Sony 27" s-video problem

M

Mark

Guest
I have a 27" Sony tv which I think has a cold solder joint. I got it in
1997. For about a year, the s-video connection has been extra sensitive
to movement. If you touch the cable, it will go from no picture, to
black and white, and if you pull on the cable a little in one direction,
it will go back to normal. I was able to "bandaid" the problem by
pulling the cable with some tape...

Just this week, it's got worse. The screen is blank unless the connector
is held "just right" and any small vibration in the room will cause it
to lose a picture. (I also tried different svideo cables)

I took the back cover off the tv and I was wondering if I heat the
"legs" that are connected to the PCB, should this fix the problem. It's
impossible for me to get at the front of the PCB to resolder the joints,
I could only reheat from the back where the connector legs go through
the board which is soldered.

The tv is still working perfect with composite and RF connections.

Does this sound like a cold solder joint on the s-video pins/legs?
Thanks for reading!

-Mark
 
The connections can only be resoledered from the circuit board side.

Mark Z.



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"Mark" <singlecoil@webtv.net> wrote in message
news:12817-3FEE7A5A-102@storefull-3177.bay.webtv.net...
I have a 27" Sony tv which I think has a cold solder joint. I got it in
1997. For about a year, the s-video connection has been extra sensitive
to movement. If you touch the cable, it will go from no picture, to
black and white, and if you pull on the cable a little in one direction,
it will go back to normal. I was able to "bandaid" the problem by
pulling the cable with some tape...

Just this week, it's got worse. The screen is blank unless the connector
is held "just right" and any small vibration in the room will cause it
to lose a picture. (I also tried different svideo cables)

I took the back cover off the tv and I was wondering if I heat the
"legs" that are connected to the PCB, should this fix the problem. It's
impossible for me to get at the front of the PCB to resolder the joints,
I could only reheat from the back where the connector legs go through
the board which is soldered.

The tv is still working perfect with composite and RF connections.

Does this sound like a cold solder joint on the s-video pins/legs?
Thanks for reading!

-Mark
Click to expand...
 
I have a 27" Sony tv which I think has a cold solder joint. I got it in
1997. For about a year, the s-video connection has been extra sensitive
to movement.
Click to expand...
Simple fix, but it will require you to remove the back cover of the TV set. It
will also require proficiency with soldering to properly perform the fix.

What you would have to do is find the soldering leads that connect the s-video
connector to the mainboard. Then you carefully remove the old solder from the
joint using the iron and desoldering braid, make sure the solder pads on the
board are clean, then reflow the joint with fresh solder. Make sure the solder
is the correct type and of decent quality. I've used the RadioShack silver
bearing solder with fairly good results. - Reinhart
 
Hi, I was able to fix it by sticking a peice of plastic with electical
tape on the tv cover. When the cover is screwed back on the tv, the
peice of plastic pushes against the svideo board which fixes it.

With the back off, and plugged in, I found out that by pressing against
the video board, the color would come back, so I tried the above fix.

The reason I didn't attempt to resolder the bad joint, is because I
found it too difficult to get in front of the PCB. Maybe I will try this
once I safely know how to remove the board.

-Mark
 
On Sun, 28 Dec 2003 01:38:18 -0500 (EST) singlecoil@webtv.net (Mark)
wrote:

I have a 27" Sony tv which I think has a cold solder joint. I got it in
1997. For about a year, the s-video connection has been extra sensitive
to movement. If you touch the cable, it will go from no picture, to
black and white, and if you pull on the cable a little in one direction,
it will go back to normal. I was able to "bandaid" the problem by
pulling the cable with some tape...
Click to expand...
You might want to try another S-video cable first, just in case the
problem is in the cable rather than the TV.

Once you're sure that the problem is in the TV, the solder joint will
have to be worked on from the solder side.

