Sony Walkman D-VM1 Portable CD / DVD Player | Sound issue

Discussion in 'Tech talk' started by thewalkmangallery, Apr 23, 2025.

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  1. thewalkmangallery

    thewalkmangallery Member

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    Hello !

    I recently got a Sony D-VM1 (Japanese model), and everything works perfectly except for the sound. The audio coming from the headphone jack (both on the player itself and the remote/screen) is extremely loud and distorted. The volume buttons respond (you can see the volume icon change when pressed), and the AVLS switch is detected, but none of these controls affect the actual volume, which stays maxed out. I couldn’t find any setting in the menu to fix this. I even tried the test mode by pressing buttons combination that I found in the service manual but couldn't launch the mode).

    I noticed some rust and mold inside the unit and the remote so I cleaned everything with isopropyl alcohol + add some KF F2 Contact Cleaner spray, but it didn’t make any difference.

    Could it be that the player is stuck in AV Out mode (Line Out), even though no AV adapter is connected? (I don’t have the adapter VMC-DW1 to test).
    Or could it be related to the region of my CDs and DVDs as I believe Japan is another Region than EU ? (but it's strange because it manages to read them)

    Any ideas or similar experiences?

    Thanks!

     
    Last edited: Apr 23, 2025
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  2. rcpilot23

    rcpilot23 Active Member

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    Hi,

    Did you work out the issue? My Sony D-VM1 the right channel has a loud buzzing sound the left channel is very quiet and the volume does not work. I thought maybe bad caps but this is from around 2002 which there were no leaking cap issue then. It almost seems like a bad ground as the right channel I can hear like a motor sled noise too when the sled moves.
     
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  3. Mister X

    Mister X Moderator Staff Member

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    I just saw this thread, those are drool-worthy players for looks alone. Sorry I can't help, there's probably a ton of little electronics stuffed in there and any one issue could be the problem. I always check the headphone jack but those tiny speaker wires take a lot of abuse and can become frayed internally. Good luck, hopefully you can get it sorted out.
     
    Last edited: Jun 21, 2026
  4. rcpilot23

    rcpilot23 Active Member

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    Yeah i found the issue.

    I traced the audio signals from the DAC to the Amplifier which has clean clear audio, the issue is with the chip that controls volume.

    So i have bypassed that chip and can control the volume using an inline headphone volume control or a speaker with a volume.
     
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  5. Mister X

    Mister X Moderator Staff Member

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    I'm still jealous, those are really nice, did they only come in red?
     
  6. rcpilot23

    rcpilot23 Active Member

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    Red and Silver

    Luckily I have 2 of them and the other is working perfect
     
  7. rcpilot23

    rcpilot23 Active Member

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    Well I have found a work around to this common issue.

    I have bypassed the AVLS volume control chip which goes bad. There is lots of static with loud distorted sound on one channel and very low sounnd volume on the other channel.

    Once I bypassed the AVLS volume control chip by removing a few SMC components next to the headphone jack I was able to located the 2 x solder points which have the Line out L and R channels.

    Using very thin wire the headphone jack is now connected to the line out which produces clear audio and the volume is slightly to high which can be controlled with an inline headphone volume control cable.

    The headphone socket on the display also works great now too
     

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