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Home > Archive > Electronics repair > April 2005 > Samsung TV TXE2545 Bottom Half of Picture
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Samsung TV TXE2545 Bottom Half of Picture
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| Hi,
I have a Samsung TV TXE2545 mfg 4/97 in my shop with
half a picture (bottom half) which is linear (normal). At the center (top of
half of picture) is a bright horizontal line. Above, the screen is black.
I scoped the input signal (pin 1) to IC301 TDA8350Q and it looks normal.
Pins 4 and 8 have a little above normal voltage. Could the cause
of this problem be IC301?
Thanks in advance, Brad
Before you type your password, credit card number, etc.,
be sure there is no active key logger (spyware) in your PC.
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| Change the 8350Q and the 3 filters that are close by.
Samsung has a Kit out for that set....
kip
"Brad" <bpetria@verizon.net> wrote in message
news:425bdc2c.766917@news.bellatlantic.net...
quote:
> Hi,
>
> I have a Samsung TV TXE2545 mfg 4/97 in my shop with
> half a picture (bottom half) which is linear (normal). At the center (top
> of
> half of picture) is a bright horizontal line. Above, the screen is black.
> I scoped the input signal (pin 1) to IC301 TDA8350Q and it looks normal.
> Pins 4 and 8 have a little above normal voltage. Could the cause
> of this problem be IC301?
>
> Thanks in advance, Brad
>
> Before you type your password, credit card number, etc.,
> be sure there is no active key logger (spyware) in your PC.
>
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| RonKZ650 2005-04-16, 3:16 pm |
| Normally don't even have bad caps, just the IC. Be sure to resolder any
bad connections around the area, mostly on the resistors that mount
vertically.
kip wrote:[vbcol=seagreen]
> Change the 8350Q and the 3 filters that are close by.
> Samsung has a Kit out for that set....
> kip
> "Brad" <bpetria@verizon.net> wrote in message
> news:425bdc2c.766917@news.bellatlantic.net...
center (top[vbcol=seagreen]
black.[vbcol=seagreen]
normal.[vbcol=seagreen]
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| I Had one last week with a bad Bi Polar ..the Orange one in front of the IC.
kip
"RonKZ650" <RonKZ650@aol.com> wrote in message
news:1113324660.255871.297330@z14g2000cwz.googlegroups.com...
quote:
> Normally don't even have bad caps, just the IC. Be sure to resolder any
> bad connections around the area, mostly on the resistors that mount
> vertically.
> kip wrote:
> center (top
> black.
> normal.
>
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| Tom MacIntyre 2005-04-16, 3:16 pm |
| On Tue, 12 Apr 2005 14:37:12 GMT, bpetria@verizon.net (Brad) wrote:
quote:
>Hi,
>
> I have a Samsung TV TXE2545 mfg 4/97 in my shop with
>half a picture (bottom half) which is linear (normal). At the center (top of
>half of picture) is a bright horizontal line. Above, the screen is black.
>I scoped the input signal (pin 1) to IC301 TDA8350Q and it looks normal.
>Pins 4 and 8 have a little above normal voltage. Could the cause
>of this problem be IC301?
>
> Thanks in advance, Brad
Vertical IC, but there is an upgrade for those sets also. They
(Samsung) recommend adding some components to the vertical section
(zeners and ceramic capacitors, I think) to stabilize the circuit.
Someone may have that information available.
They run as hot as a firebrand, or at least did when I worked on
them.
Tom
quote:
>
> Before you type your password, credit card number, etc.,
> be sure there is no active key logger (spyware) in your PC.
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| Tom ! They still Run Hot Hot..
kip
"Tom MacIntyre" <tom__macintyre@hotmail.com> wrote in message
news:5ebo519qeuqkcjllkd7t5jm96s8f0626ur@4ax.com...
quote:
> On Tue, 12 Apr 2005 14:37:12 GMT, bpetria@verizon.net (Brad) wrote:
>
>
> Vertical IC, but there is an upgrade for those sets also. They
> (Samsung) recommend adding some components to the vertical section
> (zeners and ceramic capacitors, I think) to stabilize the circuit.
> Someone may have that information available.
>
> They run as hot as a firebrand, or at least did when I worked on
> them.
>
> Tom
>
>
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| Tom MacIntyre 2005-04-16, 3:16 pm |
| On Tue, 12 Apr 2005 17:20:17 -0400, "kip" <kip@our.ca> wrote:
quote:
>Tom ! They still Run Hot Hot..
>
>kip
55-60 degrees C on the heatsink, if memory serves. Maybe a Peletier
cooler is in order for them. :-)
Tom
quote:
>"Tom MacIntyre" <tom__macintyre@hotmail.com> wrote in message
>news:5ebo519qeuqkcjllkd7t5jm96s8f0626ur@4ax.com...
>
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| Jason D. 2005-04-16, 3:16 pm |
| On Tue, 12 Apr 2005 20:25:14 GMT, Tom MacIntyre
<tom__macintyre@hotmail.com> wrote:
quote:
>On Tue, 12 Apr 2005 14:37:12 GMT, bpetria@verizon.net (Brad) wrote:
>
>
>Vertical IC, but there is an upgrade for those sets also. They
>(Samsung) recommend adding some components to the vertical section
>(zeners and ceramic capacitors, I think) to stabilize the circuit.
Hmmm, that bugger runs real HOT. Change all 3 caps for that vertical
circuit and the IC. This one uses dual voltage design, one positive,
one negative.
Yes there is Samsung's bulletin on that design.
Cheers,
Wizard
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