-
-----------------------------------------------
Jim Adney jadney@vwtype3.org
Madison, WI 53711 USA
-----------------------------------------------
 
Hi, I was able to fix it by sticking a peice of plastic with electical
tape on the tv cover. When the cover is screwed back on the tv, the
peice of plastic pushes against the svideo board which fixes it.
Click to expand...
This is not a fix, but a quick-fix that will only allow the problem to get
worse, perhaps with unforseen consequences such as warpage or other damage to
the component and/or even the mainboard itself.

If the cable is not at fault, then it does sound like your set has cold solder
joints.
If you don't know how to fix it properly, then hire the services of a
professional (or at least someone who knows what they're doing) who will
perform the necessary repairs for you.

The reason I didn't attempt to resolder the bad joint, is because I
found it too difficult to get in front of the PCB.
Click to expand...
You have to get *underneath* the board, not in front of it, if the problem is
with cold solder joints. - Reinhart
 
"Mark" <singlecoil@webtv.net> wrote in message
news:13082-3FF1FF61-138@storefull-3178.bay.webtv.net...
Hello,

(M) "Hi, I was able to fix it by sticking a peice of plastic with
electical tape on the tv cover. When the cover is screwed back on the
tv, the peice of plastic pushes against the svideo board which fixes
it."

(R) "This is not a fix, but a quick-fix that will only allow the problem
to get worse, perhaps with unforseen consequences such as warpage or
other damage to the component and/or even the mainboard itself."

(M) I'll fix it properly if I had a guide, I'll get the sony service
manual. It's not that I don't know how to solder, it's getting the board
out without damaging anything or getting shocked.

(R) "If the cable is not at fault, then it does sound like your set has
cold solder joints."

(M) Yes, I tried a different cable. I'm using a cheaper, not as stiff
cable now.

(R) "If you don't know how to fix it properly, then hire the services of
a professional (or at least someone who knows what they're doing) who
will perform the necessary repairs for you."

(M) I'd rather learn how to take it apart, because I know two other
people with Sony's with similar problems.

(M) "The reason I didn't attempt to resolder the bad joint, is because I
found it too difficult to get in front of the PCB."

(R) "You have to get *underneath* the board, not in front of it, if the
problem is with cold solder joints. - Reinhart"

(M) The connector board is upright. Access to the board without removing
the board is next to impossible, which is why I said "in front". If I
had the board out laying flat, then you are correct, it would be
underneath. Poor phrasing on my part.
Click to expand...
It's not really that hard, just remove the screws and slide the chassis out,
then you can unplug the cables and remove that board, or you could take it
to a shop and likely get it fixed for ~$50, or find someone who's worked on
TV's and see if they'll do it for a case of beer, I know I would if it were
near me.
 
Hello,

(M) "Hi, I was able to fix it by sticking a peice of plastic with
electical tape on the tv cover. When the cover is screwed back on the
tv, the peice of plastic pushes against the svideo board which fixes
it."

(R) "This is not a fix, but a quick-fix that will only allow the problem
to get worse, perhaps with unforseen consequences such as warpage or
other damage to the component and/or even the mainboard itself."

(M) I'll fix it properly if I had a guide, I'll get the sony service
manual. It's not that I don't know how to solder, it's getting the board
out without damaging anything or getting shocked.

(R) "If the cable is not at fault, then it does sound like your set has
cold solder joints."

(M) Yes, I tried a different cable. I'm using a cheaper, not as stiff
cable now.

(R) "If you don't know how to fix it properly, then hire the services of
a professional (or at least someone who knows what they're doing) who
will perform the necessary repairs for you."

(M) I'd rather learn how to take it apart, because I know two other
people with Sony's with similar problems.

(M) "The reason I didn't attempt to resolder the bad joint, is because I
found it too difficult to get in front of the PCB."

(R) "You have to get *underneath* the board, not in front of it, if the
problem is with cold solder joints. - Reinhart"

(M) The connector board is upright. Access to the board without removing
the board is next to impossible, which is why I said "in front". If I
had the board out laying flat, then you are correct, it would be
underneath. Poor phrasing on my part.
 
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