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- Dec 7, 2000
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I decided to post a topic about this since I was curious, and couldn't find an answer. You have to perform this mod to get CSYNC from the Neo Geo CDZ.
I opened up my CDZ, and confirmed that it has the same issue as the toploader -- composite video is connected to the sync pin on the multi out, rather than CSYNC. You can see that composite video and sync are connected in the photo below:
You can see the same issue for the toploader detailed here:
http://retrorgb.com/ngcdcsync.html
Just like the fix for the toploader, you need to cut the traces connecting sync to composite. Cut in the places marked red:
You have to pull csync from the MB3516A video encoder chip on the other side of the board. Per the data sheet here http://pdf.datasheetcatalog.com/datasheet/FujitsuMicroelectronics/mXrxtqy.pdf pin 10 is CSYNC in. Xian Xi already has this part documented on his site: http://www.jamma-nation-x.com/jammax/images/tuts/cdz-rgb.jpg
Unfortunately, it's a surface mount chip, so you will have to run a wire from the front side of the board to the back:
The sync signal will be too strong and could damage your equipment, so add a 470 ohm resistor (console side) followed by a 220uF capacitor (positive side facing console/resistor, negative side facing sync output to TV) to the wire. Here I've run the wire from pin 10 of the MB3516A to the back side of the motherboard:
And here's the completed mod. Don't forget to add the resistor and capacitor (not shown). You have to reconnect the composite video with a jumper wire, like with the toploader mod:
I opened up my CDZ, and confirmed that it has the same issue as the toploader -- composite video is connected to the sync pin on the multi out, rather than CSYNC. You can see that composite video and sync are connected in the photo below:
You can see the same issue for the toploader detailed here:
http://retrorgb.com/ngcdcsync.html
Just like the fix for the toploader, you need to cut the traces connecting sync to composite. Cut in the places marked red:
You have to pull csync from the MB3516A video encoder chip on the other side of the board. Per the data sheet here http://pdf.datasheetcatalog.com/datasheet/FujitsuMicroelectronics/mXrxtqy.pdf pin 10 is CSYNC in. Xian Xi already has this part documented on his site: http://www.jamma-nation-x.com/jammax/images/tuts/cdz-rgb.jpg
Unfortunately, it's a surface mount chip, so you will have to run a wire from the front side of the board to the back:
The sync signal will be too strong and could damage your equipment, so add a 470 ohm resistor (console side) followed by a 220uF capacitor (positive side facing console/resistor, negative side facing sync output to TV) to the wire. Here I've run the wire from pin 10 of the MB3516A to the back side of the motherboard:
And here's the completed mod. Don't forget to add the resistor and capacitor (not shown). You have to reconnect the composite video with a jumper wire, like with the toploader mod:
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