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Roland jazz chorus 120 early version ser no 615335

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  • Roland jazz chorus 120 early version ser no 615335

    Hi . This amp is in a right mess. But I now got it working
    One of the reported faults is chorus and vibro not working
    No change in the sound whatever. I went looking for a schematic but can't seem to find the right one. Component reference are all wrong and the chips being used are different
    This has a ta7200 -mn3002 - tc4013 and tc4011 .
    Checked with the pot ref and again none match .
    Depth vr14 speed vr15 reverb vr12
    I have searched the net and here and download a load . But none seem to be correct.
    If anyone can shed some light on this
    Many thanks
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