Suggestion On Where to Look. Kenwood KA-35000 amp

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  • VHAALNPATTET
    New Member
    • Nov 2024
    • 3
    • United States
    #1

    Suggestion On Where to Look. Kenwood KA-35000 amp

    I have a Kenwood KA-35000 amp. I've recapped all the electrolytic capacitors recently. When I first turn the unit on I get a few second hum and a small pop sound on speakers and then silence. I am able to play music, etc without an issue after wards. Because it occurs only at the initial powering up each time and only last a few seconds I am having trouble figuring out how to troubleshoot.

    The one other thing I noticed that during the powering off there is a slight hum and quiet pop sound. This I hadn't noticed before. The KA-3500 has a muting circuit that when unit is powered off the music fades over about a 8 to 10 second period. I've tested the circuit and everything seems to be within normal range but will replace the transistors, diodes, and resistors.

    I have the schematics, basic tools, etc but am just starting to try and teach myself basic troubleshooting. Any suggestions on where I might look on vintage 1970 amplifiers would be much appreciated. If anyone also has suggestions on how to isolate things - suggested resources on troubleshooting, etc please offer.
    Tags: None
    • stj
      Great Sage 齊天大聖
      • Dec 2009
      • 31170
      • Albion
      #2
      see if it uses a relay to disconnect the speakers.
      then test it

        Comment

        • VHAALNPATTET
          New Member
          • Nov 2024
          • 3
          • United States
          #3
          Thanks for suggestion. Checked parts list as well as schematics and even google search. No relay in its circuits.

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