Audio fault on Sony MPD-850 laserdisc player - anyone got ..

[Guest]

Archived from groups: alt.video.laserdisc,uk.media.home-cinema (More info?)

I recently dug out my not-used-in-years Sony 850 preparatory to
selling it, and discovered that it's developed an audio fault. At
first the sound was distorted and "sawtoothy", and then it disappeared
completely. The video is fine, there's just no audio coming out of the
player at all - not from any of the rear outputs or the headphone
socket.

Given how little the player is worth now it's obviously going to be
uneconomic to take it to a Sony service centre for repair (assuming
that they even still repair them!), so does anyone have a service
manual that they might be willing to scan the relevant parts of, or
even just an idea about what the problem might be and advice on where
to look inside the machine? I'd obviously like to think it's something
fairly straightforward, like a capacitor drying out, rather than some
impossible-to-replace proprietary component.

Any advice gratefully appreciated!

 

[robin]

Archived from groups: alt.video.laserdisc,uk.media.home-cinema (More info?)

i remember doing work on audio board on this player some years ago to
upgrade it to do dolby digital output.

if i recal the board is the small one in the back corner.

i did have a manual at one time but think i chucked it about a year ago.

robin..


"GR71" <cheo0901-google@yahoo.co.uk> wrote in message
news:dcee10d7.0411150441.42dbb40a@posting.google.com...
>I recently dug out my not-used-in-years Sony 850 preparatory to
> selling it, and discovered that it's developed an audio fault. At
> first the sound was distorted and "sawtoothy", and then it disappeared
> completely. The video is fine, there's just no audio coming out of the
> player at all - not from any of the rear outputs or the headphone
> socket.
>
> Given how little the player is worth now it's obviously going to be
> uneconomic to take it to a Sony service centre for repair (assuming
> that they even still repair them!), so does anyone have a service
> manual that they might be willing to scan the relevant parts of, or
> even just an idea about what the problem might be and advice on where
> to look inside the machine? I'd obviously like to think it's something
> fairly straightforward, like a capacitor drying out, rather than some
> impossible-to-replace proprietary component.
>
> Any advice gratefully appreciated!

 

[Guest]

Archived from groups: alt.video.laserdisc,uk.media.home-cinema (More info?)

Have you tried switching between analog and digital audio? The audio comes
from two separate paths and then chosen by a relay at the output. If both
are bad then you most likely have a power failure, if only the analog is
good then either the laser output is weak or you'll have to debug the
digital decoding chips.

Kurtis


"GR71" <cheo0901-google@yahoo.co.uk> wrote in message
news:dcee10d7.0411150441.42dbb40a@posting.google.com...
>I recently dug out my not-used-in-years Sony 850 preparatory to
> selling it, and discovered that it's developed an audio fault. At
> first the sound was distorted and "sawtoothy", and then it disappeared
> completely. The video is fine, there's just no audio coming out of the
> player at all - not from any of the rear outputs or the headphone
> socket.
>
> Given how little the player is worth now it's obviously going to be
> uneconomic to take it to a Sony service centre for repair (assuming
> that they even still repair them!), so does anyone have a service
> manual that they might be willing to scan the relevant parts of, or
> even just an idea about what the problem might be and advice on where
> to look inside the machine? I'd obviously like to think it's something
> fairly straightforward, like a capacitor drying out, rather than some
> impossible-to-replace proprietary component.
>
> Any advice gratefully appreciated!