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oscillations

  1. E

    Superscope R1240 / Marantz 1040 receiver - oscillations

    Hello! I've been working on a Superscope R-1240 which I posted about in another thread: Superscope R-1240 (Expert TA 940) Now I've solved some of the initial issues. But I would like to get some input about another(?) issue which I hope there might be some experience about in the Marantz forum...
    • E029127
    • Thread
    • oscillating oscillations transistor replacement
    • Replies: 0
    • Forum: Marantz Audio
  2. T

    Marantz receiver 2245 amplifier board oscillations.

    Hello I am working on Marantz 2245 board and trying to figure cause of oscillations when I increase supply voltage. This happened when voltage reach 21VDC or so and see HF oscillations of the sinusoidal signal. When DC is back down to 20.5VDC there is no oscillation . I have checked several...
    • Traverse
    • Thread
    • audio amplifier repair marantz oscillations
    • Replies: 18
    • Forum: Marantz Audio
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