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More ramblings on my "repaired" TV

D

davexnet02

Jan 1, 1970
0
When I first got my 27 inch XBR in 1992, the
settings for color were GCUT=6 and BCUT=6.

During the big Los Angeles quake of 1994,
the TV experienced a severe shaking. The TV
seemed to work fine, save for the fact that
the picture was more blue than before, so I set
BCUT=2, and I've been using it that way till now.
I surmised at the time that something must have worked loose
and there was probably a cold solder joint somewhere.

During my recent experience with complete picture failure
and my subsequent soldering on the A and CRT board,
besides the restoration to normal operation, the Blue color
was now noticeably "low". Imagine my surprise
when normal blue (at least to my eyes) was restored
when the setting was put back to BCUT=6. Perhaps I fixed
a 10 year old problem!

However, there are other items I would like to check,
but are beyond my capability, such as SPIX service item
which requires a scope and the G2 adjustment (although I think
it's very close)

How can I find someone who could do this for me?
I'm in Los Angeles.
Any info appreciated.

Dave
 
J

Jerry G.

Jan 1, 1970
0
Look up Sony in the phone book, or go to their web page, and find out how to
get in touch with them to find someone qualified to do the proper service on
your set. I am sure that there are independent shops in your area that can
also do this, but you want to have one that the tech is really familiar with
your set, and does not just want your business.

Considering the age of the set, if the set was used every day, I would be
very surprised if the CRT is still in very good condition.

--

Jerry G.
======


When I first got my 27 inch XBR in 1992, the
settings for color were GCUT=6 and BCUT=6.

During the big Los Angeles quake of 1994,
the TV experienced a severe shaking. The TV
seemed to work fine, save for the fact that
the picture was more blue than before, so I set
BCUT=2, and I've been using it that way till now.
I surmised at the time that something must have worked loose
and there was probably a cold solder joint somewhere.

During my recent experience with complete picture failure
and my subsequent soldering on the A and CRT board,
besides the restoration to normal operation, the Blue color
was now noticeably "low". Imagine my surprise
when normal blue (at least to my eyes) was restored
when the setting was put back to BCUT=6. Perhaps I fixed
a 10 year old problem!

However, there are other items I would like to check,
but are beyond my capability, such as SPIX service item
which requires a scope and the G2 adjustment (although I think
it's very close)

How can I find someone who could do this for me?
I'm in Los Angeles.
Any info appreciated.

Dave
 
D

davexnet02

Jan 1, 1970
0
Look up Sony in the phone book, or go to their web page, and find out how to
get in touch with them to find someone qualified to do the proper service on
your set. I am sure that there are independent shops in your area that can
also do this, but you want to have one that the tech is really familiar with
your set, and does not just want your business.

Considering the age of the set, if the set was used every day, I would be
very surprised if the CRT is still in very good condition.
Well this is the thing. I already spend $290 getting the power supply
fixed, it doesn't seem wise to spend anymore on such an old set.

This is the sequence of events:
1992 to Sept 2004 more or less trouble free.
Sept 2004 power supply broke/fixed by Sony Tech/set returned to me.
Setp 2004 to Dec 2004 TV working, but unusual CRT color shifts.
Dec 15 2004 no picture/Black screen/sound only
Dec 25 2004 TV restored after soldering on A and CRT boards.

Whether the tube is good or not, I'm not sure.
If you'd asked me before the power supply went bad, I'd have said a
definite yes. After the fix, the picture behaved in a manner that I'd
never seen before, and it was that way until it failed completely,
about 3 months later. During that 3 months, the tube looked like it
was under stress, color shifts during extended high contrast scenes -
which eventually would return to normal after a couple of hours.
I tried to mitigate it by turning down brightness and
contrast. It was getting lower and lower as time progressed.

But since I did my recent fix on Dec 25, the whole thing is more
stable. The colors/brightness/contrast are better balanced. I
don't see evidence of the CRT straining like I did.
Now, whether some damage *was* done, who knows?

I found a post by Louis Carliner who mentions that
a good setup can be made by using "Video Essentials".
http://groups-beta.google.com/group/rec.video/msg/1e9141f3379aa3ae?dmode=source
perhaps I'll track down a copy.

To be honest, I'm just pleased I got it back to as good as I did,
apparently as much by luck than anything else!
Regards,
Dave
 
J

James Sweet

Jan 1, 1970
0
davexnet02 said:
Well this is the thing. I already spend $290 getting the power supply
fixed, it doesn't seem wise to spend anymore on such an old set.


But then again is it wise to throw away the $290 you already spent by not
having the current problem fixed? It's hard to say.
 
K

Ken G.

Jan 1, 1970
0
Good greeef ... throw it away and buy a flat screen lcd set .

I have an older RCA set i think a 92 vintage and it still has a better
picture than most new sets as for small image and print focus but the
new LCD set blows it away :)
 
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