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About tus

  1. XS1200 troubles

    good day ! it's me again. almost all XS1200's diagram is drew. Amplifer works if protection is short-circuited. A problem is - broken controller PIC16C57C. I have a programmer for it and looking for firmware now.. Could anyone share it , please? Igor, Murmansk, Russia
  2. good day! XS1200 ampl. does not sound. broken tr516, tr519, d506, fet600 were replaced with new ones. Now all looks like normal, but it's no sound still. Power is good +65V, -65V ( this slowly grows to -82V for about 5 min), +15V, -15V . Operate ampls ( tl072cn) work properly. I have no idea about ic1 pic16c57.. maybe it forbids ampl to do.. I need an electrical circuit for this ampl. May anybody help , pls? There is no service closely. murmansk, russia