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Thread: Ask general Genesis/MD/Sega CD/32X questions here (for new members)

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    Hi all. I've just acquired my first SegaCD (CD model 2, using with a Genesis model 2 VA3) and had a technical question. When playing CD games, the audio seems to pass through to the Genesis' original AV port fine, so what's the point of the CD unit having its own red/white RCA audio out? Is the audio from the CD base higher quality than from the passthrough? Thanks for your help!

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    Quote Originally Posted by billybob884 View Post
    Hi all. I've just acquired my first SegaCD (CD model 2, using with a Genesis model 2 VA3) and had a technical question. When playing CD games, the audio seems to pass through to the Genesis' original AV port fine, so what's the point of the CD unit having its own red/white RCA audio out? Is the audio from the CD base higher quality than from the passthrough? Thanks for your help!
    The red and white RCA jacks are line level intended for a device that has a volume control such as a boombox, audio receiver or yes a TV.

    Edit: Yeah a Genesis model 2 has stereo audio and by adding additional jacks to the Sega CD base provided flexibility like them playing an audio compact disc you can run it to audio receiver. Also not many people back in the day would listen to their TV from a audio receiver.
    Last edited by EyeDeeNo76; 11-06-2019 at 11:13 PM.

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    Quote Originally Posted by EyeDeeNo76 View Post
    The red and white RCA jacks are line level intended for a device that has a volume control such as a boombox, audio receiver or yes a TV.

    Edit: Yeah a Genesis model 2 has stereo audio and by adding additional jacks to the Sega CD base provided flexibility like them playing an audio compact disc you can run it to audio receiver. Also not many people back in the day would listen to their TV from a audio receiver.
    Gotcha, thanks for the quick reply. So if you use a composite cable out from the Genesis AV, is the stereo RCA from there also line-level?

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    Nonconformist Hedgehog-in-TrainingWCPO Agent EyeDeeNo76's Avatar
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    Boy oh boy the forum was super slow yesterday on my end so I give up trying to respond.

    Quote Originally Posted by billybob884 View Post
    Gotcha, thanks for the quick reply. So if you use a composite cable out from the Genesis AV, is the stereo RCA from there also line-level?
    Yes the model 2's red and white plugs of the audio & video cable are line level.

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    Hi guys !
    My CDX is faulty and I'd like to have some help because I'm stuck right now ...
    The problem is that when booting the CD part, I see the planet but it's not going further, nothing is moving, no Sega CD stuff, it's just stuck ...
    The Genesis cartridge part is just working great on his side. I also tried to boot the CD player by putting 2 batteries inside and it's playing audio CDs with no issue.
    What I've done so far :
    - I replaced all capacitors on each boards -> No improvement
    - I replaced the battery soldered on the board (Z1) -> No improvement
    - I reworked solders from 315-5860 and 315-5632 using flux and fresh solder -> No improvement
    - I checked for continuity for each pins that connects main board and CD board to make sure that each board are connected together as expected ...
    - I tried to boot CDX bios using an Everdrive, I got the same result : CD screen stuck at the beginning !

    So I'm stuck right now, is there something I should check first now ? Is there a king of debug bios allowing to had clue on what part of the bios boot process is failing ?
    Thanks for your help, I'm dying to make this CDX to work, I was so happy to get one, but repairing it is turning into a nightmare

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    I have a short after the 7805 regulator on the output and ground somewhere-removed regulator and probed. No power at all, but power jack and D2 get hot (d2 tested good) when power is connected. Tested power LED and it is working. Also checked for proper function of power switch. Appreciate any help- just cant bring myself to toss in trash. D2 gets very hot as

    EDIT: Looks like it has the Samsung KA2195D.

    Last edited by HotPotato; 01-27-2020 at 01:28 AM.

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