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Re: PlayStation PAL Series Colour/Color Modification (PAL60)

Posted: June 26th, 2018, 5:28 pm
by LameGuy64
I was able to mod a 7000 and 7501 PlayStation to display correct colors in PAL mode without having to do an oscillator mod. You basically do the same mod shown in the first post of this thread but instead of connecting the indicated via to ground you connect it to 3.5v which you can find a pad of near the power connector on the mainboard.

This will make the console produce a weird NTSC50 signal when running in PAL mode which multi-standard CRT TVs can accept without issue but LCD TVs and video capture cards tend to not like very much so modding a PAL unit to output NTSC as PAL60 is better in the long run as PAL60 is supported better.

Re: PlayStation PAL Series Colour/Color Modification (PAL60)

Posted: October 24th, 2018, 8:42 pm
by Stepik
Hi! I found a right scheme for color mod scph-1002
https://shema.info/en/television-and-vi ... blems.html
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VT1 = BC547B

Re: PlayStation PAL Series Colour/Color Modification (PAL60)

Posted: April 16th, 2019, 11:24 pm
by Nextria
Shadow wrote:
July 31st, 2014, 7:56 pm
Image

You don't have to use a crystal oscillator if you know how to build a simple XTAL based oscillator, but a sealed oscillator will always provide a much more accurate running clock :)

The 'QXO-1100' must be 5V TTL or CMOS. The frequency you need is 4.433MHz as mentioned in the first post :P
Hello

I know this is a older theath but i have been modding some old PSX with the PSNee modchip.
I have the problem now the older models give black an white picture with ntsc games.

Are there any alternatives for the QXO-1100, on a site like aliexpess that you know ?
I want to sell the modded PSX, so i want a permanate fix

Re: PlayStation PAL Series Colour/Color Modification (PAL60)

Posted: April 17th, 2019, 2:02 am
by rama3
Well, as I warned in the other thread:
This mod will give you color, but it will look very bad. Moving dot crawl all over the screen bad.
If you want to sell the console, it's better to just include an RGB cable.

As far as I know, these mods aren't being made anymore. You'd have to build it yourself, possibly using a guide for a different console (same principle of supplying an external NTSC color carrier clock).
Here is a guide for Mega Drive, for example: https://assemblergames.com/threads/mod- ... tal.49686/

But honestly, it's not worth the trouble with a simple mod like this.
A better mod would somehow synchronize the carrier clock with the system, or simply replace the PAL main oscillator with an NTSC one.

Re: PlayStation PAL Series Colour/Color Modification (PAL60)

Posted: April 17th, 2019, 3:51 am
by Nextria
rama3 wrote:
April 17th, 2019, 2:02 am
Well, as I warned in the other thread:
This mod will give you color, but it will look very bad. Moving dot crawl all over the screen bad.
If you want to sell the console, it's better to just include an RGB cable.

As far as I know, these mods aren't being made anymore. You'd have to build it yourself, possibly using a guide for a different console (same principle of supplying an external NTSC color carrier clock).
Here is a guide for Mega Drive, for example: https://assemblergames.com/threads/mod- ... tal.49686/

But honestly, it's not worth the trouble with a simple mod like this.
A better mod would somehow synchronize the carrier clock with the system, or simply replace the PAL main oscillator with an NTSC one.
Hey Rama3

Yeah you right. I just ordered some RGB scart cables from AliExpress
But they still give black and white image.

How do I know I order the right cables or can I modify the ones I got ?

Re: PlayStation PAL Series Colour/Color Modification (PAL60)

Posted: April 18th, 2019, 1:39 am
by rama3
Is the picture also noisy and unsharp?
If so, the TV probably expects a signal that the cable doesn't provide (RGB switch signal).
This is rare, even with cheap cables, so idk.

Re: PlayStation PAL Series Colour/Color Modification (PAL60)

Posted: May 29th, 2019, 8:25 am
by alimadhi
I have 7500 NTSC-J
today arrived PSIO and every thing ok only PAL Games showing with no color!
any help?

Re: PlayStation PAL Series Colour/Color Modification (PAL60)

Posted: May 29th, 2019, 2:33 pm
by Shadow
Lift pin 157 on the GPU and tie the pad as seen in the 7502 photo high to Vcc (3.50V) instead of Gnd (0V).

Re: PlayStation PAL Series Colour/Color Modification (PAL60)

Posted: May 29th, 2019, 10:30 pm
by alimadhi
Shadow wrote:
May 29th, 2019, 2:33 pm
Lift pin 157 on the GPU and tie the pad as seen in the 7502 photo high to Vcc (3.50V) instead of Gnd (0V).
hmmm, i have tie the pad to GND and give me only sound, will try to to vcc 3.50V
thanks

Re: PlayStation PAL Series Colour/Color Modification (PAL60)

Posted: May 30th, 2019, 2:21 am
by Shadow
GND is for PAL consoles.
VCC is for NTSC consoles.

Re: PlayStation PAL Series Colour/Color Modification (PAL60)

Posted: May 8th, 2020, 12:03 am
by bugmenot
Hi there !

For the SCPH-7502, there seems to be an alternative way of doing this :

Image
Source : https://github.com/Kippykip/PSX-Modchip ... native.jpg

EDIT : After checking the traces on my PU-22, it seems fine for a PAL SCPH-7502.
Here is the other side of the board with the contact points circled :
Image