Sony KV-27EXR25 just clicks, (STRS6301 to "A" or not to "A")

This set clicks, the degausing coil energizes and thats all. Almost
every solder joint on the power supply board was cold. The Hor out in
circuit does not look shorted. I repaired the solder and the set is
still dead. There is an STRS6301 on the power supply board. I have
seen a few of these bad over the years and usually just replacing them
restores proper operation. However lately I've been reading about the
"A" version of this chip as being improved or better. Then again in
some forums it seems that its not recommended to replace an original
with an "A". Does anyone have any further insight on this? Also not
having a schematic, does anyone have a straight forward
troubleshooting procedure for this chassis or perhaps a published tip
on it that they could possibly share with me? Thanks very much for any
assistance you may be able to offer. Lenny Stein, Barlen Electronics.

Lenny !
Reflow all solder connections on that Module
also ESR all the caps especially thosw close to
the Heat sink.I have always used the STRS6301A
with 100 percent success.

kip

--
"Watch the return E-Mail addy its false"
"Lenny" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed) om...
> This set clicks, the degausing coil energizes and thats all. Almost
> every solder joint on the power supply board was cold. The Hor out in
> circuit does not look shorted. I repaired the solder and the set is
> still dead. There is an STRS6301 on the power supply board. I have
> seen a few of these bad over the years and usually just replacing them
> restores proper operation. However lately I've been reading about the
> "A" version of this chip as being improved or better. Then again in
> some forums it seems that its not recommended to replace an original
> with an "A". Does anyone have any further insight on this? Also not
> having a schematic, does anyone have a straight forward
> troubleshooting procedure for this chassis or perhaps a published tip
> on it that they could possibly share with me? Thanks very much for any
> assistance you may be able to offer. Lenny Stein, Barlen Electronics.

Lenny:
The reply by John/Kip is absolutely correct about the "A" version of the
chip...... 100% success.....
.....and be absolutely certain to ESR check all the electrolytics on the
power supply board.... check and reflow any and all questionable solder
joints.... especially near and around the high heat producing parts like
power resistors, diodes, chips, etc...... AND also on the main pcb look
for bad solder joints on the flyback and HOT and the power resistors,
especially near and around the flyback derived B+ circuitry and the main B+
distribution paths.
--
Best Regards,
Daniel Sofie
Electronics Supply & Repair
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -


"john" <(E-Mail Removed)> wrote in message
news:newscache$ixkyth$cko$(E-Mail Removed).. .
> Lenny !
> Reflow all solder connections on that Module
> also ESR all the caps especially thosw close to
> the Heat sink.I have always used the STRS6301A
> with 100 percent success.
>
> kip
>
> --
> "Watch the return E-Mail addy its false"
> "Lenny" <(E-Mail Removed)> wrote in message
> news:(E-Mail Removed) om...
> > This set clicks, the degausing coil energizes and thats all. Almost
> > every solder joint on the power supply board was cold. The Hor out in
> > circuit does not look shorted. I repaired the solder and the set is
> > still dead. There is an STRS6301 on the power supply board. I have
> > seen a few of these bad over the years and usually just replacing them
> > restores proper operation. However lately I've been reading about the
> > "A" version of this chip as being improved or better. Then again in
> > some forums it seems that its not recommended to replace an original
> > with an "A". Does anyone have any further insight on this? Also not
> > having a schematic, does anyone have a straight forward
> > troubleshooting procedure for this chassis or perhaps a published tip
> > on it that they could possibly share with me? Thanks very much for any
> > assistance you may be able to offer. Lenny Stein, Barlen Electronics.
>
>

Yes, but is there a difference in the "Sony A" for $30 or the "generic A" for
$7? I'm going to find out next Sony I work on. The last 2 generics I replaced
were running over 160 degrees F. I think that's really too hot. I'm anxious to
compare the original Sony. Sony still sells both the STRS6301 and 6301A as a
different part number.
Ron

RonKZ650:

I think we will all be interested in your future posting with the comparison
testing results.

"Running too hot" has NEVER been an issue with the $7 "generic" or rather,
after market replacements I get from my jobber. 100% OK.

