I am looking to get some info on repairing my Samsung ln37a550p3f. It stopped working and won't even power on the red "power" light when plugged in. I have removed the power supply and noticed several caps that are leaking but not bulging at all. I know that the caps are a common problem but didn't want to just start replacing things without getting some advice. I am capable of replacing the caps if that is the problem but I'm am unsure of how to troubleshoot the board. Also I am not wanting to spend much because this set is about 5 years old and I didn't pay much for it. I have attached some pics of the board for reference. Any help would be great.
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Samsung ln37a550p3f
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Re: Samsung ln37a550p3f
Should I replace all of 6 on the left side in the picture? I just haven't seen anyone have the issue of the tv not powering up at all. Most people at least get the clicking sound. And one more question how do I know the right caps to get I see the values on the but on digikey they have a lot that match but are different physical size and ripple current. Sorry for all the questions I just want to get this thing fixed.
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Re: Samsung ln37a550p3f
There's a capacitor kit on ebay for this model for $13
http://www.ebay.com/itm/Repair-Kit-S...item4cf49aa524
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Re: Samsung ln37a550p3f
How do you know the caps are leaking? Looking at your photos, those caps actually look fine and those black marks on top are usually marks from a permanent marker when they are being checked. Since you don't have the red standby led light your PSU is probably not outputting the standby 5V.
Have you checked the main AC fuse?Last edited by Glitcher; 11-21-2013, 08:19 AM.
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Re: Samsung ln37a550p3f
OK, see the output connector going from the power board to the main board (with the video inputs on it?) Can you get a listing of the voltages on each pin and a photo of the label near it.
To test voltages, red probe touches each pin and black probe on chassis, DC20V range.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.
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Re: Samsung ln37a550p3f
Originally posted by tom66 View PostOK, see the output connector going from the power board to the main board (with the video inputs on it?) Can you get a listing of the voltages on each pin and a photo of the label near it.
To test voltages, red probe touches each pin and black probe on chassis, DC20V range.
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Re: Samsung ln37a550p3f
OK. Now, please undo the connector between the main board and power board. Are there any outputs if you do this?Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.
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Re: Samsung ln37a550p3f
That's exactly what I meant, it means the power board is bad. You can either replace it, or we can try to repair it. If a repair is to be attempted, the BN44-xxxxxx number off the power board is required, so schematics can be obtained.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.
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Re: Samsung ln37a550p3f
Can try my best...
Schematic available:
Do you see the two big yellow capacitors lying on their side next to each other?
With your multimeter on its highest DC range (for example 1000V) test voltage across them (not from one end to ground; red probe one end, black the other.)
What do you see? Expecting 160~170V or 380~400V, if that area of the circuit works.
You are testing on the primary side. Please be careful not to slip or touch any heatsinks, due to the shock hazard.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.
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