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main amplifier

  1. O

    Yamaha CA-2010 enters speaker protection during warm-up

    I have a problem with a CA-2010 that I hope someone who understands a schematic could help me out with. I have done my best to read up on the various threads already available on the topic of CA-2010 going into speaker protection. The relay clicks (closes) a couple of seconds after powering up...
    • OlaG
    • Thread
    • main amplifier speaker protection relay
    • Replies: 4
    • Forum: Yamaha
  2. J

    Marantz 2215B Power Supply Transistor Subs

    Hi all, I am currently restoring a Marantz 2215b as my first restoration. I am working on the power amp and I am having trouble sourcing a suitable replacement transistor for H709 and H710. The originals were 2SA684 which folks have said to substitute with KSA1220AY. However KSA1220AY is out of...
    • J85t
    • Thread
    • 2215b 2sa684 ksa1220 main amplifier marantz obsolete p700 restoration substitute transistor
    • Replies: 9
    • Forum: Marantz Audio
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