The markings on the replacement chips that I have always obtained from my
jobber @ $7 appear to be the same as the more expensive Sony supplied
chips.... it looks to me like the SAME manufacturer and almost definitely
NOT some cheapo Hong Kong, inferior, rip-off.with obvious cosmetic
challenges that we are all familiar with.
--
Best Regards,
Daniel Sofie
Electronics Supply & Repair
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -


"RonKZ650" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> Yes, but is there a difference in the "Sony A" for $30 or the "generic A"
for
> $7? I'm going to find out next Sony I work on. The last 2 generics I
replaced
> were running over 160 degrees F. I think that's really too hot. I'm
anxious to
> compare the original Sony. Sony still sells both the STRS6301 and 6301A as
a
> different part number.
> Ron

>RonKZ650:
>
>I think we will all be interested in your future posting with the comparison
>testing results.
>

I meant to also mention I did the test on RCA STR730 series regulator ICs last
month. On same set, same meter setup, the original RCA STK 730-030 ran 5
degrees cooler at peak, then a generic STK730-150. It also drew less current at
standby, less at normal on conditions, as well as regulating a dead on 140v
where the generic was close to 142v.
I'll post the STRS6301 results soon.
Ron

TELEVISION*
SONY*
KV27EXR25*
DEAD?CLICKING NOISE, B TOO HIGH*
CHECK R673 4.7 FOR OPEN*

TELEVISION*
SONY*
KV27EXR25*
DEAD, CLICKS, SWITCHING XFMR HAS NO POWER OUT-BOARD G*
REPLACE IC651 STRS6301, R656 560, Q611 2SC3311A*

I have repaired several of these - first I swap out the str regulator,
which is almost always bad. Then take care of the cold joints. If that
does not do it one of these 2 tips probably will. best of luck - Tim

"Sofie" <(E-Mail Removed)> wrote in message news:<(E-Mail Removed)>...
> RonKZ650:
>
> I think we will all be interested in your future posting with the comparison
> testing results.
>
> "Running too hot" has NEVER been an issue with the $7 "generic" or rather,
> after market replacements I get from my jobber. 100% OK.
>
> The markings on the replacement chips that I have always obtained from my
> jobber @ $7 appear to be the same as the more expensive Sony supplied
> chips.... it looks to me like the SAME manufacturer and almost definitely
> NOT some cheapo Hong Kong, inferior, rip-off.with obvious cosmetic
> challenges that we are all familiar with.
> --
> Best Regards,
> Daniel Sofie
> Electronics Supply & Repair
> - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
>
>
> "RonKZ650" <(E-Mail Removed)> wrote in message
> news:(E-Mail Removed)...
> > Yes, but is there a difference in the "Sony A" for $30 or the "generic A"
> for
> > $7? I'm going to find out next Sony I work on. The last 2 generics I
> replaced
> > were running over 160 degrees F. I think that's really too hot. I'm
> anxious to
> > compare the original Sony. Sony still sells both the STRS6301 and 6301A as
> a
> > different part number.
> > Ron

If you are going to make comparisons, why not compare the generic vs the RCA
in the same version of the chip?

Leonard

"RonKZ650" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> >RonKZ650:
> >
> >I think we will all be interested in your future posting with the
comparison
> >testing results.
> >
>
> I meant to also mention I did the test on RCA STR730 series regulator ICs
last
> month. On same set, same meter setup, the original RCA STK 730-030 ran 5
> degrees cooler at peak, then a generic STK730-150. It also drew less
current at
> standby, less at normal on conditions, as well as regulating a dead on
140v
> where the generic was close to 142v.
> I'll post the STRS6301 results soon.
> Ron

Thanks to everyone for the advice. I'm ordering the A version today
and then I'll dive back in. Best regards, Lenny Stein, Barlen
Electronics.

