PSX/PSone repairing

picked up a psone, it will spin but it doesn't read games. i put the 1001 laser assembly in and still no reading, just spinning.

i switched the top plastic of the assemblies but now the new assembly in the old psx doesn't spin.

i was trying to follow this:
http://i54.tinypic.com/zwke1y.jpg
http://i55.tinypic.com/2q2fp1c.jpg
http://dogbreath.de/PS1/LaserAlignment/Laser.html

 

The 100x series laser diodes does not work with a 10x series PSone if I recall from my tests.

 

Pretty sure thats wrong and it works fine.

 

Yes, but I am pretty sure it works just fine.

You just need to swap the top plastic. You can use all laser units in any playstation 1 AFAIK, but some ribbon cables may not reach easily and plastic might need changing.

 

Here you go:

http://www.youtube.com/watch?v=fqEwYwl2PFI

Someone doing exactly the same thing as the OP

Also, as I said above:

More confirmation:
http://www.neo-geo.com/forums/showt...g-out-on-me!&p=2537803&viewfull=1#post2537803

 

He is trying to put a laser deck from a 100x (PS / PS1) into a 10x (PSone).

I do not think that this is possible. Ribbon cable is also too short, so it will need extending.

The motor is spinning because the Focus / Tracking MCU (IC722) is on a separate driven line (CN701), whereas the optical device (CN702) goes though its own ribbon cable to the RF amp, CD Digital Sound Processor, Digital Servo and in this case, the SPU on a PSone is inside this single MCU (IC732). If the laser diode is different for each laser unit, then it simply will not work.


KSM-440BAM Laser Diode PSone - SCPH-102

 

That makes no sense anyway, as the 100x units were crap.

The issue would likely be the lack of gain/trim pots on the PSone board, the later units did it "on board" the laser unit and didnt need them - which might explain the not reading issue.

edit:

You are implying that units are not cross compatible, which is false. You can use 10x units in any other console just fine as well as 5xxx + in anything too.

 

He is trying to use a 100x laser deck, in a 10x.

Only SOME are cross-compatible. IE: non-major revisions. Going from a SCPH-1001 for example to a SCPH-102, is a huge revision difference. Who knows what Sony did to the laser diode circuitry.

 

give me an example of non major revisions you think are compatible and others you think are not compatible.

Because almost all work just fine. The issue I see with this I have already mentioned and you have ignored.

 

I'm with Bad_Ad84 here on every detail.

 

Why are you arguing? A KSM-440ACM/AAM (100x) laser diodes does not work in a KSM-440BAM (10x).

SCPH-5500 to SCPH-7500 is a small revision, where as SCPH-1001 to SCPH-102 is a huge revision. They complety changed the RAM, SPU, CD-DSP, CPU, BIOS etc...

End of story.

 

http://en.wikipedia.org/wiki/PlayStation_(console)

As I said, I suspect that is the issue.

If you are saying the 100x and 10x are totally incompatible due to circuity changes, why does the 10x laser work just fine on the 100x?

As I have said, it just sounds like the laser isnt (and cant be, due to lack of POTs) calibrated, rather than incompatible. The reverse works as they are compatible (as I have been saying) but calibration isnt required as its automatic.

You will probably find 100x units will work in 10x units in "luck of the draw", i.e. laser units that will work ok with what ever the 10x default values are.

 

i had the same problem swapped lasers and the disc spins and no reading/playing adjusted the pot on the laser tried lots of settings i set the lens pots at 86.6 on digital multi-meter works great even backups
so when i mod / repair ps1's i always set the lens the same on all model's

 

Also, changing the "RAM, SPU, CD-DSP, CPU, BIOS" makes little difference if the new unit is supplying the same data on the same pins. You can change parts of the laser unit (diode, what ever) long as the entire unit still outputs the same data.

 

The real reason video games were region locked? 50hz electrons don't work on 60hz TVs.

 

Scph-100x lasers work perfectly well in SCPH-10x (Slimline), we were using them when the psone was just released and getting slimline lasers where difficult and expensive, simply swapping the casing will allow it to function perfectly.

Two things to try before adjusting the pot:
1 Is the spindle loose and not getting jammed
2 Check the fuses on the board , cant remember wich it was but one stops the laser from getting power...

 

Go me.

This makes me sad that Haunted is in charge of the PSIO thing

 

He likes to make himself sound more intelligent, so comments on things that he really knows nothing about. But since it is all misinformation, it is of course useless. It is almost as if he posts for the sake of increasing his post count.

Edit:

This is also incorrect. The cable length is the same for both the KSM-440 AAM/ACM (SCPH-100x/3000 laser) and KSM-440 BAM (SCPH-10x laser). In fact that is why many considered the PSOne laser perfect for the original 100x models; every other model has a cable which is far too long, requiring you to tuck the cable in.

You only need a cable extension if you are putting the SCPH-100x/3000 or SCPH-10x laser in an SCPH-500x to SCPH-900x console. Every other kind of laser swap requires no such modification.

Why not just confirm this stuff before posting, or if you are unable to, simply refrain from posting?

 

I think its also a case of practice experience, vs speculation...

PS Bad AD,was there ever any doubt?