Re: Samsung UN46D6050 No power, blinking led twice
Ha, you called it!
My replacement SMPS IC came in and I was probably too excited to get my TV back. Either my mind went blank as to which ground I was using, or something funky happened. When I checked the voltages at CNM803a, no change from before (5VB, 13v still 0v). Walked away and cut the grass.
Came back to troubleshoot, but something in my head said to reinstall the board and do a back-light test. It's alive!
Reconnected the main board, and got my logo and no video input...
Gizzmo_jr
Member
Last Activity: 07-29-2017, 07:54 PM
Joined: 06-08-2016
Location: Kingston
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Re: Samsung UN46D6050 No power, blinking led twice
Done, values as per the above post from lastnight.
Went ahead and ordered ICM801 replacement and a transistor (just in case).
Called one of the local repair shops, found out they don't stock/sell components anymore and a quick chat over the phone with a service tech hinted they don't try fixes much, just go straight to ordering boards...shame....Leave a comment:
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Re: Samsung UN46D6050 No power, blinking led twice
Base ~11.5-12
Emitter ~12,5
Collector ~12.5
But it seems like it pulses, they all go up an additional 2DCV then back down to what I just listed.
Fun fact, the backside PCB lists Pin10 of the half bridge as Pin9, dumb.Last edited by Gizzmo_jr; 06-09-2016, 10:34 PM.Leave a comment:
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Re: Samsung UN46D6050 No power, blinking led twice
Surprise! I was able to see between the heatsink and the IC, and sure enough...
Fairchild FSFR1700XSL (B39ED also marked)
The other schematic has 14.2VDC as marked for the same pin. To whom created the schematic decided to ignore the NC pin 8 for some reason.Leave a comment:
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Re: Samsung UN46D6050 No power, blinking led twice
Well ain't that a thing, it only reaches 12.4 VDC. Proceeding to getting the item off the board now....Leave a comment:
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Re: Samsung UN46D6050 No power, blinking led twice
I'm absolutely beaming from the knowledge coming from you guys!
I'll toss that (wrong!) schematic I was using. Once I get home I'll get the values and the IC P/N.Leave a comment:
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Re: Samsung UN46D6050 No power, blinking led twice
You are correct, not to assume anything. Here is where I got that P/N from. (See attached file)...Leave a comment:
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Re: Samsung UN46D6050 No power, blinking led twice
Woah that schematic has annotations and much better info, thanks!
That troubleshooting doc is awesome, this is why I ask the pro's here
ICM801 from searching around here (trying to avoid removing everything to see the label) should be a FSFR-1700XSL
Cap CM813 tested good. I was curious about it once my eyes were focused on the transformer. Tested with one leg desoldered.
22nF or uF, can't recall what the range was on the DMM....Leave a comment:
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Samsung UN46D6050 No power, blinking led twice
Model: Samsung UN46D6050TFXZC
Version: H301
Mfg Date: October 2011
SMPS: BN44-00423a
[URL="http://www.shopjimmy.com/media/catalog/product/cache/1/image/9df78eab33525d08d6e5fb8d27136e95/s/h/shopjimmy-bn44-00423a-top_1.jpg"]Board Front Pic[/URL]
[URL="http://assets.shopjimmy.com/media/catalog/product/cache/1/image/9df78eab33525d08d6e5fb8d27136e95/s/h/shopjimmy-bn44-00423a-bottom.jpg"]Board Rear Pic[/URL]
Ok I need help!
Background;
Watching TV few nights ago, 2min left in my show of course, and TV goes black.... -
Re: New Members - please post your introductions here
Hey! Hoping I can get my tv fixed up, and possibly learn a few things along the way.Leave a comment:
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