Problem with a Sony SCPH 1052 RGB Cable on a MX7000 TV

[metroid-soldier]

Hey guys I got a problem with my official sony grey RGB cable (scph 1052). It doesnt reconize a RGB signal only a composite signal . My grundig or lg tv doesnt have this problem with the scph 1052 RGB cable. So i aksed some people and they said me thats some wrong with pin 8 or 16 on my cable. I got an example ,when I power my n64 or gamecube (both RGB )the mx7000 turns on ,but on the ps2 not. My mx7000 powers automatically on when a RGB signal comes from a console and the wierd thing is I got only a RGB image with the scph 1052 cable when I disconect the scart cable from my mx7000 and put it again and then it reconize directly a RGB signal.This must I do every time when I power off the ps2.So I think the pin 16 doesnt have enough Volt to switch to RGB on my mx7000 after I disconnect the RGB cable and put it again on my mx7000. Does somebody know here how many volt pin 8 and 16 has on the scph 1052 cable ?

I

[rama]

The official Sony RGB cable for PAL regions has a voltage boost circuit that is supposed to generate the 12V required for automatic RGB switching.
It uses the 5V rail that's available on a PSX multi out for that.
When I got mine, this also never worked. In my case, the additional power draw tended to prevent the console from starting up properly.
I ended up removing the PCB with the boost converter and just switching my TV manually.

[Lawfer]

Have you tried with a SCPH-10142 RGB Cable?

[metroid-soldier]

The official Sony RGB cable for PAL regions has a voltage boost circuit that is supposed to generate the 12V required for automatic RGB switching.
It uses the 5V rail that's available on a PSX multi out for that.
When I got mine, this also never worked. In my case, the additional power draw tended to prevent the console from starting up properly.
I ended up removing the PCB with the boost converter and just switching my TV manually.

Thank you for your awnser ,so does it mean that every scph 1052 cable has this problem ?I thought I should try to buy another scph 1052 cable because I thought that only my scph 1052 cable maybe have this problem.

[metroid-soldier]

Have you tried with a SCPH-10142 RGB Cable?

Unfortunately no but I would very like to buy the scph 10142 cable to testing but they are so rar I cant find one. Doesnt have the 10142 cable this problem like the 10142 cable?

[rama]

I think the idea with the voltage boost board is pretty bad to begin with.
You never know if the receiving end puts any load on the 12V line and if it does, it will strain the limited 5V rail.
Changing the cable probably won't help. I'd get rid of the converter board.
The rest of the cable is great quality though.

[Syntax]

Using a buck/ step up converter for the 12v line is fine, it's drawing stuff all current. Tim Worthington (and I'm sure others too) stocks a scart head with a 12v buck/step-up that works a treat on my BnO

[rama]

An argument from authority?
The specific boost converter Sony used, together with my cabling and TV very reliably made my consoles not boot.
They would work when waiting for a while, then hitting reset.

As I said, if there's any current draw on those generated 12V, it will be bad for the limited 5V supply rail.
Maybe Tim protects his boards better than Sony did theirs?

[metroid-soldier]

So does it mean that every scph 1052 cable has that problem without modicafition(when its connected with a ps2)? So does this problem even exist if its to a ps1 connected? because I think the ps2 has different V on the multi out than the ps1 so that it hasnt enough V on pin 16 or pin 8 to power on the mx7000 and send a RGB singal.

[rama]

Your TV probably draws some current from the 12V pin and it shouldn't do that.
Some consoles will be fine, some will have issues.
Considering the 12V upconverter in the cable is a crutch to begin with, it's no surprise that it doesn't work reliably.

Does the TV absolutely require the 12V to be present?
Most can be manually switched to RGB.