Sega CDX repair specialists needed

Discussion in 'Repair, Restoration, Conservation and Preservation' started by dcmastercaster, May 13, 2013.

  1. dcmastercaster

    dcmastercaster Member

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    Hey all,

    I have a CDX that I think needs some repairing. It resets every once in awhile while I am randomly playing CD games on it. Sometimes it will freeze while trying to read the next section of the disc or sometimes it won't load at all. I am using a 10v AC adapter and I plan on buying a better one from retrogamecave as soon as they become available. The console doesn't reset when I am playing cartridge games. Also, the first time I played Snatcher on the same console, it didn't have any problems, but this was about two years ago. Could it just be a problem with the disc or is the CDX getting a little old?
    If anyone can repair it, I'd really appreciate it. I would like to keep it within the US but if no one in the US can do it, I understand.
    (Update: I think I have narrowed it down to a capacitor issue after doing some research here. However, I have zero knowledge/expertise in repairing them, so I would still love someone's help in that regard.)

    Thanks!
    (P.S. I have posted similar threads on racketboy and sega-16 and I was referred here. You can check out my rep on sega-16. I post under the same name.)
     
  2. gelcila

    gelcila Rising Member

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    Hi guy, don't have much experience with CDX (also in electronics in General), but the problem may be simpler than you think. Have you opened? cleaned the lens? you Tried to adjust the laser pot? you cleaned the cartridge slot?
    I've had lockups on CDX cartridge games simply why the slot and the contact of the cartridges were dirty. And also with the CD games that froze or not started, and with these methods I have it working perfectly again.
    Be very careful when opening the CDX, make a map for the screws, and open it with great care.
    The power supply that you use is not the original CDX?
    If the solutions above do not work, then the problem may actually be in some components such as capacitors on the Board, probably caused by a non original CDX font. I've had some problems with some versions of the Sega CD by using a different font from the original.
    The brazilian CDX has this input specifications: 9,5V and 1,5A, then a 10V can harm the Board over the years.

    Anyway, hope it's not anything serious and that my tips help in something.
     
  3. Flash

    Flash Dauntless Member

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    Wrong! There's VRM and 0.5v won't make any difference. However it's better not to run it from 12v+ PSU since there's no heatsink on VRM chip. Also anything below 9v won't be enough and will cause glitches.

    And it's better not to touch laser pot unless it's absolutely necessary - overdo it just by a tiny bit and you'll get a dead laser in less than a month.
     
    Last edited: May 14, 2013
  4. dcmastercaster

    dcmastercaster Member

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    I didn't go anywhere near the laser and I have just stopped playing it altogether until I can find someone who can repair it. Thanks for all of the useful info, though!
     
  5. Bad_Ad84

    Bad_Ad84 The Tick

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    Probably needs recapping
     
  6. dcmastercaster

    dcmastercaster Member

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    Can anyone here do recapping?
     
  7. gelcila

    gelcila Rising Member

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    I did not know that the CDX had VRM, in fact didn't even know what was it, my knowledge is still limited, so therefore I thought that any excess voltage to go (even if only 0,5V) with over time could harm the console Board.

    Fleeing some of the focus of the topic, I have a Sega CD 2 with audio problem, I've read a lot about that and saw that one of the causes is the use of a non-original power supply device, in my case I used a power supply of the Mega Drive, and read that the solution is to change ALL the motherboard capacitors of the Sega CD.
    Can you tell me two questions?
    Why this occurs? The power supply of the Mega Drive/Genesis works so different from that of the Sega CD 2, or the Sega CD had a poorly designed architecture?
    And this is caused by a different source really or is there some other reason?

    Already on the laser pot it can carry out this adjustment, but have to be very careful, mark the original position and rotate it something almost insignificant as 1 degree or less and go testing, of course best if it doesn't have security is hiring someone with experience in the subject. If it tries to process laser adjustment pot can bring good results if done correctly.
     
    Last edited: May 15, 2013
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