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repair channel diagnostics

  1. B

    Help with Nak BX-100 electronic troubleshooting

    Hi. My pandemic hobby has been getting back into tapes and I figured it'd be fun to learn how to do basic maintenance on my Naks, so I bought a "does not work" BX-100 to practice on. The transport was a complete mess (either 10 year old 7up residue or someone used sticky tape on the idler to...
    • bhurkeal
    • Thread
    • bx-100 nakamichi repair channel diagnostics
    • Replies: 19
    • Forum: Tape
  2. Ray122

    Marantz 4270 Help...

    Alright, so I've got a Marantz 4270 with a bad channel, spitting out DC and throwing it into protection mode. Only one of the output transistors was shot, I believe it was the one that handles the negative swing. Otherwise, all the semiconductors on the board and otherwise are testing OK. I can...
    • Ray122
    • Thread
    • 4270 amplifer help marantz marantz 4270 output drivers repair repair channel diagnostics repair help
    • Replies: 6
    • Forum: DIY
  3. RoyAbles

    need repair advice denon DRA 685

    I recently picked up a Denon DRA 685 at the local thrift store. The problem is the left channel is dead with a hum, it's not the typical AC hum but its there none the less. The right side has sound but it's nowhere near loud enough and has the same buzz at a lower volume. IS the unit's sound...
    • RoyAbles
    • Thread
    • advice repair channel diagnostics
    • Replies: 33
    • Forum: DIY
  4. Mastagrog

    Parasound HCA-2003A, Bad Channel Repair Help

    First off, Hello to all! I have been creepn' on this site for years and has provided tons of useful information and decided to finally join up! The Back Story: Bought a Parasound HCA-2003A amplifier off craigslist about a month ago for a decent price in assumed good condition. I did not test...
    • Mastagrog
    • Thread
    • parasound repair repair channel diagnostics
    • Replies: 12
    • Forum: Solid State
  5. jurgenkoppen

    Marantz 1170 left channel is gone

    Hi, I am new to this group. I have a Marantz 1170 which developed an issue. One channel is no longer available, not through the main speakers, nor through the headphone jacks. I am wondering if anyone in this group had encountered similar problem, and where I might start my search for the blown...
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