Question about Koss KS3102 System

5 Answers

DVD plays few minutes than screen freezes with pixels

Must unplug and start the DVD over.

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  • ruthouzts Dec 27, 2008

    I am trying to watch Mamma Mia (a brand new DVD) after about 10-12 minutes the screen freeses with scattered pixels on the screen. It has happened on other DVD's in recent weeks.

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5 Answers

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  • Master
  • 1,239 Answers

Hi
Try cleaning the DVD lens with a cotton swab moistened with isopropyl alcohol. The DVD lens is what emits the laser from the unit. Let it dry and try again. Also try using a different DVD. Let us know if it worked and don't forget to rate me :)

Posted on Dec 27, 2008

  • ABHISHEK.C
    ABHISHEK.C Dec 27, 2008

    first step should be to clean the optical pick up unit. There is a special CD for cleaning of the optical unit (wet method).

    If this does not provide a solution please come back and advice.

    Best regards,



  • ABHISHEK.C
    ABHISHEK.C Dec 27, 2008

    for any clarification please contact me

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  • Master
  • 10,594 Answers

I think laser optical block got stuck when it move forward. (sled servo problem)

Please observe lens movement If you can open top cover of unit.

Take out loaded disc and move optical block to inward and outward position by holding it in your finger and make sure dont touch lens itself to avoid finger prints on it.

Posted on Dec 27, 2008

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  • Master
  • 6,966 Answers

Hi and welcome to FixYa,

Initially, the act of unplugging is simulating a reset just like in a computer. And just like in a computer, if a reset corrects the problem, then it was a glitch in the Operating System. In the Koss KS3102, it would be the firmware.

Another possibility would be hardware. Offhand, a possibly problem with the power supply of the unit, more specifically the standby +5VDC. Probably a filter capacitor either in the primary (most likely) or on the secondary (least likely).

Pls post back any other indicators if observed. Additionally, pls try to measure the resistance of the speaker through the speaker wires, should be between 4~8 ohms. This is just to eliminate the off chance possibility that the speaker is causing an auto protect.

Good luck and Thank you for using FixYa.

Posted on Dec 27, 2008

  • Louie  Role
    Louie Role Dec 27, 2008

    Based on your additional information, try a CD disc cleaner
    that is readily available from most audio/video stores and even
    computer stores. They are designed to look and play like regular discs
    but with a brush like attachment designed to clean the lens.

    Cheers.


  • Louie  Role
    Louie Role Dec 27, 2008

    It may also be worth your while to check on the small shafting that
    guides the carriage of the laser pickup. Dirt, grime, dust and
    solidified lubricant can cause stoppage of the carriage and the laser
    eye then fails to read the next track. Please refer to the image below.



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  • Koss Master
  • 19,396 Answers

That means that there is a short on one of the imputs or an internal problem.

Unplug all wires, and start the unit with minimal connections (one input or none, and only two speakers).
If you still have the problem, you need to send the unit for repair.

Call the number listed on te owner manual to get support.

Posted on Dec 27, 2008

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  • Master
  • 3,422 Answers

Hi,
Please describe your problem in detail.

Posted on Dec 27, 2008

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