Hello
This is my first post in this forum since joining, but I've been reading a lot of very good information.
My Problem is with a Samsung LN-T3232H 32" Flat Screen TV.
The Power Supply Board is #BN44-00156A SE38B3T7722 Rev 1.1.
The picture went black and sound suddenly stopped.
I could get the red light on the front of the TV to blink if I repeatedly pushed the power button, but I never was able to get any picture or sound.
I unplugged the TV for a few minutes without any results.
No sound whatsoever from the set.
Reading on the web, I learned that the Power Supply capacitors could cause this problem and sure enough, several of the capacitors near the heat sinks were bulging with one showing corrosion on the top, so I figure that I'd found my problem.
I soldered in new (nichicon and Nippon) capacitors (same values), re-installed the board and got ready for my TV to work again.
I hit the on button and nothing but the red light on the lower right of the TV came on.
I still had the back off the TV, and I didn't see or hear any light or noise...only the red light.
This TV used to make a "click" when I turned it on, but there is no sound now.
I unplugged the connector to the Main Board and checked voltages (Terminal CNM 801) and I have around 3.1 VDC on terminal #3 (stand-by).
No voltages on any other pins on this connector.
On the other side of the board I unplugged the connector to the Inverter Board (Terminal CNM 802)... and checked voltages.
All I have is something less than 2V on pins 1-5, which according to marking on the board should be 24V.
I know that the voltage readings are not accurate enough, but I was in a hurry.
I checked my meter on some new batteries, and it's reading correctly.
The fuse on the TV is Good....120VAC in and out.
I just have a few questions for now.
Could bad solder joint on one of the capacitors that I replaced cause this problem?
Do the capacitors have any effect on the 24V power supply.....Would a bad capacitor affect this power source?
Is there any other fuses on this board that could affect the 24V supply?
I replaced all of the bulging capacitors:
I've been soldering since I was 10 years old....car relays, stereo systems...etc.
But....after soldering in these capacitors I learned 3 things.
1- You guys that can do this well are really proficient and talented.
2- I definitely can't see well enough to do this kind of work without investing in a microscope or some kind of vision aid.
3- It's a lot easier to lift a pad when removing components than it is to fix it.
I can't believe how the joints look after I took a picture of them. They look OK with a magnifying glass, but the pictures tell another story.
I'm willing to take any voltage readings needed and supply any pictures if you guys are willing to help me.
I may just need to buy another Power Supply Board, but I'd like to be sure.
Just tell me what to un-plug and where to take the readings.
All help is much appreciated.
Sorry this is so long.
steve
This is my first post in this forum since joining, but I've been reading a lot of very good information.
My Problem is with a Samsung LN-T3232H 32" Flat Screen TV.
The Power Supply Board is #BN44-00156A SE38B3T7722 Rev 1.1.
The picture went black and sound suddenly stopped.
I could get the red light on the front of the TV to blink if I repeatedly pushed the power button, but I never was able to get any picture or sound.
I unplugged the TV for a few minutes without any results.
No sound whatsoever from the set.
Reading on the web, I learned that the Power Supply capacitors could cause this problem and sure enough, several of the capacitors near the heat sinks were bulging with one showing corrosion on the top, so I figure that I'd found my problem.
I soldered in new (nichicon and Nippon) capacitors (same values), re-installed the board and got ready for my TV to work again.
I hit the on button and nothing but the red light on the lower right of the TV came on.
I still had the back off the TV, and I didn't see or hear any light or noise...only the red light.
This TV used to make a "click" when I turned it on, but there is no sound now.
I unplugged the connector to the Main Board and checked voltages (Terminal CNM 801) and I have around 3.1 VDC on terminal #3 (stand-by).
No voltages on any other pins on this connector.
On the other side of the board I unplugged the connector to the Inverter Board (Terminal CNM 802)... and checked voltages.
All I have is something less than 2V on pins 1-5, which according to marking on the board should be 24V.
I know that the voltage readings are not accurate enough, but I was in a hurry.
I checked my meter on some new batteries, and it's reading correctly.
The fuse on the TV is Good....120VAC in and out.
I just have a few questions for now.
Could bad solder joint on one of the capacitors that I replaced cause this problem?
Do the capacitors have any effect on the 24V power supply.....Would a bad capacitor affect this power source?
Is there any other fuses on this board that could affect the 24V supply?
I replaced all of the bulging capacitors:
I've been soldering since I was 10 years old....car relays, stereo systems...etc.
But....after soldering in these capacitors I learned 3 things.
1- You guys that can do this well are really proficient and talented.
2- I definitely can't see well enough to do this kind of work without investing in a microscope or some kind of vision aid.
3- It's a lot easier to lift a pad when removing components than it is to fix it.
I can't believe how the joints look after I took a picture of them. They look OK with a magnifying glass, but the pictures tell another story.
I'm willing to take any voltage readings needed and supply any pictures if you guys are willing to help me.
I may just need to buy another Power Supply Board, but I'd like to be sure.
Just tell me what to un-plug and where to take the readings.
All help is much appreciated.
Sorry this is so long.
steve
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