Sony KV-27FS16 (Chassis BA5)

[Mike S]

Hello Group,
After 8 1/2 years my Sony Wega went dead yesterday. I opened it and all I
could find was the 6.3A main fuse open, not burned, just open.
I checked some of the major semis then replaced the fuse and powered it on.
The TV seems flawless.
My question: Is it advisable to ESR and/or replace all the power supply
caps, resolder the horizontal drive and any other suspect points to give the
set a longer life?
The CRT is still in excellent shape - starts up in about 5 seconds.
I figure if I replace all the old caps now and resolder the most common
problematic spots, it could prevent some lengthy troubleshooting and
replacement of expensive semis and give the TV another 5 years of life.
Although it is an analog TV it is connected to a cable box with analog video
outputs so the older technology doesn't bother me for now if it saves me
some cash for the next few years.
What do other group members think? Thank you in advance for your opinions.
-Mike in NJ (TV tech in several shops in Brooklyn and Staten Island until
they could no longer stay afloat)

 

[Mark D. Zacharias]

"Mike S" <nospam> wrote in message news:490d0146$0$4974$607ed4bc@cv.net...

Hello Group,
After 8 1/2 years my Sony Wega went dead yesterday. I opened it and all I
could find was the 6.3A main fuse open, not burned, just open.
I checked some of the major semis then replaced the fuse and powered it
on. The TV seems flawless.
My question: Is it advisable to ESR and/or replace all the power supply
caps, resolder the horizontal drive and any other suspect points to give
the set a longer life?
The CRT is still in excellent shape - starts up in about 5 seconds.
I figure if I replace all the old caps now and resolder the most common
problematic spots, it could prevent some lengthy troubleshooting and
replacement of expensive semis and give the TV another 5 years of life.
Although it is an analog TV it is connected to a cable box with analog
video outputs so the older technology doesn't bother me for now if it
saves me some cash for the next few years.
What do other group members think? Thank you in advance for your
opinions.
-Mike in NJ (TV tech in several shops in Brooklyn and Staten Island until
they could no longer stay afloat)

Sony's usually don't have too many cap problems, so my advice would be just
replace the fuse, inspect, resolder the horizontal drive transformer and
vertical output IC, and be done with it. Replacing numerous caps could
invite other problems not foreseen. Just as an example, one of the new caps
you use could be inferior in ESR characteristics and make another part run
too hot.


Mark Z.

 

[Mike S]

"Mark D. Zacharias" <nonsense@nonsense.net> wrote in message
news:2VhPk.2734$8_3.1150@flpi147.ffdc.sbc.com...

"Mike S" <nospam> wrote in message news:490d0146$0$4974$607ed4bc@cv.net...
Hello Group,
After 8 1/2 years my Sony Wega went dead yesterday. I opened it and all
I could find was the 6.3A main fuse open, not burned, just open.
I checked some of the major semis then replaced the fuse and powered it
on. The TV seems flawless.
My question: Is it advisable to ESR and/or replace all the power supply
caps, resolder the horizontal drive and any other suspect points to give
the set a longer life?
The CRT is still in excellent shape - starts up in about 5 seconds.
I figure if I replace all the old caps now and resolder the most common
problematic spots, it could prevent some lengthy troubleshooting and
replacement of expensive semis and give the TV another 5 years of life.
Although it is an analog TV it is connected to a cable box with analog
video outputs so the older technology doesn't bother me for now if it
saves me some cash for the next few years.
What do other group members think? Thank you in advance for your
opinions.
-Mike in NJ (TV tech in several shops in Brooklyn and Staten Island until
they could no longer stay afloat)




Sony's usually don't have too many cap problems, so my advice would be
just replace the fuse, inspect, resolder the horizontal drive transformer
and vertical output IC, and be done with it. Replacing numerous caps could
invite other problems not foreseen. Just as an example, one of the new
caps you use could be inferior in ESR characteristics and make another
part run too hot.


Mark Z.
Thank you, Mark, for your input. That sounds like a plan.

Mike