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output devices

  1. W

    SX-3800 repair

    I have checked every component on the power supply and audio output boards. Replaced numerous blown resistors, a few caps and the output transistors. If I run it without the output transistors connected, I hear the relay click and the DBT has a dim glow. When I connect the output transistors the...
    • Way San
    • Thread
    • output board output devices pioneer sx-3800
    • Replies: 15
    • Forum: Pioneer Audio
  2. H

    Replacement output transistors for 2SA747 and 2SC116 - Yamaha A-1

    Need to replace a pair of OT’s on a Yamaha A-1. Have a couple of recommendations but can anyone say which transistor pair is best suited OR has worked well in this particular amp (or both, of course!) Would like to place an order today if possible, so all replies much appreciated. Existing...
    • Hifibythekg
    • Thread
    • 2sa747 2sc1116 a-1 output devices output drivers to 3 transistor replacement transistor substitute yamaha a-1
    • Replies: 3
    • Forum: Solid State
  3. K

    SA-8100 Output transistor insulators

    I'm in the final stages of restoring my SA-8100 amp, having replaced the caps, transistors, and a few fried resistors. It is obvious that something really bad happened to the power amp board, so I'm replacing the output transistors as well, assuming they suffered stress along the way. When...
    • kpmadden
    • Thread
    • output devices power amp board recap and restoration sa-8100 sa8100
    • Replies: 3
    • Forum: Pioneer Audio
  4. B

    Output Transistor replacement Crown Amp xs1200

    Hello all of you beautiful people, i have a crown xs1200, i bought it knowing it was blown up. Tore it all apart and quickly identified two failed Output transistors on channel two. Amp is two channels total. Each channel has 8 OP devices. 4 npn and 4 pnp. Removing the two duds (one shorted, one...
    • BDB
    • Thread
    • crown drivers output devices power amp transistors
    • Replies: 14
    • Forum: Solid State
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