mega drive black and white
mega drive black and white
dont know if i can ask this here ,but i have a pal megadrive that only playes in black and white no mods where dont to it
but i have a svideo box so far i tried panasonic plasma tv difrent settings ntsc pal secam auto etc all black and white picture is clear
all games are pal ! and i also tried a commodore monitor 1701/02 via chroma luma -svideo same thing picture is crystal clear but black and white
i orderd a svideo switch i saw a post here maybe it wil work for me
iam using this adapter
i dont know how to post pics of the internal componants
but see link https://item.taobao.com/item.htm?id=549 ... .N.35c5da2
https://www.youtube.com/watch?v=5GfcmhfbJxg&t=89s
update : i bought this selector works perfect but stil no color after changing consoles when they are on
i have color on n64 snes but not megadrive
https://www.ebay.com/itm/Audio-Visual-S ... 1251017163
i posted pics on this forum of the internal components https://gbatemp.net/threads/mega-drive- ... te.538505/
but i have a svideo box so far i tried panasonic plasma tv difrent settings ntsc pal secam auto etc all black and white picture is clear
all games are pal ! and i also tried a commodore monitor 1701/02 via chroma luma -svideo same thing picture is crystal clear but black and white
i orderd a svideo switch i saw a post here maybe it wil work for me
iam using this adapter
i dont know how to post pics of the internal componants
but see link https://item.taobao.com/item.htm?id=549 ... .N.35c5da2
https://www.youtube.com/watch?v=5GfcmhfbJxg&t=89s
update : i bought this selector works perfect but stil no color after changing consoles when they are on
i have color on n64 snes but not megadrive
https://www.ebay.com/itm/Audio-Visual-S ... 1251017163
i posted pics on this forum of the internal components https://gbatemp.net/threads/mega-drive- ... te.538505/
Last edited by scroeffie on Wed May 15, 2019 1:18 pm, edited 1 time in total.
Re: mega drive black and white
It's probably an issue with the colorburst frequency. I'm just assuming here as I don't know anything about the S-video converter you are using, but I think it only properly works for NTSC systems and not PAL systems (I see only 1 crystal oscillator in the device). If you send a PAL signal with NTSC colorburst frequency, the mismatch will cause the image to come out black and white.
Re: mega drive black and white
Makinx wrote:It's probably an issue with the colorburst frequency. I'm just assuming here as I don't know anything about the S-video converter you are using, but I think it only properly works for NTSC systems and not PAL systems (I see only 1 crystal oscillator in the device). If you send a PAL signal with NTSC colorburst frequency, the mismatch will cause the image to come out black and white.
so i need to change it to a Crystal Oscillator 4.433MHz PAL
Re: mega drive black and white
Yes, taking a closer look at your pictures, I see that the crystal is 3.79545Mhz, which is the NTSC frequency. Changing that to a PAL frequency crystal should work. The crystals are readily available online and are very cheap.
Re: mega drive black and white
man this makes so much sense now duhh ,and this adapter is from japan is a japan megadrive ntsc ?
i wil order one and change it asap thanks
i wil update if it works
if someone wants to order this adapter you need to do it via superbuy very easy !
i wil order one and change it asap thanks
i wil update if it works
if someone wants to order this adapter you need to do it via superbuy very easy !
Re: mega drive black and white
The Japanese Mega Drive is indeed 60hz NTSC, same as the Genesis in the USA/Canada.
The European and Australian Mega Drive are 50hz PAL. Your converter box was apparently not designed with those consoles in mind.
I hope replacing the crystal works! Keep us posted.
The European and Australian Mega Drive are 50hz PAL. Your converter box was apparently not designed with those consoles in mind.
I hope replacing the crystal works! Keep us posted.
Re: mega drive black and white
yes i wil tel you if it works or not
Re: mega drive black and white
It would be better to use an RGB Scart cable instead of changing the xtal. It will give full color without any issues.
Re: mega drive black and white
The commodore monitor he's using for chroma/luma doesn't have a scart input, but what I find odd is the 1702/01 monitors are supposed to support both NTSC and PAL interchangeably.
That's a neat rgb to s-vid conversion box, anyway.
That's a neat rgb to s-vid conversion box, anyway.
Re: mega drive black and white
true scart rgb is better but i dont want to i have 2 commodore monitors 1 for my c64 of course and the other for snes nes n64 and megadrive
Re: mega drive black and white
oke i changed the crystal but the crystal has a difrent shqpe does that matter
it says 4.433619 ,but the image is crystal clear but stil black and white
all my games are pal sound is working perfect
bought this one https://www.ebay.nl/itm/Quartz-Crystal- ... 3804529046
it says 4.433619 ,but the image is crystal clear but stil black and white
all my games are pal sound is working perfect
bought this one https://www.ebay.nl/itm/Quartz-Crystal- ... 3804529046
Last edited by scroeffie on Fri May 24, 2019 1:28 pm, edited 1 time in total.
Re: mega drive black and white
how did you fit a 2 leg crystal to a crystal oscillator 3 leg slot?
Re: mega drive black and white
the slot is not 3 legs you mean the pcb has 2 holes for the crystal not 3
Re: mega drive black and white
In addition to the 4.433MHz you should change the MB3516A mode to "PAL" - lift the leg #7 of the encoder so that it doesn't touch the pad (+5V), and connect the leg to ground.
Re: mega drive black and white
RGB wrote:In addition to the 4.433MHz you should change the MB3516A mode to "PAL" - lift the leg #7 of the encoder so that it doesn't touch the pad (+5V), and connect the leg to ground.
so leg 7 is that from above the chip how do i know wich one is leg 7
some of these legs are not solderd !!
http://pdf.datasheetcatalog.com/datashe ... Xrxtqy.pdf
found the datasheed oke wil try after dinner ,so desolder leg 7 and connect it to ground
Re: mega drive black and white
YESSSSSSSSSSSSSSSSSSSSSSSSSSS ITS WORKING I HAVE COLOR ITS OVER 9000