A couple people were moving my 154-lb Sony 30-inch 16:9 CRT to
another residence and it got dropped a couple feet, hitting the guy's
foot to "cushion" one side of it. It fell on the heavy front side of
course. Minor cabinet scratches. It powers on, receives OTA stuff
very well! No broken glass!!!

Problem: palm-size green blotch in upper left corner with a matching
red blotch in the upper-right corner. My handy little degausser coil
cannot make the blotches go away. Picture otherwise is very crisp and
clear. Audio is fine. Hope aperture grill is OK.

Any hints on what to physically look for once I get the back cover
off? Of course, it's just out of warranty.

Degauss coil unplugged is my hunch...I just don't know what it looks
like, or something else with some heavy mass that could have shifted
when the set got dropped face-first.

Thanks,
Gary

On Feb 22, 8:16 pm, "K4GPB" wrote:
A couple people were moving my 154-lb Sony 30-inch 16:9 CRT to
another residence and it got dropped a couple feet, hitting the guy's
foot to "cushion" one side of it. It fell on the heavy front side of
course. Minor cabinet scratches. It powers on, receives OTA stuff
very well! No broken glass!!!

Problem: palm-size green blotch in upper left corner with a matching
red blotch in the upper-right corner. My handy little degausser coil
cannot make the blotches go away. Picture otherwise is very crisp and
clear. Audio is fine. Hope aperture grill is OK.

Any hints on what to physically look for once I get the back cover
off? Of course, it's just out of warranty.

Degauss coil unplugged is my hunch...I just don't know what it looks
like, or something else with some heavy mass that could have shifted
when the set got dropped face-first.

Thanks,
Gary

Assuming the yoke did not move, which it probably didn't: The
aperature grill is damaged.

You might be able to use crt magnets to get a watchable but not very
good convergence or geometry in the corners picture.

Warranty would not apply in any case as it was not a manufactures
defect but physical abuse damage.

"K4GPB" wrote in message
ups.com...
A couple people were moving my 154-lb Sony 30-inch 16:9 CRT to
another residence and it got dropped a couple feet, hitting the guy's
foot to "cushion" one side of it. It fell on the heavy front side of
course. Minor cabinet scratches. It powers on, receives OTA stuff
very well! No broken glass!!!

Problem: palm-size green blotch in upper left corner with a matching
red blotch in the upper-right corner. My handy little degausser coil
cannot make the blotches go away. Picture otherwise is very crisp and
clear. Audio is fine. Hope aperture grill is OK.

Any hints on what to physically look for once I get the back cover
off? Of course, it's just out of warranty.

Degauss coil unplugged is my hunch...I just don't know what it looks
like, or something else with some heavy mass that could have shifted
when the set got dropped face-first.

Thanks,
Gary

The yoke may have moved, but the degaussing coil did not come unplugged.
You most likely have damaged the aperture grill hangers.

Leonard

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K4GPB wrote:
A couple people were moving my 154-lb Sony 30-inch 16:9 CRT to
another residence and it got dropped a couple feet, hitting the guy's
foot to "cushion" one side of it. It fell on the heavy front side of
course. Minor cabinet scratches. It powers on, receives OTA stuff
very well! No broken glass!!!

Problem: palm-size green blotch in upper left corner with a matching
red blotch in the upper-right corner. My handy little degausser coil
cannot make the blotches go away. Picture otherwise is very crisp and
clear. Audio is fine. Hope aperture grill is OK.

Any hints on what to physically look for once I get the back cover
off? Of course, it's just out of warranty.

Degauss coil unplugged is my hunch...I just don't know what it looks
like, or something else with some heavy mass that could have shifted
when the set got dropped face-first.

Thanks,
Gary

Sorry to tell you... It's toast! You will have to live with it.
The aperture grill (which is inside the CRT) has shifted or bent.
There is no way to perfectly repair this.
As another person mentioned, small magnets taped to some spots on the
back of the CRT might help, but the CRT is irreperably damaged.

So how's your friend's foot after it "cushioned" the set?

Ugh. Picture on that TV was really great the first 1.5 years of its
life.

Maybe I will round up some really strong (from old hard drives?)
magnets and borrow wife's hot glue gun.

His foot is black and blue, but not broken.

Thanks guys.

Gary

"K4GPB" wrote in message
ups.com...
Ugh. Picture on that TV was really great the first 1.5 years of its
life.

Maybe I will round up some really strong (from old hard drives?)
magnets and borrow wife's hot glue gun.

His foot is black and blue, but not broken.

Leave it be for 2 or 3 weeks (use it normally) and see if it fixes itself.

If it ain't REALLY broke . . . . fixing it may make it worse.


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K4GPB wrote:
A couple people were moving my 154-lb Sony 30-inch 16:9 CRT to
another residence and it got dropped a couple feet, hitting the guy's
foot to "cushion" one side of it. It fell on the heavy front side of
course. Minor cabinet scratches. It powers on, receives OTA stuff
very well! No broken glass!!!

