Affinity SLE2039 LED TV has no blacklighting


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Affinity SLE2039 LED TV has no blacklighting

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turix
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Aug 24, 2015, 7:46 AM

Post #1 of 21 (5903 views)
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Affinity SLE2039 LED TV has no blacklighting	Can't Post

I have performed the flashlight test and confirmed the TV has no backlighting. I opened up the TV but I don't see an inverter board, the cable that goes to the LEDs plugs directly into the power board. I checked voltage on the 6 wires going to the LEDs and there is 20v/40v/60v between various wires. Does this mean the LED array is bad? There are 3 LED strips and none of them ever light up. The 6 wires going to the LEDs have a red/black/red/black/red/black pattern.

jts1957
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Aug 24, 2015, 10:29 AM

Post #2 of 21 (5898 views)
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Re: [turix] Affinity SLE2039 LED TV has no blacklighting [In reply to]	Can't Post

So you CAN see images using 'the flashlight test?' Not to mention hear sound.

LEDs = NO flash at ANY point? Try disconnecting power cable from PS board to Main board and see if LEDs come on.

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Location: Far, Far Away

(This post was edited by jts1957 on Aug 24, 2015, 10:30 AM)

turix
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Aug 24, 2015, 7:27 PM

Post #3 of 21 (5886 views)
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Re: [jts1957] Affinity SLE2039 LED TV has no blacklighting [In reply to]	Can't Post

Yes, I can see images with the flashlight test.

I have not seen the LEDs flash at any point since the screen initially went dark. It wasn't a gradual thing where they got dimmer over time, it went dark suddenly one day.

I disconnected the cable going from PS board to main board and did not see LEDs come on. In the picture of the PS board, it is the cable on the top left.

jts1957
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Aug 24, 2015, 7:49 PM

Post #4 of 21 (5884 views)
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Re: [turix] Affinity SLE2039 LED TV has no blacklighting [In reply to]	Can't Post

Try unplugging CN2 on PS board.

I know it will require you to hook up an active source, but when you can discern video images with your flashlight, is there sound present?

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Location: Far, Far Away

turix
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Aug 24, 2015, 8:25 PM

Post #5 of 21 (5880 views)
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Re: [jts1957] Affinity SLE2039 LED TV has no blacklighting [In reply to]	Can't Post

The "CN2" on the PS board has two wires that go to the "CN2 Inverter" plug on the main board. Does that mean the inverter is built into the main board on this model?

I hooked up my PS3 to the TV and could hear sound from it. I also used the flashlight and could see images at the same time.

I unplugged CN2 after that and turned TV on and off and didn't see any LEDs come on.

jts1957
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Aug 24, 2015, 9:07 PM

Post #6 of 21 (5874 views)
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Re: [turix] Affinity SLE2039 LED TV has no blacklighting [In reply to]	Can't Post

NO 'Inverters' used. More of a hold-over term. Just like they advertise TV as LED TV. Is actually a LED backlit TFT-LCD TV. Just another DC voltage that gets turned on & off.
Wealth of info on back sides of boards, which is all I get to go with as a service manual for Affinity/Orion/Meijer eludes me.

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Location: Far, Far Away

turix
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Aug 24, 2015, 9:31 PM

Post #7 of 21 (5871 views)
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Re: [jts1957] Affinity SLE2039 LED TV has no blacklighting [In reply to]	Can't Post

Ah. Yeah, I wasn't sure what was being inverted. My understanding of an inverter is when going from DC->AC. The LEDs are DC, the boards are DC, so it makes sense that an inverter is not needed. I'm assuming the older style TVs that used CCFLs needed inverters to run AC to the backlights. Don't those CCFL bulbs run on AC?

I'll check out the back side of those boards and get a picture of them to post.

jts1957
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Aug 24, 2015, 10:29 PM

Post #8 of 21 (5867 views)
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Re: [turix] Affinity SLE2039 LED TV has no blacklighting [In reply to]	Can't Post

Don't bother, unless yours shows something that SJ doesn't. http://www.shopjimmy.com/affinity/sle2039

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Location: Far, Far Away

turix
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Aug 27, 2015, 12:53 AM

Post #9 of 21 (5848 views)
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Re: [jts1957] Affinity SLE2039 LED TV has no blacklighting [In reply to]	Can't Post

No, they look just like that.

jts1957
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Aug 27, 2015, 1:10 AM

Post #10 of 21 (5846 views)
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Re: [turix] Affinity SLE2039 LED TV has no blacklighting [In reply to]	Can't Post

Quote

I'm assuming the older style TVs that used CCFLs needed inverters to run AC to the backlights. Don't those CCFL bulbs run on AC?

