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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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Yamaha DVD-S1200 Diag help
Hi All,
I have a fair background in resurrecting VCRs, TVs and computers, but I have never really tried my hand at DVD players. My friend gave me a DVD player to repair, and I thought I would bring this by you all for some hints, and maybe even a diagnosis. It is a Yamaha DVD-S1200, which I believe is a relabeled Panasonic RP-91. confirmation of that would be helpful, but it won't solve the issue. In short the DVD player works normally for about an hour, then inexplicably stops being able to read the DVD. This happens with any DVD, we've tried many of them. It starts as a skipping, then it says it can't read the disk. If I stick another DVD in, it says it isn't a supported type. One other odd thing? A music CD played once when I put it in after the error. I'm going to try to generate the exact errors, and will report back. Any suggestions? I'm doing this primarily to learn, partly to not give up on something that cost $900 four years ago. Any suggestions and guidance will be appreciated. Daniel |
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"Daniel C. Jensen" bravely wrote to "All" (27 Mar 05 19:35:21)
--- on the heady topic of "Yamaha DVD-S1200 Diag help" Could be the spindle motor drawing too much current due to a segment short. A metal shard can often get lodged inbetween 2 segments and cause this. The short is often partial when the motor is cold but as the grease/oil melts the motor draws increasing current until the servo can't manage it any more. IIRC the motor rpm increases as the DVD plays which means even more current is drawn. Try spraying a bit of contact cleaner into the brush area and run the motor a bit in hopes of dislodging the metal shard. If it doesn't improve replace it. Watch out for a potential solvent flash if you use too much. I tried it once on a shopvac power switch and the motor vents turned into a pretty impressive afterburner! DCJ From: "Daniel C. Jensen" DCJ Xref: aeinews sci.electronics.repair:44303 DCJ Hi All, DCJ I have a fair background in resurrecting VCRs, TVs and computers, but DCJ I have never really tried my hand at DVD players. DCJ My friend gave me a DVD player to repair, and I thought I would bring DCJ this by you all for some hints, and maybe even a diagnosis. DCJ It is a Yamaha DVD-S1200, which I believe is a relabeled Panasonic DCJ RP-91. confirmation of that would be helpful, but it won't solve the DCJ issue. DCJ In short the DVD player works normally for about an hour, then DCJ inexplicably stops being able to read the DVD. This happens with any DCJ DVD, we've tried many of them. It starts as a skipping, then it says DCJ it can't read the disk. If I stick another DVD in, it says it isn't a DCJ supported type. DCJ One other odd thing? A music CD played once when I put it in after the DCJ error. I'm going to try to generate the exact errors, and will report DCJ back. DCJ Any suggestions? I'm doing this primarily to learn, partly to not give DCJ up on something that cost $900 four years ago. DCJ Any suggestions and guidance will be appreciated. DCJ Daniel .... Power is obtained by current meeting resistance |
#3
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The likelihood is the laser pickup is bad. This is extremely common on DVD
players, and the symptoms you mention are the classic symptoms of a weak or failing pickup. Mark Z. "Daniel C. Jensen" wrote in message ... Hi All, I have a fair background in resurrecting VCRs, TVs and computers, but I have never really tried my hand at DVD players. My friend gave me a DVD player to repair, and I thought I would bring this by you all for some hints, and maybe even a diagnosis. It is a Yamaha DVD-S1200, which I believe is a relabeled Panasonic RP-91. confirmation of that would be helpful, but it won't solve the issue. In short the DVD player works normally for about an hour, then inexplicably stops being able to read the DVD. This happens with any DVD, we've tried many of them. It starts as a skipping, then it says it can't read the disk. If I stick another DVD in, it says it isn't a supported type. One other odd thing? A music CD played once when I put it in after the error. I'm going to try to generate the exact errors, and will report back. Any suggestions? I'm doing this primarily to learn, partly to not give up on something that cost $900 four years ago. Any suggestions and guidance will be appreciated. Daniel |
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