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Thread: Denon dilemma

  1. #1
    Join Date: Aug 2012

    Location: North

    Posts: 2,682
    I'm Steve.

    Thumbs up Denon dilemma

    A good friend of mine has a very frustrating dilemma and in need of a vintage audio specialist who can repair his Denon PMA 850 amplifier. At the moment it is suffering from a lot of distortion. The obvious candidate i.e. Jez can't do it. So in need of someone to take up the challenge.
    WEBSITE.... www.theprogmeister.com

    Golf, a good walk spoiled : M Twain.


  2. #2
    Join Date: Oct 2012

    Location: The Black Country

    Posts: 4,282
    I'm Alan.

    Default

    It's well within my capabilities Steve, so that's one option.

  3. #3
    Join Date: Aug 2012

    Location: North

    Posts: 2,682
    I'm Steve.

    Default

    Quote Originally Posted by Firebottle View Post
    It's well within my capabilities Steve, so that's one option.
    Excellent.
    WEBSITE.... www.theprogmeister.com

    Golf, a good walk spoiled : M Twain.


  4. #4
    Join Date: Jun 2010

    Location: Liverpool

    Posts: 771
    I'm Geoff.

    Default

    Mike Powell in Bolton has serviced and recapped mine to excellent effect.
    Main system: Sony TTS8000; SME IV; Audio Technica Art1; The Lentek integrated amplifier; SBT; Technics sh-x1000 DAC; Yamaha NS1000M.
    System 2 - SBT; Kinshaw Perception DAC; Denon PMA850 integrated; Kef Reference 103.
    System 3 - Taken over by my son! Chromecast; Beresford Caiman II; Klark Teknik Jade 1 active studio monitors.

  5. #5
    Join Date: Aug 2012

    Location: Hartlepool UK

    Posts: 1,374
    I'm Alan.

    Default

    Steve
    I presume this is Neils amp ?
    If its still playing music and has distortion on the old denon I would start with cleaning all switches and pots
    If that doesn't cure it I can have a look at the circuit boards
    I have deoxit so Ill tell him to bring it up on Wednesday

    Alan
    Turntable - Garrard 401/Jelco 750L/Ortofon Kontrapunkt B, Pioneer PLC 590, SME 3009/2 , Denon DL103R - DIY Paradise Phono stage - Reel 2 Reel Studer A810, Otari MX55,Tascam BR20 - Digital HTPC / Young Dac - Preamp - DIY B4, 821, Power Amp's DIY Voyager Mono Block, Speakers Tannoy precision 6.4 / Wilmslow Kit Volt BM220.8 / Scanspeak D2905/9500

  6. #6
    Join Date: Jun 2010

    Location: Liverpool

    Posts: 771
    I'm Geoff.

    Default

    Sometimes with amps of this age, the switches that are not used (typically tape monitor) corrode. Activating them multiple times with, the power off, often works.
    Main system: Sony TTS8000; SME IV; Audio Technica Art1; The Lentek integrated amplifier; SBT; Technics sh-x1000 DAC; Yamaha NS1000M.
    System 2 - SBT; Kinshaw Perception DAC; Denon PMA850 integrated; Kef Reference 103.
    System 3 - Taken over by my son! Chromecast; Beresford Caiman II; Klark Teknik Jade 1 active studio monitors.

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