Problem: palm-size green blotch in upper left corner with a matching
red blotch in the upper-right corner. My handy little degausser coil
cannot make the blotches go away. Picture otherwise is very crisp and
clear. Audio is fine. Hope aperture grill is OK.

Any hints on what to physically look for once I get the back cover
off? Of course, it's just out of warranty.

Degauss coil unplugged is my hunch...I just don't know what it looks
like, or something else with some heavy mass that could have shifted
when the set got dropped face-first.

Thanks,
Gary

Dislodged shadow mask, probably the tube has been
permanently damaged.
If so, you might try to (gently) hit the tube, in
the hope that the mask might pop back into place.
(small chanche.)

"K4GPB" wrote in news:1172198127.821468.299970
@q2g2000cwa.googlegroups.com:

Ugh. Picture on that TV was really great the first 1.5 years of its
life.

Maybe I will round up some really strong (from old hard drives?)
magnets and borrow wife's hot glue gun.

His foot is black and blue, but not broken.

Thanks guys.

Gary


Your homeowners insurance may cover the damages (to his foot AND the TV).




--
bz 73 de N5BZ k

please pardon my infinite ignorance, the set-of-things-I-do-not-know is an
infinite set.

remove ch100-5 to avoid spam trap

Sorry to tell you... It's toast! You will have to live with it.
The aperture grill (which is inside the CRT) has shifted or bent.

Er I beg to differ: I have seen this before there is only one fix.
In my 15 years with Sears service I have fixed many a Sony TV.

With the biggest rubber mallet I could could find, I smacked the
screen and only the screen. The aperture in Sony CRT's is made of fine
wires like a harp. I got the CRT that I had back in shape. The wire
used as an aperture does have memory. If you are lucky like I was the
aperture will remember where it was before it was dropped.
Sony CRT's have like 4 inch thick screens, shine a laser pointer on
the screen if you don't believe it. The pointer will reflect off the
phospher 4 inches below the surface.
So if you think implosion is possible don't do it. I guess I've been
lucky and never seen a CRT implode.

73

N8ZU

Problem: palm-size green blotch in upper left corner with a matching
red blotch in the upper-right corner. My handy little degausser

When Sony Engineer told us in a training class that you DONT ever ever
try to degause a Sony CRT, I asked him why?

It seems the aperture being made of very fine wires is pre magnetized
at the factory.

Any attempt to degause the screen could demagnetized the aperture
wire.

73

N8ZU

Very interesting mallet idea! Many thanks again.


The tricks with the spinning magnets on a drill bit are mentioned over
he http://www.madville.com/link.php?id=123683&t=23, but they don't
apply to this great fine-pitch CRT, probably one of Sony's best ever
CRTs. It's a lengthy thread but with a few chuckles.

Gary

"Don't ever" is not what I have been told by Sony. This would not make
sense anyway. Sony sets typically have the most powerful degausing coils of
CRT sets. What we were told is to only manually demagnetize the CRTs when
you have to, and preferably use a smaller coil. After hearing this myth
repeatedly I have questioned several Sony tech reps over the years on the
matter ad they say the same thing. They tend to emphasize caution because
there are so many idiots out there who don't pay attention and understand
the nature of what they are doing. I have degaussed many that would not
clear up with the sets coils working properly. There is often no other way
to do it but manually. The rule is do just enough to clear the magnetic
effects to get purity.

This "don't ever" nonsense is as foolish as saying to never use any supplier
other than Sony for parts. A grain of truth taken to an extreme by not
understanding fully what is going on.

Leonard

"ray13" wrote in message
oups.com...


Problem: palm-size green blotch in upper left corner with a matching
red blotch in the upper-right corner. My handy little degausser

When Sony Engineer told us in a training class that you DONT ever ever
try to degause a Sony CRT, I asked him why?

It seems the aperture being made of very fine wires is pre magnetized
at the factory.

Any attempt to degause the screen could demagnetized the aperture
wire.

73

N8ZU



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K4GPB wrote:
Ugh. Picture on that TV was really great the first 1.5 years of its
life.

Maybe I will round up some really strong (from old hard drives?)
magnets and borrow wife's hot glue gun.

His foot is black and blue, but not broken.

Thanks guys.

Gary




No, if you do that it will most certainly be damaged beyond repair. You
want weak magnets, like the sort of rubbery refrigerator magnets that
come in the mail with advertisements on them. Likely it will never be
perfect again though.

ray13 wrote:
Sorry to tell you... It's toast! You will have to live with it.
The aperture grill (which is inside the CRT) has shifted or bent.


Er I beg to differ: I have seen this before there is only one fix.
In my 15 years with Sears service I have fixed many a Sony TV.