(E-Mail Removed) (Tim Marcus) wrote in message news:<(E-Mail Removed). com>...
> TELEVISION
> SONY
> KV27EXR25
> DEAD?CLICKING NOISE, B TOO HIGH
> CHECK R673 4.7 FOR OPEN
>
> TELEVISION
> SONY
> KV27EXR25
> DEAD, CLICKS, SWITCHING XFMR HAS NO POWER OUT-BOARD G
> REPLACE IC651 STRS6301, R656 560, Q611 2SC3311A
>
> I have repaired several of these - first I swap out the str regulator,
> which is almost always bad. Then take care of the cold joints. If that
> does not do it one of these 2 tips probably will. best of luck - Tim
>
> "Sofie" <(E-Mail Removed)> wrote in message news:<(E-Mail Removed)>...
> > RonKZ650:
> >
> > I think we will all be interested in your future posting with the comparison
> > testing results.
> >
> > "Running too hot" has NEVER been an issue with the $7 "generic" or rather,
> > after market replacements I get from my jobber. 100% OK.
> >
> > The markings on the replacement chips that I have always obtained from my
> > jobber @ $7 appear to be the same as the more expensive Sony supplied
> > chips.... it looks to me like the SAME manufacturer and almost definitely
> > NOT some cheapo Hong Kong, inferior, rip-off.with obvious cosmetic
> > challenges that we are all familiar with.
> > --
> > Best Regards,
> > Daniel Sofie
> > Electronics Supply & Repair
> > - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
> >
> >
> > "RonKZ650" <(E-Mail Removed)> wrote in message
> > news:(E-Mail Removed)...
> > > Yes, but is there a difference in the "Sony A" for $30 or the "generic A"
> for
> > > $7? I'm going to find out next Sony I work on. The last 2 generics I
> replaced
> > > were running over 160 degrees F. I think that's really too hot. I'm
> anxious to
> > > compare the original Sony. Sony still sells both the STRS6301 and 6301A as
> a
> > > different part number.
> > > Ron

My set KV34MN11 also have same CLICKing problem, no screen & sound when
power on. Can i try the same solution? Pls help, thks in advance.


Lenny" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed) om...
> Thanks to everyone for the advice. I'm ordering the A version today
> and then I'll dive back in. Best regards, Lenny Stein, Barlen
> Electronics.
>
> (E-Mail Removed) (Tim Marcus) wrote in message
news:<(E-Mail Removed). com>...
> > TELEVISION
> > SONY
> > KV27EXR25
> > DEAD?CLICKING NOISE, B TOO HIGH
> > CHECK R673 4.7 FOR OPEN
> >
> > TELEVISION
> > SONY
> > KV27EXR25
> > DEAD, CLICKS, SWITCHING XFMR HAS NO POWER OUT-BOARD G
> > REPLACE IC651 STRS6301, R656 560, Q611 2SC3311A
> >
> > I have repaired several of these - first I swap out the str regulator,
> > which is almost always bad. Then take care of the cold joints. If that
> > does not do it one of these 2 tips probably will. best of luck - Tim
> >
> > "Sofie" <(E-Mail Removed)> wrote in message
news:<(E-Mail Removed)>...
> > > RonKZ650:
> > >
> > > I think we will all be interested in your future posting with the
comparison
> > > testing results.
> > >
> > > "Running too hot" has NEVER been an issue with the $7 "generic" or
rather,
> > > after market replacements I get from my jobber. 100% OK.
> > >
> > > The markings on the replacement chips that I have always obtained from
my
> > > jobber @ $7 appear to be the same as the more expensive Sony supplied
> > > chips.... it looks to me like the SAME manufacturer and almost
definitely
> > > NOT some cheapo Hong Kong, inferior, rip-off.with obvious cosmetic
> > > challenges that we are all familiar with.
> > > --
> > > Best Regards,
> > > Daniel Sofie
> > > Electronics Supply & Repair
> >
> - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
> > >
> > >
> > > "RonKZ650" <(E-Mail Removed)> wrote in message
> > > news:(E-Mail Removed)...
> > > > Yes, but is there a difference in the "Sony A" for $30 or the
"generic A"
> > for
> > > > $7? I'm going to find out next Sony I work on. The last 2 generics I
> > replaced
> > > > were running over 160 degrees F. I think that's really too hot. I'm
> > anxious to
> > > > compare the original Sony. Sony still sells both the STRS6301 and
6301A as
> > a
> > > > different part number.
> > > > Ron