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

L

Lenny

Guest
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" <captainvideo462002@yahoo.com> wrote in message
news:d980bc2c.0403020612.69d81e33@posting.google.com...
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.
Click to expand...
 
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" <va3mmTAKEOUTTHIS@niagara.com> wrote in message
news:newscache$ixkyth$cko$1@newsfeed.niagara.com...
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" <captainvideo462002@yahoo.com> wrote in message
news:d980bc2c.0403020612.69d81e33@posting.google.com...
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.
Click to expand...
 
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" <ronkz650@aol.comnospam> wrote in message
news:20040302164412.25780.00000736@mb-m01.aol.com...
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
Click to expand...
 
RonKZ650:

I think we will all be interested in your future posting with the comparison
testing results.
Click to expand...
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" <sofie@olypen.com> wrote in message news:<104a5se122prk6f@corp.supernews.com>...
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" <ronkz650@aol.comnospam> wrote in message
news:20040302164412.25780.00000736@mb-m01.aol.com...
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
Click to expand...
 
If you are going to make comparisons, why not compare the generic vs the RCA
in the same version of the chip?

Leonard

"RonKZ650" <ronkz650@aol.comnospam> wrote in message
news:20040302205853.20488.00000714@mb-m28.aol.com...
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
Click to expand...
 
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.

timfromsirius@hotmail.com (Tim Marcus) wrote in message news:<a3a12184.0403022031.63d4354b@posting.google.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" <sofie@olypen.com> wrote in message news:<104a5se122prk6f@corp.supernews.com>...
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" <ronkz650@aol.comnospam> wrote in message
news:20040302164412.25780.00000736@mb-m01.aol.com...
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
Click to expand...
 
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" <captainvideo462002@yahoo.com> wrote in message
news:d980bc2c.0403030631.6bde7b8b@posting.google.com...
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.

timfromsirius@hotmail.com (Tim Marcus) wrote in message
news:<a3a12184.0403022031.63d4354b@posting.google.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" <sofie@olypen.com> wrote in message
news:<104a5se122prk6f@corp.supernews.com>...
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" <ronkz650@aol.comnospam> wrote in message
news:20040302164412.25780.00000736@mb-m01.aol.com...
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
Click to expand...
 
No! Different alltogether but you could
look for bad solder connections first.
Then trouble shoot the power sections.

kpi
"TKL" <kunlong@singnet.com.sg> wrote in message
news:c253pb$iol$1@reader01.singnet.com.sg...
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" <captainvideo462002@yahoo.com> wrote in message
news:d980bc2c.0403030631.6bde7b8b@posting.google.com...
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.

timfromsirius@hotmail.com (Tim Marcus) wrote in message
news:<a3a12184.0403022031.63d4354b@posting.google.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" <sofie@olypen.com> wrote in message
news:<104a5se122prk6f@corp.supernews.com>...
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" <ronkz650@aol.comnospam> wrote in message
news:20040302164412.25780.00000736@mb-m01.aol.com...
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
Click to expand...
 
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