Yamaha DVD-S1200 Diag help

[Daniel C. Jensen]

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

 

[Asimov]

"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" <[email protected]>
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

 

[Mark D. Zacharias]

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.