Hi everyone,
I bought an LCD TV of a local auction site thinking I could fix the caps on it and it would work
Unfortunatelly, the caps were fine (I changed them anyway just to be sure/all the caps with a marker dot have been replaced).
When you switch on the TV the blue stand-by ligh comes on after about a 5 second wait (way too long in my opinion) and the screen stays black/no sound).
The seller said it just stopped working over night (did not mention that he tried to repair it)
Having looked at the power supply more closely it was obvious somebody tried to repair it already. One of the transistors had been replaced and a capacitor also. I suspect that IC201 had been replaced also - judging from the solder work. Ive circled all of these areas in red. Also IC201 looked to have a black blob like substance on top of it/some kind of black residue(?) - I thought it was damaged but cleaned it quite easily with isopropyl alcohol - now it looks new and I can read the parts number - could this have been a tell tell sign?
What Ive done:
1)I checked the N channel mosfet - its fine (reads quite high on the diode test, but shows all the signs of a working mosfet according to a manual I read online)
2) checked the replaced resistor (should be 10Ohm but is 10,5 - That shouldnt be a problem, right?
3) I have no idea how to check the IC201 but judging from the working replacement parts I would assume it is functional:
Anyone have any idea what the problem could be?
The TV is a Hanseatic LC1910T (Samsung panel), the same TV was also made by Daewoo (DAEWOO DLT-19L2), but no schematics or anything - its a really unknown brand I guess.
The power supply number is: SHP2204B-301
The only thread (french) I found on this PS:
http://www.teleservice-depannage.com/t10916-DAEWOO-DLT-19L2.htm
Photo album:
http://imgur.com/a/Qqv1u
Thanks for having a look at this guys!
I bought an LCD TV of a local auction site thinking I could fix the caps on it and it would work
Unfortunatelly, the caps were fine (I changed them anyway just to be sure/all the caps with a marker dot have been replaced). When you switch on the TV the blue stand-by ligh comes on after about a 5 second wait (way too long in my opinion) and the screen stays black/no sound).
The seller said it just stopped working over night (did not mention that he tried to repair it
)Having looked at the power supply more closely it was obvious somebody tried to repair it already. One of the transistors had been replaced and a capacitor also. I suspect that IC201 had been replaced also - judging from the solder work. Ive circled all of these areas in red. Also IC201 looked to have a black blob like substance on top of it/some kind of black residue(?) - I thought it was damaged but cleaned it quite easily with isopropyl alcohol - now it looks new and I can read the parts number - could this have been a tell tell sign?
What Ive done:
1)I checked the N channel mosfet - its fine (reads quite high on the diode test, but shows all the signs of a working mosfet according to a manual I read online)
2) checked the replaced resistor (should be 10Ohm but is 10,5 - That shouldnt be a problem, right?
3) I have no idea how to check the IC201 but judging from the working replacement parts I would assume it is functional:
Anyone have any idea what the problem could be?
The TV is a Hanseatic LC1910T (Samsung panel), the same TV was also made by Daewoo (DAEWOO DLT-19L2), but no schematics or anything - its a really unknown brand I guess.
The power supply number is: SHP2204B-301
The only thread (french) I found on this PS:
http://www.teleservice-depannage.com/t10916-DAEWOO-DLT-19L2.htm
Photo album:
http://imgur.com/a/Qqv1u
Thanks for having a look at this guys!
