- Is freeze spray so dangerous (it goes to -19 ºC, and the IC is specified to -40 ºC)?. I have used it many times without damages.
I'm repairing a friend's Sony Bravia (KDL-37V5500). The first minute
after powering up the image is OK, but after the first minute the image
gets solarized (whites go saturated, some parts become yellow, there is
a faint red border around bright parts).
The power supply and the backlight look OK, so I suspected about the
T-CON and used freeze spray over it. No changes until the local power
supply IC (ROHM BD8160EFV) died in short.
A new IC is on the way, but I have two questions:
- Where is the original fault?
- Is freeze spray so dangerous (it goes to -19 ºC, and the IC is
specified to -40 ºC)?. I have used it many times without damages.
TIA
--
Saludos
Miguel Giménez
On Wednesday, August 11, 2021 at 6:35:38 AM UTC-4, Miguel Giménez wrote:chipquik on the IC, if it floats off the board, replace with a plastic version. If it won't budge, break out the hot air to flow the solder under the chip. Replace with a metal back version.
I'm repairing a friend's Sony Bravia (KDL-37V5500). The first minute
after powering up the image is OK, but after the first minute the image
gets solarized (whites go saturated, some parts become yellow, there is
a faint red border around bright parts).
The power supply and the backlight look OK, so I suspected about the
T-CON and used freeze spray over it. No changes until the local power
supply IC (ROHM BD8160EFV) died in short.
A new IC is on the way, but I have two questions:
- Where is the original fault?
- Is freeze spray so dangerous (it goes to -19 ºC, and the IC is
specified to -40 ºC)?. I have used it many times without damages.
TIA
--
Saludos
Miguel Giménez
Your original fault is most like the AS15 IC. There are several variants and some of them are all plastic while some have a metal belly pan for ground and heatsink. If yours has the belly pan, you must use hot air to get it out. What I do is put
As to why the other IC failed, are you sure it shorted? If the AS chip shorts, it will put the power converter IC into shutdown. Try removing the AS15 and see if the power IC outputs properly with no load.
El 11/08/2021 a las 17:31, ohg...@gmail.com escribió:chipquik on the IC, if it floats off the board, replace with a plastic version. If it won't budge, break out the hot air to flow the solder under the chip. Replace with a metal back version.
On Wednesday, August 11, 2021 at 6:35:38 AM UTC-4, Miguel Giménez wrote:
I'm repairing a friend's Sony Bravia (KDL-37V5500). The first minute
after powering up the image is OK, but after the first minute the image >> gets solarized (whites go saturated, some parts become yellow, there is >> a faint red border around bright parts).
The power supply and the backlight look OK, so I suspected about the
T-CON and used freeze spray over it. No changes until the local power
supply IC (ROHM BD8160EFV) died in short.
A new IC is on the way, but I have two questions:
- Where is the original fault?
- Is freeze spray so dangerous (it goes to -19 ºC, and the IC is
specified to -40 ºC)?. I have used it many times without damages.
TIA
--
Saludos
Miguel Giménez
Your original fault is most like the AS15 IC. There are several variants and some of them are all plastic while some have a metal belly pan for ground and heatsink. If yours has the belly pan, you must use hot air to get it out. What I do is put
As to why the other IC failed, are you sure it shorted? If the AS chip shorts, it will put the power converter IC into shutdown. Try removing the AS15 and see if the power IC outputs properly with no load.
Thank you both for your answers.
I have a SMT air station for chip removal, and the IC has a bottom pad
for heat sinking. I will desolder it when the replacement arrive.
Soldering the bottom pad will be difficult, though.
The BD8160 has the inner boost FET shorted (pins 4 and 5 are shorted to ground), so the 12 V input is shorted to ground through the boost coil. There is a 1206 fuse, but it is OK.
The AS15 is after the boost diode and a series MOSFET switch, so I know
the short is not in it (I have the T-CON schematic). If the board comes
back to life I will check the AS15, it is easy to test because it is
just an array of analog buffers.
