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Thread: Request Marshall MG100HCFX schematic

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    Thumbs up Request Marshall MG100HCFX schematic

    Yesterday I got it( Marshall MG100 HCFX) for repairs.The foot switch connecting circuit is burnt.Kindly help me find the schematic for it.Thank you all.

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    This is the new disposable series,I don't think it's possible to repair if smd parts are burnt,no scheme.

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    Quote Originally Posted by alexradium View Post
    This is the new disposable series,I don't think it's possible to repair if smd parts are burnt,no scheme.
    Very simple circuitry.
    Repaired for 5 min.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	Footswitch.png 
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    Master Destroyer nosaj's Avatar
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    Quote Originally Posted by doctor View Post
    Very simple circuitry.
    Repaired for 5 min.
    And once again the doctor wows with a schematic

    nosaj

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    Thanks Doctor for your help.Repaired Marshall amp within one hour,without schematic you sent for me it was very difficult.Thanks again for your cooperation.

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    Senior Member vintagekiki's Avatar
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    Quote Originally Posted by doctor View Post
    Very simple circuitry.
    Repaired for 5 min.
    Why part schematic, why not the whole schematics.

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    Don't forget the joker g1's Avatar
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    Quote Originally Posted by vintagekiki View Post
    Why part schematic, why not the whole schematics.
    I would assume because of NDA (non-disclosure agreement).

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    Senior Member vintagekiki's Avatar
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    Quote Originally Posted by g1 View Post
    I would assume because of NDA (non-disclosure agreement).
    Thank you

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    Do you have the power transistor section of the schematic?

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    Senior Member vintagekiki's Avatar
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    Quote Originally Posted by stevenrb718 View Post
    Do you have the power transistor section of the schematic?
    I think that Marshall series MG100... in output uses IC TDA7293.
    Maybe can help schematis for Marshall MG100HDFX

    https://music-electronics-forum.com/showthread.php?t=14816&p=117754&viewfull=1#post117754

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    Quote Originally Posted by vintagekiki View Post
    I think that Marshall series MG100... in output uses IC TDA7293.
    Maybe can help schematis for Marshall MG100HDFX

    https://music-electronics-forum.com/showthread.php?t=14816&p=117754&viewfull=1#post117754
    nope,the cfx one has discrete transistors in CFP configuration,the fan spins only when it gets too hot,i repaired one reflowing some solderings,lead free is the best you know....

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