Home |
Search |
Today's Posts |
|
Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
Reply |
|
LinkBack | Thread Tools | Display Modes |
#1
|
|||
|
|||
Samsung TV TXE2545 Bottom Half of Picture
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. |
#2
|
|||
|
|||
Change the 8350Q and the 3 filters that are close by.
Samsung has a Kit out for that set.... kip "Brad" wrote in message ... 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. |
#3
|
|||
|
|||
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: Change the 8350Q and the 3 filters that are close by. Samsung has a Kit out for that set.... kip "Brad" wrote in message ... 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. |
#4
|
|||
|
|||
I Had one last week with a bad Bi Polar ..the Orange one in front of the IC.
kip "RonKZ650" wrote in message oups.com... 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: Change the 8350Q and the 3 filters that are close by. Samsung has a Kit out for that set.... kip "Brad" wrote in message ... 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. |
#7
|
|||
|
|||
On Tue, 12 Apr 2005 17:20:17 -0400, "kip" wrote:
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 "Tom MacIntyre" wrote in message .. . On Tue, 12 Apr 2005 14:37:12 GMT, (Brad) wrote: 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 Before you type your password, credit card number, etc., be sure there is no active key logger (spyware) in your PC. |
#8
|
|||
|
|||
On Tue, 12 Apr 2005 20:25:14 GMT, Tom MacIntyre
wrote: On Tue, 12 Apr 2005 14:37:12 GMT, (Brad) wrote: 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. 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 |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
Samsung Microwave & GE Microwave oven | Electronics Repair | |||
Old JVC VCRs - half of picture missing | Electronics Repair | |||
Samsung txe2545 | Electronics Repair | |||
Compaq P110 21" monitor "jumping" at bottom half of the screen | Electronics Repair | |||
When Is A Half Inch Dowel Not A Half Inch Dowel? | Woodworking |