--
Saludos
Miguel Giménez
You have a schematic for the TCON???
El 13/08/2021 a las 19:49, ohg...@gmail.com escribió:
You have a schematic for the TCON???Yes. The TV set is Sony, but this particular TCON is made by Samsung,
and the schematic was easy to find (IIRC it is from Elektrotanya)
--
Saludos
Miguel Giménez
Sony never made an LCD screen for TVs as far as I've ever seen.
On Tue, 17 Aug 2021 06:48:18 -0700 (PDT), "ohg...@gmail.com" <ohg...@gmail.com> wrote:________
Sony never made an LCD screen for TVs as far as I've ever seen.True. Not for consumer TV's. The Sony, Hitachi and Toshiba LCD panel divisions, were merged into Japan Display in 2011: <https://www.j-display.com/english/>
The industrical displays are sold under the KOE name: <http://www.koe.j-display.com> <http://www.koe.j-display.com/index.php?option=newproduct&task=showpage&id=43>
Japan Display makes smartphone, tablet, laptop and medical LCD
displays but no consumer TV displays.
--
Jeff Liebermann je...@cruzio.com
PO Box 272 http://www.LearnByDestroying.com
Ben Lomond CA 95005-0272
Skype: JeffLiebermann AE6KS 831-336-2558
I have an interesting question for all of you:
What do you think of the quality/characteristics of the picture
you see on new TVs on display in stores?
On Tuesday, August 17, 2021 at 12:14:29 PM UTC-4, Jeff Liebermann wrote:
On Tue, 17 Aug 2021 06:48:18 -0700 (PDT), "ohg...@gmail.com" <ohg...@gmail.com> wrote:
Sony never made an LCD screen for TVs as far as I've ever seen.True. Not for consumer TV's. The Sony, Hitachi and Toshiba LCD panel divisions, were merged into Japan Display in 2011: <https://www.j-display.com/english/>
The industrical displays are sold under the KOE name: <http://www.koe.j-display.com> <http://www.koe.j-display.com/index.php?option=newproduct&task=showpage&id=43>
Japan Display makes smartphone, tablet, laptop and medical LCD
displays but no consumer TV displays.
--________
Jeff Liebermann je...@cruzio.com
PO Box 272 http://www.LearnByDestroying.com
Ben Lomond CA 95005-0272
Skype: JeffLiebermann AE6KS 831-336-2558
I have an interesting question for all of you:
What do you think of the quality/characteristics of the picture
you see on new TVs on display in stores?
On Sunday, August 22, 2021 at 7:12:36 AM UTC-4, Chris K-Man wrote:overly bright. One of the guys was impressed with that mess of a picture and asked if I could adjust his Sony to look like that. I said I could try, but wasn't sure if I could get his Sony to look that bad on purpose. He of course was shocked but when I
On Tuesday, August 17, 2021 at 12:14:29 PM UTC-4, Jeff Liebermann wrote:
On Tue, 17 Aug 2021 06:48:18 -0700 (PDT), "ohg...@gmail.com" <ohg...@gmail.com> wrote:
Sony never made an LCD screen for TVs as far as I've ever seen.True. Not for consumer TV's. The Sony, Hitachi and Toshiba LCD panel divisions, were merged into Japan Display in 2011: <https://www.j-display.com/english/>
The industrical displays are sold under the KOE name: <http://www.koe.j-display.com> <http://www.koe.j-display.com/index.php?option=newproduct&task=showpage&id=43>
Japan Display makes smartphone, tablet, laptop and medical LCD
displays but no consumer TV displays.
--________
Jeff Liebermann je...@cruzio.com
PO Box 272 http://www.LearnByDestroying.com
Ben Lomond CA 95005-0272
Skype: JeffLiebermann AE6KS 831-336-2558
I have an interesting question for all of you:
What do you think of the quality/characteristics of the pictureThey're cartoonishly inaccurate - but intentionally so. When there are 50 displays on the wall all running at the same time, the one with most bizarre colors and brightness is the one most people will pick as the best picture.
you see on new TVs on display in stores?
