PlayStation 2 RGB scart pin 8 fed with 9V for 4:3 ratio

Discussion in 'General Gaming' started by helakustorm, Dec 10, 2016.

  1. helakustorm

    helakustorm Robust Member

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    I need this because my CRT Sony Triniton change the ration to 16:9 when I connect the console through RGB because pin 8 it's fed only with +5V according to this diagram: http://members.optusnet.com.au/eviltim/gamescart/psx.png
    On SCART standards +5–8 V means status ON (change automatically to rgb source) and aspect ratio 16:9 and +9.5–12 V means status ON and aspect ratio 4:3.
    Unfortunately cannot set the TV to "always 4:3" because that option doesn't exist on the select menu or service menu.
    So, is there a possibility to fed pin 8 with 9V and not to change manually the ratio every time when I connect my PS1/2 to the TV?

    Thanks!
     
    Last edited: Dec 11, 2016
  2. MattyHusted

    MattyHusted Rising Member

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    which model Triniton is it on mine there is a option in the service menu to turn 16x9 off
     
  3. helakustorm

    helakustorm Robust Member

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  4. rama

    rama Gutsy Member

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    One way to do this is soldering a 9V battery holder onto the scart plug. Pretty ghetto but it does work ;p
     
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  5. helakustorm

    helakustorm Robust Member

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    According to this diagram http://members.optusnet.com.au/eviltim/gamescart/psx.png the console provides a +5V DC on pin 10.
    Soldering a 9V DC battery on pin 10 then the output will be 19V... which according to SCART standards is too high; +9.5–12 V → on/4:3 is normal.
    But it's a good idea :D

    Thanks!
     
  6. rama

    rama Gutsy Member

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    You only connect the battery to the pin (and ground). I thought that much was a given :p
     
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  7. helakustorm

    helakustorm Robust Member

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    I will test it with a +5V DC battery.
    For the moment I will need to replace the caps inside the SCART because they have lower values than 220uF (recommended) and I think the image is a little too dark.
    I think the caps have 180uF values.

    UPDATE: wow... they have 100uF 10V ...
     
    Last edited: Dec 15, 2016
  8. Bad_Ad84

    Bad_Ad84 The Tick

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  9. helakustorm

    helakustorm Robust Member

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    By the way 100uF 10V caps in R G B lines are a bad choice, correct?

    Thank you Bad_Ad86.
     
  10. rama

    rama Gutsy Member

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    @Bad_Ad84 nice suggestion but it could be a problem. When I got an original PSX RGB cable by chance, I noticed a lot of my PSX suddenly developed startup issues.
    It turned out that the initial power draw of the booster Sony used in their design was a little too much for the console!
    Maybe it's just my cable and surely newer designs are better, but I wouldn't rule out this happening again.
    Sure, you can just tap reset once after it fails to start but it seems ..unsafe.
    I removed the circuit from my cable since I don't need it ;p

    @helakustorm Yes, 100uF is too little. It will work but cause slight image degradation. It's also a sign of a cheap cable so expect other issues as well.
     
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  11. helakustorm

    helakustorm Robust Member

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    Unfortunately that's true rama...
    I have some artifacts going through the image...
     
  12. rama

    rama Gutsy Member

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    https://www.retrogamingcables.co.uk...on-1-2-ps1-ps2-rgb-scart-cable-lead-rca-sound
    A cable like this will give you comparable results to the official, high quality cable.
    Of course you still have the 12V switching problem then. I'd continue looking for a workaround on your TV and get that cable.

    Edit:
    If it's not in stock or too far for shipping, look around for RGB cable supplier suggestions on forums. There are a few vendors on Ebay that make good quality cables in the same price range.
     
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  13. helakustorm

    helakustorm Robust Member

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    Thank you rama for helping me.
    It's not a big problem because I can change the aspect ration on my remote control but I need to do this everytime I turn on the TV.. it's a little annoying.

    Pardon my question rama but why did you choose that specific cable with separated audio/RCA? It's better for interferences on the audio part to have the video and audio split?
     
  14. rama

    rama Gutsy Member

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    Well, there will probably come a time when you want to connect to different audio equipment. Maybe over at a friends or when you get / decide to use an external amplifier. This option is a cheap upgrade to prepare for that event :)

    Oh, and there's no need to thank me.
    I just like to share what I learned. No need for others to spend money on the wrong items as I did :p
     
  15. Bad_Ad84

    Bad_Ad84 The Tick

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    I have an original PS1 RGB cable and have no such issues. Its the cable I use for all PS1/2 consoles that hit my workbench.

    Regarding that booster, the consumption is very low. Maybe I will measure it when I get time/chance
     
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  16. helakustorm

    helakustorm Robust Member

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    Oh, I understand rama.
    My question was because I was reading some articles on the internet about good RGB cables and they recommended to have split audio and video sources and they only be joined in the SCART.
    But my logic tells me if they are shielded I don't think that there is a problem.
     
  17. rama

    rama Gutsy Member

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    That would be nice if you captured the initial power draw. It is the gray cable with the pcb in the SCART plug, right?
     
  18. rama

    rama Gutsy Member

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    That tip is valid but if the shielding is correct, you can pass audio near the video lines as well.
    But if you were to build a cable yourself, and don't have the best stuff to use, then routing audio away from the video will help a little.
     
  19. Bad_Ad84

    Bad_Ad84 The Tick

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    correct
     
  20. rama

    rama Gutsy Member

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    The one that also somehow doesn't have capacitors on the RGB lines, correct?
    I nearly forgot about that. I mean, the cable did work and I didn't seem to have issues but every documentation on the consoles or the video encoders / buffers tells us they're required :p
     
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