[Hardware Mod] NTSC/PAL reference oscillator mod for PU-18

[*ka]

I made the modification on an NTSC console, model SCPH 1001. I added PAL crystal oscillator, 221 ohm resistor and rfc. On the back of the board I removed a component that connected the PAL signal to ground.




[youtube][/youtube]

[L10N37]

There is a mistake on this, the RF choke and resistor are the wrong way around on the "parts to install" picture for top of PU8, you want RF choke on the power pin and the resistor on the clock out.

[*ka]

There is a mistake on this, the RF choke and resistor are the wrong way around on the "parts to install" picture for top of PU8, you want RF choke on the power pin and the resistor on the clock out.

Are you referring to the photo I posted?
I left the resistor and choke in the same position that Sony left in the European and American console.
So is it wrong?
Thanks.

Photo USA PU8


Europe PU8

[TriMesh]

If you have installed them as per the photos you posted, the install is correct - the component positions indicated in my original document are wrong.

[DBCPS1TOGO]

[titifayls]

Hy , how to do it on pu18 Pal please?

[MasterLink]

Hy , how to do it on pu18 Pal please?

The original post's PDF describes the differences between the PAL and NTSC machines. Therefore you have what you need to go forward with working on a PAL machine if you are converting it into an NTSC machine.

[Yagamisan]

Hi, is it possible to do this dual crystal mod on a early PU-8 mb?

[MasterLink]

Hi, is it possible to do this dual crystal mod on a early PU-8 mb?

Probably gonna depend on which revision of the PU-8. When you say early, are you referring to the 1994 GPU with dual ported VRAM, or does yours have SGRAM? I do believe this will alter some things.

[Yagamisan]

@Masterlink yeah its the mb with the old gpu with dual ported VRAM 160 pins.
As i mostly play US and JP games i have swap the pal crystal in my unit with a ntsc one taken from a junk JP board.

Its all good now with US & JP games but it 'll be nice to have the correct pal signal too, without the need to buy additional mod.

[MasterLink]

I'm honestly not sure. I have a DTL-H1001H with the same early GPU as yours, and honestly never tried this mod on it (I don't plan to mod this system personally), hopefully someone else has insights, I have service manuals for the later PU-18 and up, but nothing on anything earlier than that to really crosscheck myself.

[Yagamisan]

No worries thank you