YES.

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Location: Far, Far Away

turix
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Aug 27, 2015, 1:27 AM

Post #11 of 21 (5844 views)
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Re: [jts1957] Affinity SLE2039 LED TV has no blacklighting [In reply to]	Can't Post

Right now, I'm suspecting the LEDs strips themselves are the most likely failure point, however I've read online that LEDs will dim over time before failing. This didn't happen in my case, backlighting failed suddenly and has never returned.

I haven't found anywhere to buy replacement LEDs strips for this model online. There are a few used boards on eBay though. I don't think there were very many made of this model, so replacement parts are scarce.

Will checking to see if there's voltage on the CN2 wires be helpful in any way? If it's just another DC voltage that gets turned on when needed for the backlighting, then that's the only thing I can think of to troubleshoot further.

(This post was edited by turix on Aug 27, 2015, 1:29 AM)

jts1957
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Aug 27, 2015, 1:42 AM

Post #12 of 21 (5840 views)
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Re: [turix] Affinity SLE2039 LED TV has no blacklighting [In reply to]	Can't Post

http://www.digikey.com/...d-tv-picture-quality

You may have more numbers to research after gaining access to inside of panel.

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Location: Far, Far Away

(This post was edited by jts1957 on Aug 27, 2015, 1:43 AM)

turix
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Oct 16, 2015, 4:18 PM

Post #13 of 21 (5713 views)
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Re: [jts1957] Affinity SLE2039 LED TV has no blacklighting [In reply to]	Can't Post

Finally got around to opening up the panel again. There are three different boards with 10 LEDs each. I don't imagine all three would go bad at once. If one goes bad, does it make all of them not turn on? If not, then it may be the power board after all.

jts1957
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Oct 16, 2015, 4:28 PM

Post #14 of 21 (5711 views)
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Re: [turix] Affinity SLE2039 LED TV has no blacklighting [In reply to]	Can't Post

I think you will find each strip's LEDs are wired in series. Each strip may then be connected in series with one another or 3 strips of 10 in parallel with the PS.

Panel assembly number?

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Location: Far, Far Away

(This post was edited by jts1957 on Oct 16, 2015, 4:28 PM)

turix
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Oct 16, 2015, 5:03 PM

Post #15 of 21 (5708 views)
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Re: [jts1957] Affinity SLE2039 LED TV has no blacklighting [In reply to]	Can't Post

The LEDs on each strip are in series. The 3 strips of 10 seem to be in parallel with the PS.

Forgive me, but how do I find the panel assembly number?

jts1957
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Oct 16, 2015, 5:23 PM

Post #16 of 21 (5707 views)
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Re: [turix] Affinity SLE2039 LED TV has no blacklighting [In reply to]	Can't Post

Series xmas tree bulbs of ye olde days were series wired - one burnt out, they all went out.

http://ww2.justanswer.com/...2_234806_image-a.jpg

May be barcode tag near top or maybe under a board?

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Location: Far, Far Away

turix
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Oct 16, 2015, 6:03 PM

Post #17 of 21 (5705 views)
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Re: [jts1957] Affinity SLE2039 LED TV has no blacklighting [In reply to]	Can't Post

jts1957
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Oct 16, 2015, 7:01 PM

Post #18 of 21 (5701 views)
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Re: [turix] Affinity SLE2039 LED TV has no blacklighting [In reply to]	Can't Post

Appears to be right style of number, but nothing found.

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Location: Far, Far Away

turix
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Oct 16, 2015, 8:14 PM

Post #19 of 21 (5699 views)
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Re: [jts1957] Affinity SLE2039 LED TV has no blacklighting [In reply to]	Can't Post

I'm not surprised. It's a pretty obscure brand. The closest models are under the Westinghouse name.

turix
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Oct 20, 2015, 4:43 PM

Post #20 of 21 (5686 views)
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Re: [turix] Affinity SLE2039 LED TV has no blacklighting [In reply to]	Can't Post

Can't seem to troubleshoot it any further. Guess I'll just junk it. Thanks for your effort on trying to get to the bottom of it, even though it was a dead end.<br>

(This post was edited by turix on Oct 20, 2015, 4:44 PM)

jts1957
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Oct 20, 2015, 5:46 PM

Post #21 of 21 (5678 views)
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Re: [turix] Affinity SLE2039 LED TV has no blacklighting [In reply to]	Can't Post

Each individual LED should check like a diode with meter.
Each LED should light using about 3 VDC 40mA supply. Use a 100 ohm resistor to limit current and observe polarity.

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Location: Far, Far Away

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