When setting up a new TV for home, most have a "home" or "store" or "demo" option. The home setting sets the LED array brightness to 100% by default. The store or demo mode sets it for 110 plus percent for the same reason.
I remember the time my softball team was at a bar after a game, and they had a Sharp Aquos 60" in default settings. The grass on the infield of the game we were watching that was on was a weird fluorescent green, the blacks were dark blue, and it was
Good call -Someone finally bit at your troll bait. You must be so prou
So how can I, among many people, help turn the tide against
public acceptance of such a garish factory image - be it Home or
Store mode?
How to educate them otherwise?
On Wed, 25 Aug 2021 12:09:38 -0700, thekma # shortbus.edu
Good call -Someone finally bit at your troll bait. You must be so prou
So how can I, among many people, help turn the tide againstMaybe by obsessive trolling on Usenet, getting maybe a single hit every three or four years? That's not a smart way to achieve your goal, but
public acceptance of such a garish factory image - be it Home or
Store mode?
you're not a very smart retard.
How to educate them otherwise?Definitely by ko0k-dansing on a usenet hobby horse. Yeah, that's the
ticket! That's the way to reach the masses! At least usenet trolling won't get you kicked out of restaurants and TV stores for being an obsessive douche bag.
overly bright. One of the guys was impressed with that mess of a picture and asked if I could adjust his Sony to look like that. I said I could try, but wasn't sure if I could get his Sony to look that bad on purpose. He of course was shocked but when II have an interesting question for all of you:
What do you think of the quality/characteristics of the pictureThey're cartoonishly inaccurate - but intentionally so. When there are 50 displays on the wall all running at the same time, the one with most bizarre colors and brightness is the one most people will pick as the best picture.
you see on new TVs on display in stores?
When setting up a new TV for home, most have a "home" or "store" or "demo" option. The home setting sets the LED array brightness to 100% by default. The store or demo mode sets it for 110 plus percent for the same reason.
I remember the time my softball team was at a bar after a game, and they had a Sharp Aquos 60" in default settings. The grass on the infield of the game we were watching that was on was a weird fluorescent green, the blacks were dark blue, and it was
_______
Good call - with the grass that is!
So how can I, among many people, help turn the tide against public acceptance of such a garish factory image - be it Home or Store mode?
I would estimate, since the mid-2000s, that millions of consumers automatically associate such overblown settings with HD and or 4K.
How to educate them otherwise?
On Wednesday, August 25, 2021 at 3:09:41 PM UTC-4, Chris K-Man wrote:
was overly bright. One of the guys was impressed with that mess of a picture and asked if I could adjust his Sony to look like that. I said I could try, but wasn't sure if I could get his Sony to look that bad on purpose. He of course was shocked butI have an interesting question for all of you:
What do you think of the quality/characteristics of the pictureThey're cartoonishly inaccurate - but intentionally so. When there are 50 displays on the wall all running at the same time, the one with most bizarre colors and brightness is the one most people will pick as the best picture.
you see on new TVs on display in stores?
When setting up a new TV for home, most have a "home" or "store" or "demo" option. The home setting sets the LED array brightness to 100% by default. The store or demo mode sets it for 110 plus percent for the same reason.
I remember the time my softball team was at a bar after a game, and they had a Sharp Aquos 60" in default settings. The grass on the infield of the game we were watching that was on was a weird fluorescent green, the blacks were dark blue, and it
__________________
Good call - with the grass that is!
So how can I, among many people, help turn the tide against public acceptance of such a garish factory image - be it Home or Store mode?
I would estimate, since the mid-2000s, that millions of consumers automatically associate such overblown settings with HD and or 4K.Why? They're happy with those crappy settings. Ignorance
How to educate them otherwise?
is bliss - let them be I say. Those settings are hard for me to
watch, but I don't think anyone who likes cartoonishly bad video
would listen to me, you, or anyone anyway. It was the same
with the "sizzle and boom" smiley face audio graphic equalizer
settings.
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