With the biggest rubber mallet I could could find, I smacked the
screen and only the screen. The aperture in Sony CRT's is made of fine
wires like a harp. I got the CRT that I had back in shape. The wire
used as an aperture does have memory. If you are lucky like I was the
aperture will remember where it was before it was dropped.
Sony CRT's have like 4 inch thick screens, shine a laser pointer on
the screen if you don't believe it. The pointer will reflect off the
phospher 4 inches below the surface.
So if you think implosion is possible don't do it. I guess I've been
lucky and never seen a CRT implode.

73

N8ZU



4 inch? Try more like 1 inch. I dissected a 27" Sony tube a few years
ago that had been dropped, it was already cracked and up to air when I
found it.

Well, tomorrow I'll take a look at the glass thickness with the light
from my laser level gadget and then try the mallet on the Sony
KD-30XS955 CRT face and see what happens. The TV is across town and
has been in the back of a minivan all week since the "drop test" and
darn, nobody stole it! ;-)

--Gary

Laser beam showed phosphors about 1 inch behind front of CRT. Did
about 10 min of beating with 16 oz. mallet. No change in symptom
except a lot of vertical shimmering while the beatings took place.
It's toast.
Next, I may remove cover and look for any purity(?) magnets that may
have been dislodged, just in case they used any in the factory.

--Gary

K4GPB wrote:
Laser beam showed phosphors about 1 inch behind front of CRT. Did
about 10 min of beating with 16 oz. mallet. No change in symptom
except a lot of vertical shimmering while the beatings took place.
It's toast.
Next, I may remove cover and look for any purity(?) magnets that may
have been dislodged, just in case they used any in the factory.

--Gary



You might have some luck adjusting the yoke, it's unlikely but you never
know.

Turn the set upside down, and drop it again from the same height as the
first drop.

Well, after a month of sitting in the back of a daily-driven mini-van,
it still has the same lousy pictu

http://picasaweb.google.com/GaryK4GPB/DroppedSony

It has suffered many beatings with the biggest mallet I could buy!


Gary

K4GPB wrote:
Well, after a month of sitting in the back of a daily-driven mini-van,
it still has the same lousy pictu

http://picasaweb.google.com/GaryK4GPB/DroppedSony

It has suffered many beatings with the biggest mallet I could buy!



Try the "magnet trick," discussed here on April 14, "Panasonic with
purity problems somehow repaired":


http://groups.google.com/group/sci.e...9897ff2c7946c2

Cool...thanks so much for the pointer.

I have some magnets (from some disk drives) that are quite strong that
I could probably fasten with some silicon RTV caulk or something.

Gary

K4GPB wrote:
Cool...thanks so much for the pointer.

I have some magnets (from some disk drives) that are quite strong that
I could probably fasten with some silicon RTV caulk or something.

Gary



That'll be WAY too strong, think something along the lines of those
rubber magnetic refrigerator decals.

James Sweet wrote:
K4GPB wrote:
Cool...thanks so much for the pointer.

I have some magnets (from some disk drives) that are quite strong that
I could probably fasten with some silicon RTV caulk or something.

Gary



That'll be WAY too strong, think something along the lines of those
rubber magnetic refrigerator decals.

The April 14 poster said there are two techniques. One is to fasten
small magnets on the CRT. The second is to take a big, powerful magnet
(he used a speaker magnet) and slowly withdraw it from the CRT, to
magnetize it in a way that reverses the original problem! This will
require some experimentation....

spam " writes:

James Sweet wrote:
K4GPB wrote:
Cool...thanks so much for the pointer.

I have some magnets (from some disk drives) that are quite strong that
I could probably fasten with some silicon RTV caulk or something.

Gary



That'll be WAY too strong, think something along the lines of those
rubber magnetic refrigerator decals.

The April 14 poster said there are two techniques. One is to fasten
small magnets on the CRT. The second is to take a big, powerful magnet
(he used a speaker magnet) and slowly withdraw it from the CRT, to
magnetize it in a way that reverses the original problem! This will
require some experimentation....

If the aperture grill is dislodged, nothing will help.

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Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/
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Gee, I was all set to try some of Harbor Freight's retrieving
magnets!
http://www.harborfreight.com/cpi/cta...emnumber=36904

Wish there was a NASA centrifuge I could spin this sucker in, to get
that grill back in position.

Got a lotta $ in that set. Homeowners ins. won't cover it. Oh well.

This has been a mini "support group" for me. ;-)

Already tried a slew of business-card size fridge magnets.



-Gary

Bought two of Harbor Freight's 100-lb force retrieving magnets at
$4.99 each tonight.

Each is now sitting on top of the cabinet, above CRT face at approx.
45-degree angle to front, at each corner. I may put NASCAR decals on
each. ;-)

Picture is vastly improved and OTA 1080i HD from UNC Chapel Hill
station is great! Still have one small purity-problem area in lower
corner that I can fix with another magnet.

The aperture grill is getting tugged in the right directions, for now!
May unplug the auto-degausser soon too.

Gary