Playstation SCPH-1001 undoing PAL-M transcoding

Friends,

I finally got my hands on one of those early SCPH-1001 (PU-08) PS1 for cheap here in Brazil. Sadly my country, in the past, used a bizarre video system named PAL-M. Now I want to get back this console to NTSC.

The work to transcode it seems to be removing the original crytal oscillator and replacing with a PAL-M one.
Mine doesn't have a number on it but a few brazilian sites claim it is 14.302mhz. It uses 4 terminals.

So I removed it and got not picture.

Than I found some people saying that some pin on CXA needs to be grounded. Founded the grounded pin and removed the ground part.

No picture so far. Also the console hangs during boot (I can spot this because of the audio looping).

Than, I found that old PC motherboard have 14.318mhz crystals so I dessoldered one but it's a 2 terminal one.
And I have no idea where to solder it to get the image working again.

Does anyone know where to solder the new oscillator? Do I have the correct crystal with me?

 

You have the wrong oscillator for that model - the GPU clock needs to be 53.693MHz for a NTSC system, and uses a 4-terminal oscillator module.

As you have found, the console will hang without this oscillator, because with no GPU clock there are also no vertical sync interrupts.

<Deleted some stuff that was correct for the PU-18, but not for the SCPH-1001 you have>

There are a number of different variants of the PU-8 board, although they all use that same 53.693MHz oscillator. This is the most common one:

There is also an older PU-8 variant, with only space for a single oscillator, which is located where the empty pads are in this photo. In that case, pin 1 is at the lower left corner.

In NTSC mode, pin 7 of the CXA1645 should be high - for the PAL-M mod, it would have been pulled low, so just disconnect it and solder it back onto the original track.

 

Yeah, mine is exactly like this one





I removed the GND part of CXA.
The problem is where can I find this crystal oscillator to buy?

After digging a little more I've found the Genesis uses one of those. So, I would need to get a broken one, but even so, it would't be the 4 terminals one.
I have other PS1 here, all 5xxxx or higher.

For RGB does it matter the PAL-M crystal?

 

Don't foget that there exist 2 revisions of the PU-8 motherboard : http://assemblergames.com/l/threads/scph-100x-and-cd-player-swap-trick-bug.28251/

 

You might have some problems finding that oscillator - it used to be a reasonably common one, since it's 15 times the NTSC color subcarrier of 3.579545MHz, but the combination of the phase out of SD TV and the use of PLLs has meant that most things just use standard xtals and synthesize the required frequencies now. The other thing to note is that it's a 3.3V volt part, and most of the DIP style oscillators (like the one in the Megadrive) are 5V.

If you are using RGB, then the only effect of using that PAL-M clock crystal will be to introduce a very small error into the line and frame frequencies:

PAL-M: 3.5756110MHz
NTSC: 3.579545MHz
Ratio: 0.9989

About 0.1% slower, to be precise. I don't think you are likely to notice this.

The NTSC versions of the PU-7, PU-8 and PU-18 have this part (the PAL ones use a different 53.20MHz clock) - which is basically up to SCPH-550x and some early production SCPH-700x (most SCPH-700x are PU-20, which uses the new clock generation scheme, and doesn't have this oscillator).