Dear Hive!
First of all, i am really happy that i found this knowledge-base about electronics. Really good source of info. Altough i am looking for some help.
Recently i got 2 pieces of Samsung e2220w monitors, to make one good out of them. unfortunately the 2 monitors has 2 different kind of power supply boards.
Both of them gives 2 sec to black issue. i will make another post about the second one.
Number one:
This is an ILPI-227 REV. A board.
This is how far i got:
On the 100uF 450V cap i measure 330V DC (seems correct)
The caps are not bulging, no visible defect.
Measured the Caps, all of them is close to the marked capacitance
ESR`s are around .17-.40 ohm (not sure about how much it should be)
Checked inverter transformers. all of the secondaries are giving me the same resistance (around 960 ohms)
Took off the MOSFET , gave a diode test, i measured around 680ohms from pin 1 to pin 2 None of the other pins or other directions gave me any other value. I attached a pic about the measuring of the MOSFET.
I tried with both the lcd screens, same effect. (i am not sure how to check ccfl`s if they are broken or not) tried with both the t-con boards, same effect.
Kind of stuck here. solder job is pretty coldish, some corrosion was found, but not significant.
Anybody has any info on this one? if i am not detailed enough, let me know please.
Cheers: Titus
First of all, i am really happy that i found this knowledge-base about electronics. Really good source of info. Altough i am looking for some help.
Recently i got 2 pieces of Samsung e2220w monitors, to make one good out of them. unfortunately the 2 monitors has 2 different kind of power supply boards.
Both of them gives 2 sec to black issue. i will make another post about the second one.
Number one:
This is an ILPI-227 REV. A board.
This is how far i got:
On the 100uF 450V cap i measure 330V DC (seems correct)
The caps are not bulging, no visible defect.
Measured the Caps, all of them is close to the marked capacitance
ESR`s are around .17-.40 ohm (not sure about how much it should be)
Checked inverter transformers. all of the secondaries are giving me the same resistance (around 960 ohms)
Took off the MOSFET , gave a diode test, i measured around 680ohms from pin 1 to pin 2 None of the other pins or other directions gave me any other value. I attached a pic about the measuring of the MOSFET.
I tried with both the lcd screens, same effect. (i am not sure how to check ccfl`s if they are broken or not) tried with both the t-con boards, same effect.
Kind of stuck here. solder job is pretty coldish, some corrosion was found, but not significant.
Anybody has any info on this one? if i am not detailed enough, let me know please.
Cheers: Titus
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