire, and solder one end to pin 23 and the other to both pins 43 and 44.

Apart from that, everything looks good.

 

Awesome, it works! Thanks a lot TriMesh

However, just as you said earlier, I don't get the PS logo when booting a foreign disc. Is there a way to get this logo? If I need to use a US or PAL BIOS, then never mind because since it's a Japanese PS I want to have the menu in Japanese.

Edit - Looking back at the older posts, it seems that it would be too complicated to do that unless someone released a custom BIOS that would show the logo with foreign discs, so I will just stick to the chip I just soldered.

 

Since you want a Japanese menu, there is not a lot you can do - that seems to be the only Japanese BIOS revision that will boot non Japanese discs at all. I guess it might be possible to patch out the check, but finding in it half a meg of ROM code might take a while...

 

Good stuff, may get a small stock of these in

 

YOU CAN DO IT! For the glory of the PS1 bootup animation!

Lemmie know when, I'm still keen on modchipping mine

 

I got one of these installed, but am having some problems with it. Was wondering if any of you guys could help out. It won't run backups well at all. Some it won't even load, and others it tends to hiccup on the music. It also does this on some of my official discs. Like the sound goes in and out, especially when it first starts a track.

Any ideas?

 

It may be your laser going out.

 

That seems a bit odd, as I bought the system basically new(it still had the tape holding the lid shut).

 

You bought it new 20 years ago or you bought a new one recently that no one had used? Is it the SCPH-1001 which is the first model that came out in 1994? Their lasers are supposed to be not as good as some of the newer models. If it is a new laser then I dont know. I was having an issue with my psone (SCPH-101) where it would stall on the Playstation loading screen on some games and a new laser fixed it.

 

I bought it recently, that no one had used.

It is the SCPH-1001. It could be the laser. I just thought maybe it was the chip, as I can boot all retail games, but can't really boot almost any backups, without issues. But it's where it has sound issues with retail games that is particularly annoying me.

I do have some backup lasers, but I'd like to make sure what it is first.

 

pretty easy to swap the laser assembly on those to test. I guess it could be the chip, but if it was me, I would just swap the laser to test and go from there if it was still doing it.

 

I'll have to ask my modder about it, since he's the one who would be doing it.

 

you just take the screws out of the bottom of the case to separate it and then there are 2 cables attached to the laser assembly. its super easy. you should not need someone to do if for you.

 

I feel pretty uncomfortable doing it myself. I will let him try, and I'll send him the laser.

Does this sound more like a laser issue than a chip error? It just seems kind of weird. Never had any problems like this with modded or unmodded systems. But I've never had a laser die out either.

 

Sounds like it to me. Maybe someone with more knowledge will reply at some point. But if you aren't going to try to fix it yourself, you should probably just send it to your modder and let them figure it out.

 

I feel pretty uncomfortable doing it myself. I will let him try, and I'll send him the laser.

Does this sound more like a laser issue than a chip error? It just seems kind of weird. Never had any problems like this with modded or unmodded systems. But I've never had a laser die out either.

 

I'm pretty sure your problem comes from the laser. Burned CDs are harder to read, which means that a weak laser will have more trouble reading those than regular CDs, which is exactly your problem. Actually, I had almost the same issue with my SCPH-1000 (that was also new) where it ran originals with no problems but had trouble reading burned CD's music (so my laser was a little stronger that yours but not by much). I managed to make it read burned discs better by following this guide, but it still skipped a little bit of the music in some games. I then resolved myself to replace the CD reader assembly with one from a PSone like described in this other guide. After replacing and retuning the assembly following the first guide, it now works flawlessly.

You could also buy a PSone CD assembly from China, and I tried to do it myself, but the replacements that I got actually didn't work well with the SCPH-1000 (but worked on the actual PSone). So if you don't want to sacrifice a PSone for that, you could either buy one that doesn't power on (but then you wouldn't be sure that the CD reader works), or buy a working one, take the CD reader for the SCPH-1001, and buy a replacement from China for the PSone.

 

Hmm...I have replacement lasers now, that I got a while back. However, I don't know if they'll work with this model. Is there a particular type I should look for?

 

Well, there are 2 "main" parts in the assembly: the lens itself and the rest. If the assembly fits in the SCPH-1001 and you can plug the white plug, then the "rest of the assembly" should be compatible with the console. As for the lens (the part connected to the long orange plug), I can only confirm that the original, KSM-440something (can't remember exactly) and the PSone, KSM-440BAM work. Others may work but I haven't tried. The model name is written below the lens, like in this picture.