Sanyo DP26648 television, white screen.
David Farber
the archives, it has been reported that there is a defective ribbon cable
that causes this problem. One specific report which is detailed here:
http://www.docendi.org/sanyo-t240744.html?s=374b1e6b350125947468fde1448e0935&
says,
"Clean glue like material from spaced further apart trace of FFC ribbon - or
Replace the ribbon wire < P/N: N6CD FFC>
Connects panel to timing control assy."
The comment about the glue like material makes sense. The second part about
the "further apart trace," doesn't make sense to me.
Secondly, the connector that is interfaced with the cable seems to be one of
those zif connectors. Anyone know the sweet spot on how to open those
things? I know that one push in the wrong direction will snap that thing
right off the pc board. If need be, I can photograph it and upload it later.
Thanks for your reply.
--
David Farber
David Farber's Service Center
L.A., CA
David Farber
Here is a link to a picture of the connector.
http://members.dslextreme.com/users/farberbear/Repair/zif.html
Sansui Samari
> David Farber wrote:
> > This Sanyo DP26648 television powers up with a white screen. Looking
> > through the archives, it has been reported that there is a defective
> > ribbon cable that causes this problem. One specific report which is
> > detailed here:
>
>
>
>
> > says,
>
> > "Clean glue like material from spaced further apart trace of FFC
> > ribbon - or
>
> > Replace the ribbon wire < P/N: N6CD FFC>
>
> > Connects panel to timing control assy."
>
> > The comment about the glue like material makes sense. The second part
> > about the "further apart trace," doesn't make sense to me.
>
> > Secondly, the connector that is interfaced with the cable seems to be
> > one of those zif connectors. Anyone know the sweet spot on how to
> > open those things? I know that one push in the wrong direction will
> > snap that thing right off the pc board. If need be, I can photograph
> > it and upload it later.
>
> > Thanks for your reply.
>
>
> Thanks for your reply.
> --
> David Farber
> David Farber's Service Center
> L.A., CA
From the looks of the cable, with no experience on this set at all...
Many of the zif connectors look alike from the top, but the way they
actually disconnect is told by looking at the ends of them. Usually,
you can pull the black piece up a hair, and slip the cable out. Some
cheap connectors want to break if you pull the top header off all of
the way. Some cables have interlocks though, so you can't pull the
cable out without taking the header off. I haven't seen these in a
long time outside of industrial applications.
David Farber
I wound up prying underneath the black piece very gently with two small
screwdrivers. I just made my way across the piece with the screwdrivers
putting slight pressure on it. It took several times to see any progress.
Eventually, the piece started to rotate and finally stood up at a right
angle. I got the feeling that one extra ounce of force was going to destroy
that thing.
I really didn't see anything that resembled glue in or near the connector.
There was some double-sided tape midway down the cable to secure it but I
don't see how that could have interfered with the connections.
David Farber
I received the new cable today and installed it. Problem fixed. I guess that
was a good tip after all.
bitdog
I fixed my Sanyo dp26648 by working over the ribbon cable as advised.
The zif connector was a hinged black flap with a snap hook on each
end.
Prying up the middle away from the cable, then prying the ends up,
worked.
The corrosive glue didn't appear to corode the cable in any way,
but stuck the cable so firmly that care in pulling the cable away
evenly
so the cable wouldn't stretch or warp was imperative ?
Glue removal by rubbing in one direction rolled it off.
Then LPS #1 for a corrosive cleaner/lubricant/corrosion-inhibitor
helped
make E-contact for the ribbon when reconnected, and then the TV-LCD
worked fine.
So no parts were required & the real problem seemed to be bad
electrical connections
on the ribbon cable ends, possibly due to a thin cable in a high
pressure socket,
directly over a heat source & the cable ends might not be corosion
resistant ?
I got a free DP26648 & fixed it for free in a half hour....
Thankx again to all
bitdog