Samsung TV TXE2545 Bottom Half of Picture

Apr 12, 2005 7 Replies
B

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.



Vote
Twitter Facebook LinkedIn
R

center (top

black.

normal.

Vote
Twitter Facebook LinkedIn
K

I Had one last week with a bad Bi Polar ..the Orange one in front of the IC.

Vote
Twitter Facebook LinkedIn
T

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

Vote
Twitter Facebook LinkedIn
T

55-60 degrees C on the heatsink, if memory serves. Maybe a Peletier cooler is in order for them. :-)

Tom

Vote
Twitter Facebook LinkedIn
J

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

Vote
Twitter Facebook LinkedIn

Join the Discussion

Have something to add? Share your thoughts — no account required.

Didn't find your answer?

Ask the community — no account required