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shamwow replied to Samsung LN46C750R2F/ Sound but No Video

in Troubleshooting TVs and Video Sources

07-17-2015, 06:18 PM
Re: Samsung LN46C750R2F/ Sound but No Video

Just wanted to say thanks to budm for the guidance with my TV issue.

Replaced the CI818 cap with a new capacitor from digikey.com

I used a 630VDC as per budm's suggestion.

MFG P/N --- ECW-FA2J474J

[url]http://www.digikey.com/product-detail/en/ECW-FA2J474J/PCF1574-ND/3088042[/url]

Thanks again! Feels great to have the TV back! Re: Samsung LN46C750R2F/ Sound but N...nce with my TV

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shamwow replied to Samsung LN46C750R2F/ Sound but No Video

in Troubleshooting TVs and Video Sources

07-17-2015, 02:17 PM
Re: Samsung LN46C750R2F/ Sound but No Video

Thanks. Hope to report back later with some good news.

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shamwow replied to Samsung LN46C750R2F/ Sound but No Video

in Troubleshooting TVs and Video Sources

07-17-2015, 01:39 PM
Re: Samsung LN46C750R2F/ Sound but No Video

the bad cap I removed had no indication of positive or negative. I know the round tall caps have an indication on them...

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shamwow replied to Samsung LN46C750R2F/ Sound but No Video

in Troubleshooting TVs and Video Sources

07-17-2015, 01:38 PM
Re: Samsung LN46C750R2F/ Sound but No Video

Thanks budm...

New caps were sent to my house today... question regarding installation.

Is there a positive and negative side on the cap? I checked the board and did not see an indication of positive or negative.

Thanks.

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shamwow replied to Samsung LN46C750R2F/ Sound but No Video

in Troubleshooting TVs and Video Sources

07-15-2015, 08:06 AM
Re: Samsung LN46C750R2F/ Sound but No Video

[url]http://www.digikey.com/product-search/compare/en?returnUrl=%2Fproduct-search%2Fen%3Fpv405%3D1836%26FV%3Dfff40002%252Cfff80010%252C34002e%252C7f00026%252Ce340004%252C1434001b%26mnonly%3D0%26newproducts%3D0%26ColumnSort%3D0%26page%3D1%26quantity%3D0%26ptm%3D0%26fid%3D0%26pageSize%3D25&part=PCF1606-ND&part=PCF1607-ND[/url]

The two I found that meet the specs... Going to order the one in stock...

[url]http://www.digikey.com/product-detail/en/ECW-FD2W474J/PCF1606-ND/3844528[/url]

Looks...

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shamwow replied to Samsung LN46C750R2F/ Sound but No Video

in Troubleshooting TVs and Video Sources

07-15-2015, 07:39 AM
Re: Samsung LN46C750R2F/ Sound but No Video

Thanks budm... I just checked your link and the specs appear OK but the lead spacing does not look correct. I have the bad cap in hand and the lead spacing that I measure is 15mm...

I also saw you recommend a 630V or higher on another thread. What's the reasoning for that? Thank in advance.

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Last edited by shamwow; 07-15-2015, 07:48 AM.
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shamwow replied to Samsung LN46C750R2F/ Sound but No Video

in Troubleshooting TVs and Video Sources

07-14-2015, 05:56 PM
Re: Samsung LN46C750R2F/ Sound but No Video

Having a hard time finding a replacement cap ...

Anyone know where to find the .47uf 450v cap for this Samsung?

Thanks in advance.

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shamwow replied to Samsung LN46C750R2F/ Sound but No Video

in Troubleshooting TVs and Video Sources

07-14-2015, 05:26 PM
Re: Samsung LN46C750R2F/ Sound but No Video

Using this thread as a reference: [url]https://www.badcaps.net/forum/showthread.php?t=32881[/url]

My unit does have the BN44-00341B Power Supply...

After I disconnected the PS Cable to the Mainboard and supplied power to the TV - the backlight did not come on.

Unplugged the power, reconnected cable and applied power - the TV turns on but no backlight.

Upon closer examination of the PS...

a lil bit closer...

...

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shamwow replied to Samsung LN46C750R2F/ Sound but No Video

in Troubleshooting TVs and Video Sources

07-14-2015, 09:30 AM
Re: Samsung LN46C750R2F/ Sound but No Video

I will say that I have never worked on a TV or power supply before.

I have printed out and am reading the Basic LCD repair guide... I do have a Fluke multimeter but do not have an isolation transformer.

I do appreciate the help and guidance as I really do enjoy solving and fixing my own problems.

Perhaps I can take a better pic of the power supply and someone can help guide me in the right direction for measuring the DCV between the main filter caps?

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shamwow replied to Samsung LN46C750R2F/ Sound but No Video

in Troubleshooting TVs and Video Sources

07-14-2015, 09:07 AM
Re: Samsung LN46C750R2F/ Sound but No Video

Thanks for the clarification.

I will get the part number for the power supply.

Sorry but I am a bit unfamiliar with those terms... What do you mean by PS-ON and BL-ON? Power supply and backlight on?

How can I check for PS-ON and BL-ON?

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shamwow replied to Samsung LN46C750R2F/ Sound but No Video

in Troubleshooting TVs and Video Sources

07-14-2015, 07:35 AM
Re: Samsung LN46C750R2F/ Sound but No Video

Thanks budm for the response!

Here are the pics as requested:

The only part I replaced was the backlight inverter - piece to the far right in picture #1. It is under the black cover.

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shamwow started a topic Samsung LN46C750R2F/ Sound but No Video

in Troubleshooting TVs and Video Sources

07-13-2015, 09:00 PM
Samsung LN46C750R2F/ Sound but No Video

Hello all. I'm having an issue with my Samsung LN46C750R2F LCD TV. Just recently the picture went out. I still have audio on the TV and when I turn off the lights and shine a flashlight at the screen on an angle - I can see the image. I can change the source without an issue as well.

After reading various threads and viewing a few youtube videos - I concluded that the Backlight Inverter is bad. I purchased a new one from an online retailer and installed it when received. The same issue remained... The retailer even sent me another one in case the original was faulty. The second...

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shamwow replied to New Members - please post your introductions here

in Announcements & Related News

07-13-2015, 05:38 PM
Re: New Members - please post your introductions here

Evening folks! Lurked around here for a few months and decided to join.

I hope I can contribute in areas where I excel and gain some knowledge as well.

All the best!

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