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Thread: Video repair upgrade kits for A600 A1200

  1. #1
    tbtorro.com VIP
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    Default Video repair upgrade kits for A600 A1200

    Selling composite video repair/upgrade kits for A1200 and A600. As some of you may know the bandpass filters and delay line components are custom and not sold anywhere, so if they get damaged by capacitor leak, or heat (during soldering for example) then your composite video will suffer or disappear. The bandpass filters are inside the metal can like component arrays as shown below, but you don't need to remove them after installation of this video kit.

    Click image for larger version. 

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    The solution is a newer and better SONY encoder chip with a small adapter PCB, that has these filters built in, so the external custom filters are not needed anymore and you can restore a decent video output. Main symptoms of external filters dying are color bleed and ghosting. On modern LCD screens the color bleed and ghosting is more noticeable, on CRT screens is less important (IMHO). Furthermore the newer SONY video chip also has S-VIDEO output so you can also solder a socket to the S-VIDEO pins if you prefer that video output type for an even better picture. This kit will also improve the composite signal somewhat - but please don't expect miracles - it'll be still a composite output.

    Before: After:
    Click image for larger version. 

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    Installation (no need to remove old compoents from your board):

    R1: 16K R2: 47K C1,C2: 100nF

    Remove the old chip: Not connected pads: Solder connected pads: Solder top components: Finished installation:
    Click image for larger version. 

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    PCB design is by myself (tbtorro) and the original circuit idea is by Daniel Tufvesson. You can read more about the project here. The sale is for the components and the adapter only, won't be able to provide support.

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    I'm asking 12 per kit + PP fees + shipping.

    Shipping to Europe is 6€ unregistered parcel at your own risk. Or 19€ registered.

    As per forum rules: If you only write "Interested" on the thread, nothing will happen until you send a PM. You need to send a PM (Personal Message) with how many kits you need and your address exactly as it should show on the parcel. No cherrypicking please (can I have x without y) what you see on sale is what you get.

    Feedback: Please leave feedback as per the site rules after you've received your stuff. Here is a guide how:
    http://www.amibay.com/showpost.php?p=60784&postcount=3

    Please have a look at my other new Commodore chips/parts listings:
    Brand-NEW-Amiga-4000-Rev-B-motherboard
    Amiga-4000-A3660-CPU-card-including-Rev-5-CPU-NEW-professionally-built
    NEW-Amiga-4000-motherboard-component-packs-build-your-OWN-Amiga
    060-adapters-for-A3640-WarpEngine-spring-mini-sale
    Amiga-1200/600/CD32-Premium-recap-and-upgrade-service
    Amiga-4000-Premium-recap-and-upgrade-service
    Full-GAL-set-and-sockets-for-A3640-A3660-CPU-cards-NOS
    Video-repair-upgrade-kits-for-A1200/A600
    KickStart-3-1-4-ROM-chips-for-A1200/A600/A4000/A3000/A500/A2000
    A4000-RTC-repair-kits
    AGNUS-8372A-PAL-chips-(318069-02)-NOS
    DMAC-(390563-02)-for-Amiga-3000-A590-A2091-NEW-chips
    A3640-CPU-Cards-Rev-3-2-upgrade-chips-new
    Service-for-Amiga-4000-3000-2000-1200-600-A3640-A3630
    Last edited by tbtorro; 17th March 2021 at 17:27.
    cє<

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    Declare interest in x4 kits

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    Amibayer! timtheloon's Avatar
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    Very Interesting



    I've got a A600 motherboard where the component that is going across it IC in the picture has come off would this be the reason why I'm not getting an Image?
    Got too many Amigas, Think I gotta problem


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    Quote Originally Posted by timtheloon View Post
    Very Interesting



    I've got a A600 motherboard where the component that is going across it IC in the picture has come off would this be the reason why I'm not getting an Image?
    Nope, that is just a decoupling capacitor to help with noise. You should still have a video out. If you don't then you either have capacitor corrosion damage or faulty delay lines (as explained above) or both.
    cє<

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    This just handles the composite video out, right? If you don't use the composite (with an Indivision or video card say) this doesn't do anything for you? Or would I need it for something else as well?

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    Quote Originally Posted by Pgovotsos View Post
    This just handles the composite video out, right? If you don't use the composite (with an Indivision or video card say) this doesn't do anything for you? Or would I need it for something else as well?
    Only for composite.
    Last edited by tbtorro; 15th March 2018 at 17:41.
    cє<

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    Inactive Member Pgovotsos's Avatar
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    Quote Originally Posted by tbtorro View Post
    Quote Originally Posted by Pgovotsos View Post
    This just handles the composite video out, right? If you don't use the composite (with an Indivision or video card say) this doesn't do anything for you? Or would I need it for something else as well?
    Only for composite.
    Thanks. Sorry for the stupid question. I wanted to make sure.

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    Inactive Member MnemonicOverload's Avatar
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    I'm assuming you would need a different chip for NTSC Amigas, since the document says the bandpass filters in the original circuit have different values and the filter is internal to the chip?

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    Interested in two kits.

  10. #10
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    Received with thanks, super fast posting !

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