Sony KV27V10 Convergence

[Dave M.]

When this set was purchased, it looked as if all the Sony 27" sets had poor
convergence in the upper right area of the crt image. I called the service
center about this and they warned me that I would be charged for the trip
to my home if the convergence looked "normal". Therefore, I let it go.

Today, I'm wondering if anyone knows if there is a procedure to remedy the
upper right convergence problem as we normally converge the center of the
image?

Thanks,

Dave M.

 

[kip]

Use little magnets on the rear of the CRT to correct the convergence.

 

[Art]

Suggest geting the service manuel and doing some in-depth studying of that
material before attempting, not a DIY project, IMHO.

 

[Dave M.]

Suggest geting the service manuel and doing some in-depth studying of
that material before attempting, not a DIY project, IMHO.

That is true. However, I'm looking for the solution for a problem that is
probably not addressed in the manual.

It looks as if I can't ask any questions without being labled an amature.
I used to service TV's for a living.

 

[Tech Data]

That is true. However, I'm looking for the solution for a problem that is
probably not addressed in the manual.

It looks as if I can't ask any questions without being labled an amature.
I used to service TV's for a living.

Ok, saw this last night and wondered, since it's over 10yrs old, has it
gotten worse or is it the same and you finally want to resolve it. I
see two options: 1. Purchase some chevron magnets and tack them on the
bell of the tube where the problem is. Might help, might not. Or, 2.
You have a bad crt. I've pasted a repair log from a major retailer's
service center on that series with that problem:

Sony KV27V22 AA-2 CONVERGENCE KV27V22 serial # 8051260 will not
converge the bottom red green or blue horizontal lines Unit has over 6
permaloy magnetic on the CRT bell in the area of the bottom of the
yoke. This is not a good sign. It is also a rebuilt CRT. We are not
going to place more Permaloy strips on this CRT. It needs replacement.

Sony KV27V40 BA4 CONVERGENCE KV27V40 Unit has vertically skewed
convergence. Center vertical convergence is Skewed with red skewed
counter clockwise by 0.5 inches and blue skewed clockwise by nearly the
..05 inched. Green lines are straight. Problem is caused by a defective
CRT.

www.techdata-kicksass.net

 

[Leonard Caillouet]

That is true. However, I'm looking for the solution for a problem that is
probably not addressed in the manual.

It looks as if I can't ask any questions without being labled an amature.
I used to service TV's for a living.

The way you posed the question indicated that you probably don't have much
experience with CRT convergence and purity. Even most "TV techs" should be
careful to start fiddling with it without getting any documentation
available form the manufacturer. Anyone who has the experience to likely
improve convergence on part of a CRT without making it worse or ending up
with an different problem would know that each one is a little different,
and that it is often best to leave it alone if you aren't willing to do the
homework first. No easy solutions to this type of problem...

Leonard

 

[Dave M.]

The way you posed the question indicated that you probably don't have
much experience with CRT convergence and purity. Even most "TV techs"
should be careful to start fiddling with it without getting any
documentation available form the manufacturer. Anyone who has the
experience to likely improve convergence on part of a CRT without
making it worse or ending up with an different problem would know that
each one is a little different, and that it is often best to leave it
alone if you aren't willing to do the homework first. No easy
solutions to this type of problem...

Leonard

I have converged hundereds of crt's I don't know what you are talking
about. There is obviously a communications problem. This set has
convergence off in the upper right portin of the screen on ALL of this
model that I have seen in the stores. I am fully aware that convergence
cannot be perfect over the entire screen area. I am looking for someone who
has attempted to correct the convergence in the region of the screen that I
mentioned. Is that so difficult to understand?

Dave M.

 

[Leonard Caillouet]

I have converged hundereds of crt's I don't know what you are talking
about. There is obviously a communications problem. This set has
convergence off in the upper right portin of the screen on ALL of this
model that I have seen in the stores. I am fully aware that convergence
cannot be perfect over the entire screen area. I am looking for someone
who
has attempted to correct the convergence in the region of the screen that
I
mentioned. Is that so difficult to understand?

If you have converged so many crts, you should know that the adjustment of
corner convergence is usually accomplished by adding magnets to the crt, and
that it is very difficult to efect much change without interacting with
geometry and purity. You should also know that one should always start with
the manufacturer's procedures and verify whether there are any service
bulletins related to the matter. So, as was suggested earlier, get the
documentation, follow Sony's procedure for alignment, get some magnets, and
see what you can get out of it. If you have the experience you should be
able to at least get it back to where it is now and not screw it up. With
such experience, you know, however, that convergence in one corner is very
difficult to correct in a CRT. There are no magic bullets. There are no
Sony service bulletins on the matter for this set, so follow the service
manual as a guide.

Leonard

 

[Max]

Use little magnets on the rear of the CRT to correct the convergence.

most of problem with convergence in sony tv is convergence coil.

 

[kip]

most of problem with convergence in sony tv is convergence coil

And pray tell what is the convergence coil in this Model ?

kip