Sega Master System II - RCA Modification

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hamisht

274 posts

Ultimate Geek

Topic # 109178 14-Sep-2012 12:46
Hi all, I was going to throw out my Sega Master System II today, but remembered there is an RCA mod you can do to it, and though I would give it a go.. I've found a few guides, but they all use a drawing rather than photos.. ie; http://hackitup.tumblr.com/post/548848692/sms2videoaudiomods I find those type of guides hard to follow, as I don't know if that is the bottom of the board, or the top of the board.. Does anyone know of any guides like this one (different chip): http://www.youtube.com/watch?v=pJxBgH-zBVQ My chip is the Sony CXA1145P. Would be cool to try this out if its not too hard. My Blu-Ray Collection

539 posts

Ultimate Geek

Trusted

Reply # 685974 14-Sep-2012 12:53
That diagram should be all you need. The text says the chip is near the top of the board - should be close to the video output. The alignment of the chip (and hence the pin numbering) is determined by the notch on one side. Edit: Here's a picture of the PAL board - the chip is in hte middle, and the pins clearly labelled on the PCB: http://www.smspower.org/uploads/Development/PALMasterSystemIIICBDM4JrPAL-Component.jpg

539 posts

Ultimate Geek

Trusted

Reply # 685978 14-Sep-2012 13:04
This might be helpful: http://www.damomonster.com/Mod_Pages/SegaMasterSystem.html

274 posts

Ultimate Geek

Reply # 686050 14-Sep-2012 14:59
Thanks mate. That guide above looks very useful, I will have to check it out. I went out and bought 1x 75Ohm Resistor (but I didn't know what wattage to get lol) and 1x 220uF capacitor. Hoping to try it out today.. not sure what will 'blow' if i do it wrong.. either the whole Sega unit, or just the resister/capacitor. My Blu-Ray Collection

274 posts

Ultimate Geek

Reply # 686087 14-Sep-2012 16:46
Hey thanks again for that video guide, it was perfect! Just finished it now, and I didn't screw it up! just as well you posted that video too, because the guide I found had the audio output completely different! My local JayCar didn't have a white RCA port, so I had to use black. My Blu-Ray Collection

1965 posts

Uber Geek

Subscriber

Reply # 698432 9-Oct-2012 14:32
Very tidy job! I did a vaguely similar mod on an old Xbox to add an RCA digital audio output and it was a pig of a job. "You are" = "You're" - Not "Your". "They are" = "They're" - Not "Their" or "There". You probably mean "lose" not "loose". There's no such word as "Alot". On the internet, wasting time, since '89.

274 posts

Ultimate Geek

Reply # 698656 9-Oct-2012 19:23
I did the 50/60 Hz mod too: and the LED Powerlight mod: My Blu-Ray Collection