Sony WM DD11 - Capacitors replaced - low sound in right channel

Discussion in 'Tech talk' started by rahul_unde, Dec 30, 2024.

  1. rahul_unde

    rahul_unde New Member

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    I happen to complete the recap of this Sony WM DD11. Sound seems to be restored to back to its original loudness levels. But the sound in right channel is very faint and low at full setting.

    Can anyone please suggest possible fixes for this low sound?.

    I have attached a picture of the board before cap replacement.
     

    Attached Files:

  2. Valentin

    Valentin Well-Known Member

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    Sound on R is faint and low only at full setting, but fine otherwise ?
    If so would measure the potentiometer resistance during a full rotation.
    The pot has 10kΩ, so you should see the resistance varying between ~10kΩ at minimum setting and 10-20Ω at maximum setting.
     
  3. rahul_unde

    rahul_unde New Member

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    Hi @Valentin the sound in R is low at all settings. Should I check for any resistors specifically to right channel sound?.
     
  4. Valentin

    Valentin Well-Known Member

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    Does the volume level vary (even a tiny bit) on R channel with different settings of the potentiometer ?
     
  5. rahul_unde

    rahul_unde New Member

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    Hi @Valentin , yes the volume does vary about 20% at from 0-10 steps setting. However the total audio volume level output at 1oth step is 20%. I checked this with and without cassette inserted in play mode.

    *Wish you a great new year friend!
     
  6. Valentin

    Valentin Well-Known Member

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    No need to mention me and say Hi at every post. Keep in mind this is a public forum, not a discussion between you and me.
    Also no need to quote previous messages. Instead of using the "Reply" button (which quotes automatically), you can type in the box below and press "Post Reply".

    What I would check (assuming you don't have means to measure the signal at different points) are the following:
    - head connection and if the head itself is clean;
    - solder joints on the new capacitors;
    - damaged traces or vias near new capacitors (potentially affected by leakeage);
    - volume potentiometer resistance at max setting (see post #2);
    - headphone jack (both soldering and clean it);
     

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