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amplifier board

  1. M

    A Yamaha R-1000 receiver with a badly behaving power amplifier board...

    I can usually muddle my way through board repairs but this one still has me stumped. It is with the right channel power amplifier board for a Yamaha R-1000 receiver. It came with a blown left channel Sanken 2SA1169 which I replaced with a NTE93 (in OEM packaging from a reputable US based...
    • michael_w
    • Thread
    • amplifier board repair advice help needed yamaha r-1000 yamaha r-2000
    • Replies: 7
    • Forum: Yamaha
  2. H

    Yamaha CR-1020 idling current not adjusting

    Hi, On a Yamaha CR-1020 I’m having trouble getting the idling current to adjust to anywhere near 10mV. Left channel: 100.4mV Right channel: 0 mV Following Merrylander’s advice (see below) I’ve replaced both 2SA844 transistors that sit just under the variable resistor. I’ve also replaced both...
    • Hifibythekg
    • Thread
    • amplifier board idle current merrylander power supply board yamaha cr-1020
    • Replies: 140
    • Forum: Solid State
  3. O

    ONKYO integra TX-DS989 Help solve no sound

    Hi All, I have an Onkyo TX-DS989 AV Receiver that is not producing any sound. I have tried the headphone plug as well, and no sound there either. I hear 2 relay clicks when I power the unit on and press the "stand-by" button. There are 7 identical capacitors that are either swollen...
  4. Mitchellk

    Pioneer Sx-850 amplifier board issues

    Hello, I am having an issue with a Pioneer sx-850. R38 and Q6 on the power amplifier assembly is running very hot. So hot you can't touch either within a couple of seconds of turning on the power to the unit. The radio was playing fine when I smelled smoke and found that VR3 had a burn spot on...
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