Question about channel issue on AU-717

Discussion in 'Exclusively Sansui' started by cowdog360, Sep 11, 2017.

  1. cowdog360

    cowdog360 Active Member

    Messages:
    137
    Location:
    Vancouver, WA
    Hello,

    I recently did a full Leestereo style recap and upgrade on a friends AU-717. He's telling me that now the right channel occasionally drops out, and now when it is working it has less bass than the left. After he turns it on/off a few times the channel comes back. I'm curious as to whats going on here, any obvious place to start? I know he's had some issues with the switch on the back causing problems (the preamp bypass switch). I'm thinking of looking at that first as the potential culprit.
     
  2. Hyperion

    Hyperion Roobarb & Custard Subscriber

    Messages:
    40,187
    Location:
    Hertfordshire, UK
    Good idea.

    Unless you took the switch apart to clean it (not for the feint hearted), you are very unlikely to have got it clean enough.
     
  3. ManyMoonsAudio

    ManyMoonsAudio AKA paul79 Sponsor Subscriber

    Messages:
    3,279
    Location:
    Tulsa Ok (C-Ville)
    Cleaning it will likely cure your problem. There is a reed relay back there that could be dirty as well. This kind of jives since power cycling brings it back....
     
  4. Hyperion

    Hyperion Roobarb & Custard Subscriber

    Messages:
    40,187
    Location:
    Hertfordshire, UK
    Sorry Paul, no reed relay on the AU-717, I think you are thinking of the AU-919, but relay talk is appropriate as the 'power cycling thing' could be the speaker relay playing up. ;)
     
  5. petehall347

    petehall347 the brandy coffee man

    Messages:
    23,816
    Location:
    uk.. the middle bit
    rule out the switch with rca cables
     
  6. skippy124

    skippy124 AK Subscriber Subscriber

    Messages:
    1,575
    Location:
    Sydney Australia
    Hi Pete,

    The 717(and 517) always has the switch in circuit, so the jumper trick may not work in this instance

    Cheers

    John
     
    Overundr1 likes this.
  7. petehall347

    petehall347 the brandy coffee man

    Messages:
    23,816
    Location:
    uk.. the middle bit
    it might work .it depends if this is the problem or not and where if any corrosion is in the switch . p.s thanks for the heads up . first time i studied that switch .
     

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