Re: Samsung LN-T3242H power supply
i was also getting about 60v at the points shown on the pic. does that seem high?...
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Re: Samsung LN-T3242H power supply
since i was stumped, i plugged the board in and took some voltages. while i was doing that the IC at ICP801S got so hot it started smoking and almost took it self off the board. before i order the new chip, is there something else that could cause that chip to fail? thanks.
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Re: Samsung LN-T3242H power supply
i got the new parts on the board, its not shorting out but it wont power on. I am just getting the red standby light and it will flash every once in a while. at the moment i am stumped.
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Re: Samsung LN-T3242H power supply
Unrelated.
what should the voltage be on the on/off pin?...
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Re: Samsung LN-T3242H power supply
nice find!
I did check the other components and QP801S was the original shorted component and that has been replaced. however I will order a new one because I used that FET from an older board I had around. DP814 and DZP801 tested OK in circuit.
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Re: Samsung LN-T3242H power supply
Im having trouble finding the correct part on mouser.
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Re: Samsung LN-T3242H power supply
and do you think a 4R7 would work in its place?
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Re: Samsung LN-T3242H power supply
So the code on top of the SMD should be 6R8?
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Re: Samsung LN-T3242H power supply
I also have a bn44-00173a that i have for spare parts. If i could found out the top number value, I could pull one off the 173a board.
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Re: Samsung LN-T3242H power supply
I took another look at the back of the board and found a burnt resistor at RP817, removed it and it tested open. i dont have my camera with me to take a picture, however I found a schematic. I am not sure what type of resistor that is, can you help me find the correct replacement? thanks!!...
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Re: Samsung LN-T3242H power supply
Update
I have replaced the FET at QP801S and the board is not shorting or popping the fuse anymore. However the tv does not fully power on, the standby light is on but doesnt power up. where would you recommend checking next?
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Re: Samsung LN-T3242H power supply
You guys are correct. the FET at QP801S is shorted, once i have a replacement installed i will post an update. Thanks!
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Re: Samsung LN-T3242H power supply
QHAD01216 is the small transformer, i took that off the board and tested for shorts and it looked good.
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Re: Samsung LN-T3242H power supply
pin 1-4 out of circuit was open. can you help me identify the part at RP819? it has 5W0.12ohmJ written on top.
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Re: Samsung LN-T3242H power supply
I tested the rectifier and there was a short between the 1-4 pins. I removed the part and tested again but it tested good. the short is somewhere else on the board. I suspect the part QHAD01216 is where the short is. How do I properly test that component?
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Re: Samsung LN-T3242H power supply
should i remove the rectifier from the board for testing?
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Re: Samsung LN-T3242H power supply
thanks for the reply!
1. that is some glue on VX801, i had swapped that part with a know good board to see if anything changed.
2. i will test the rectifier and post my findings! thanks
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Samsung LN-T3242H power supply
Hi,
I have a samsung LN-T3242H that keeps blowing the fuse on the power supply board. the power supply board is model BN44-00192A. nothing on the board has any visible sign of damage. does anyone have an idea of where to start troubleshooting? Thanks!...
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Re: Samsung Syncmaster 245BW
I replaced the KIA431A with new TL431AIZ and monitors are working now with a good 24v.
unfortunately, when i powered up one the monitors the screen was cracked. do you know of a good replacement or supplier for that part. i have the screen out but cant seem to find a good part number on it....
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Re: Samsung Syncmaster 245BW
I believe the problem is the semiconductor at position ZDTM851. The part number is KIA431A. Does anyone know where buy a replacement part on the internet?
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