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output board

  1. david winter

    Kenwood KA-5002 - Correct schematic (or compilation of known variants) ?

    Hi, I have an early KA-5002 (serial 250498) which doesn't match the two schematics that I have. I noticed the following differences : - A completely different protection board under the chassis: smaller, no ref, only 4 transistors (of which two 2SC1213, one 2SC883 and one 2SA537A). No schematic...
  2. JamesWest...

    Channel output Issue Marantz 1150

    Hello dwellers of the Marantz subforum. :) I am seeking knowledge about a Marantz 1150 (not the D model). This amp is a friends, and they asked me to take a look at it. I have a rudimentary knowledge of electronics (mainly tinkering with them for fun) and can solder confidently. A bit of...
    • JamesWest...
    • Thread
    • 1150 amplifier repair marantz marantz 1150 output board repair advice repair advice help needed repair amplifier repair help
    • Replies: 9
    • Forum: Marantz Audio
  3. AshhBoy_

    dbx cx3-mkI faulty channel repair

    After having my cx3 fixed because of a dead right channel on arrival, I used it daily for about two years with mostly no issues. Two days ago, I fired it up to discover my right channel was presenting a large ac-synced humming noise. I quickly unplugged everything and checked all my wiring, to...
    • AshhBoy_
    • Thread
    • channel failure dbx dbx cx3 operational amplifier output board preamp repair transistor
    • Replies: 4
    • Forum: Solid State
  4. 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
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