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Do not recognise/read empty/prerecorded DVD

Panasonic dvd recorder DMR-ex85 wont read any DVD disc
Drive clicking and sounds like its not loading
Panasonic DMR-EX85 is 18 months old. It happened out of the blue. After dubbing from the hard disk it said, "recording may be lost because disc has scratches, dirt or quality of the disc. ..use another disc.." but there are no apparent scratches on it. Tried to load other dvd, prerecorded or empty, the same message appears "disk not recognized". Yes, the awkward noise is heard at the time the dvd is loaded...In addition, with no disc loaded, the display shows a disc is in the drawer...

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  • c274 Jan 10, 2009

    It is obviously trying to read the disc, but fails to and says "not read". At restart, after recovery tests it seems that it recognises an error and repeats the same message "part or all of the last disc recording may be lost due to scratches etc". Key points are that no disc can be read or is recognised (prerecorded or empty) and that the disc icon ramains on the display even with an empty drawer. Tried already before and now with a special cleaning dvd but it does not work, not recognised either.
    Additional problem now is that a piece of cotton is in the drive after I tried to clean the laser head. Can the drive be open?

  • c274 Jan 10, 2009

    Drive is boxed. How can I access the laser head? I did tried with a long plastic pin and cotton on it, this is why cotton was left inside :((( Can I open the box? Note that this is a Panasonic dmr-ex85 UK version

  • c274 Jan 10, 2009

    The details provided in my additional comments would normally lead to a more precise advice. The assumptions made as part of the solution proposed are very general;would expect something more precise from the experts.

  • c274 Jan 10, 2009

    I took the risk and opened the recorder this afternoon. I did open the drive (upper part),had access to the inside and cleaned the laser lens. All put back but same problem persists. Cleaning disc has already been tried as soon as the problem appeared. Neither this disc is recognised

  • c274 Jan 11, 2009

    Will try the proposed solution, i.e. change the lens. Hope it will work. Thanks

  • c274 Jan 11, 2009

    I did not understand the meaning of the last sentence saying "As far as fixing that well you might have to buy a new one usually can't do much to fix it, ive tried many times on many things and only messed it up worse."

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  • 199 Answers

As it would seem that you are unable to view Benimur's 2nd post, with his indulgence, may I repost...

Hi again and appreciate the update.

You might be interested with the Panasonic offer of $130 flat-rate repair. For more information, pls contact 1-800-211-7262 or 1-888-439-2676

Since it would appear that you are performing a DIY (do-it-yourself) repair, it would be to your added advantage access to a service manual or at the very least a schematic diagram with voltage readings. The inside of your Panasonic DMREX85 would look similar to below image.
Do not recognise/read empty/prerecorded DVD - f1aedf6.jpg
The black center enclosure is the DVD drive assembly. Opening the top portion would reveal the bottom half where the laser optics, carriage and mechanism are house. Below image is of another version/model that closely resembles your model.
7b9c713.jpg
Should cleaning be not sufficient to address your concern, then the laser optics have to be replaced. Often the laser assembly alone is not that readily available. Instead, the whole DVD is replaced. The part number would be stenciled on the top portion. In some versions/models, this would be VXY1772-S RAM DRIVE UNIT and would closely reDo not recognise/read empty/prerecorded DVD - 2b2ca21.jpgimage below.
2b2ca21.jpg
Pls confirm the part number. For reference, VXY1772-S are available from here, here and here.

Incidentally, some versions of this series often has faulty capacitor in the power supply section. This would be 2 pcs of 680uF/16V P/N F2A1C6810023. Since they are meant to provide ripple filter, it would actually be an Do not recognise/read empty/prerecorded DVD - 931a326.jpgto replace them with 1000uV/25V. Pls reference below image.
931a326.jpg
Relevant information were referenced from here, here and here.

Cheers.

Posted on Jan 11, 2009

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  • 846 Answers

Usually a clicking noise means the laser head on the track that it follows to read the disc. Sounds like its getting stuck or stopping at a certain point which would explain why it won't read any disc now. Typically the laser makes one sweep from the outside of the disc to the inside checking it thats the "load up". As far as fixing that well you might have to buy a new one usually can't do much to fix it, ive tried many times on many things and only messed it up worse.

Posted on Jan 10, 2009

  • Quickfx PC Repair Jan 11, 2009

    ive had the same problem on many things, dvd players cd players and can never fix the laser on its track usually just gets worse. So theres not alot you can do to fix it is what I meant.



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  • 431 Answers

Try replacing the lens

Posted on Jan 10, 2009

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Hi and welcome to FixYa,

Unfortunately, your described problem indicates that the laser optics is finding it hard to read or write. This could be brought about by dirt/dust or failure. Initially, try to clean using a CD disc cleaner. Should problem persist, it may require replacement of the optics. If the cost of repairs and downtime would be factored in, then you may have to re-evaluate your options reconsider the repair.

Pls post back result(s). Good luck and Thank you for using FixYa.

Posted on Jan 10, 2009

  • Louie  Role
    Louie Role Jan 10, 2009

    Hi again and appreciate the update.

    You might be interested with the Panasonic offer of $130 flat-rate repair. For more information, pls contact 1-800-211-7262 or 1-888-439-2676

    Since it would appear that you are performing a DIY (do-it-yourself) repair, it would be to your added advantage access to a service manual or at the very least a schematic diagram with voltage readings. The inside of your Panasonic DMREX85 would look similar to below image.

    The black center enclosure is the DVD drive assembly. Opening the top portion would reveal the bottom half where the laser optics, carriage and mechanism are house. Below image is of another version/model that closely resembles your model.

    Should cleaning be not sufficient to address your concern, then the laser optics have to be replaced. Often the laser assembly alone is not that readily available. Instead, the whole DVD is replaced. The part number would be stenciled on the top portion. In some versions/models, this would be VXY1772-S RAM DRIVE UNIT and would closely resemble the image below.

    Pls confirm the part number. For reference, VXY1772-S are available from here, here and here.

    Incidentally, some versions of this series often has faulty capacitor in the power supply section. This would be 2 pcs of 680uF/16V P/N F2A1C6810023. Since they are meant to provide ripple filter, it would actually be an advantage to replace them with 1000uV/25V. Pls reference below image.

    Relevant information were referenced from here, here and here.

    Cheers.

×

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  • 3,422 Answers

Hi,

see if the player tries to read the disc. Load a disc and listen.
Does the player make squealing noises or is it totally quiet? Squealing noises may indicate that the player is trying to synchronize with the disc but can't due to an obstruction on the lens or in the laser path inside the pickup or a defect in the pickup. This can also be caused by an intermittent signal problem due to a faulty ribbon cable.

Totally silent means that the photo sensor is not getting any usable input from the laser at all, meaning that the pickup is blind for lack of a better word.
This can be caused by an obstruction of the beam by foreign matter on the lens or inside the pickup all the way to a marginal or failed laser diode and/or photosensor array. This can also be caused by a bad ribbon cable with one or more severed traces.

You could try to clean the optics. This is the most common malfunction as far as i know in all disc players. It would involve taking the cover off and finding a way to expose the lense, and then cleaning it with a very gentle brush. some players have a cover for the lense that swings to the side during playing, this greatly reduces the chance of dust accumulating but it is still better to give it a try.

If you see dust on the lense, then its just that simple. clean, close, play.

check on the small shafting that guides the carriage of the laser pickup. Dirt, grome, dust and solidified lubricant can cause stoppage of the carriage and the laser eye then fails to read the next track.

Do not recognise/read empty/prerecorded DVD - 7972e38.jpg

Posted on Jan 10, 2009

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