Re: Lg 47 led flashes then goes off
Thanks for replies, Well I replaced 35+ LEDs individually with my hot air station 10 secs at 280c airflow 40% .
I had the diffuser in front of the filters. I now have picture, sound with a little ghosting on 3 LEDs duevto lenses reflector spacers being removed on previous repair.
The picture is fine once the picture is on playing movie etc but when on menu you can see a few spots. Not cost effective to replace full array which is what I would have liked to do on this occasion.
Thanks again
deegee2016
Member
Last Activity: 10-16-2023, 06:28 PM
Joined: 04-30-2016
Location: uk
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Re: Lg 47 led flashes then goes off
Hi all,
Well I'm back with readings.
I have repaired the backlights and they stay on now.
Voltages are as follows:
Red probe to pin 1 led + = 105v high / 99.6v low
Red probe to pin 3 led + = 106v high / 104.8v low
Red probe to pin 5 led - = 27.7v
Red probe to pin 7 led - = 29.9v
Problem I'm having now is all I can see is white spot glows no image .
I must admit I may have put the difusser sheets back to front...Leave a comment:
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Re: Lg 47 led flashes then goes off
Thankyou Budm for your help with this. I usually work on iphones so this is quite new to me at the moment.
I will get the voltage output readings for you in a bit and post with board image with results.
I have one strip that's been jumpered that I need to rectify first and all strips should be good before the test.
Once again thankyouLeave a comment:
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Re: LG 50PA4500 - Sound no Picture
Sorry ppl, I was having trouble posting. NotedLeave a comment:
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Re: Lg 47 led flashes then goes off
Thankyou Mr Barton for the link .
So two or three only won't work it needs all connected and all LEDs functioning to stay illuminated.
I don't have steady voltage at led connector it should stay at 94v or thereabouts but it decreases.
Even with led connector pulled out .Leave a comment:
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Re: Lg 47 led flashes then goes off
Power Supply underside:
[url]https://ibb.co/bv1UeQ[/url]
[url]https://ibb.co/hoVpeQ[/url]Re: Lg 47 led flashes then goes off<...o/hoVpeQ[/url]Re: Lg 47 led flashes then goes off
Power Supply underside:
[url]https://ibb.co/bv1UeQ[/url]
[url]https://ibb.co/hoVpeQ[/url]Re: Lg 47 led flashes then goes off<...<br /> <br />Leave a comment:
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Re: Lg 47 led flashes then goes off
Hi again lads will sort requested info and get it up for viewing .
Led rows: 6 x two strips of 5 LEDs and 4 LEDs
Backlight strip: 94v -1331 47" Row 2.1 (Rev 0.7) R1-Type 6916L-1174A
Power supply: EAX64905501
AV Board: EAX647970031(1.2)
As stated there was previous work carried out which was not disclosed .
I have replaced approx 8-10 LEDs and all strips work fine on DCPS.
Also will only a few rows plugged in work or do they all need to...Leave a comment:
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Re: Lg 47 led flashes then goes off
Thanks for the reply.
Its an LG 47" LED TV Panel model LC 470DUE(SFR-1)
Links to photos below.
[url]https://ibb.co/eHwjuQ[/url]
[url]https://ibb.co/j0BZuQ[/url]
[url]https://ibb.co/dpMZuQ[/url]
[url]https://ibb.co/i9oEuQ[/url]
[url]https://ibb.co/eiWZuQ[/url]
My led install:
[url]https://ibb.co/i9oEuQ[/url]
Previous repaired led install:
[url]https://ibb.co/eiWZuQ[/url]Re: Lg 47 led flashes then goes off<...<br /> Thanks...Leave a comment:
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Lg 47 led flashes then goes off
I have an LG47ODUE that shows LG Logo then goes black under torchlight image is visible.
Power supply board tests:
Standby voltages: in order on connector:
9) Ground - Ground = 0.0v
8) 12v - NC = 11.95v
7) 12v - 12v = 11.95v
6) Ground - Ground = 0.0v
5) 24v - 24v = 24.77v
4) Ground - Ground = 0.0v
3) 3.5v - PDIM2 = 3.54v
2) 3.5v - PDIM1 = 3.55v
1) PwrOn - DrvOn = 3.42v
Most voltages not present until standby button is pressed
Led Connector Tests:
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Lg 47 led flashes then goes off
Hi all,
I have an LG47ODUE that shows LG Logo then goes black under torchlight image is visible.
Power supply board tests:
Standby voltages: in order on connector:
9) Ground - Ground = 0.0v
8) 12v - NC = 11.95v
7) 12v - 12v = 11.95v
6) Ground - Ground = 0.0v
5) 24v - 24v = 24.77v
4) Ground - Ground = 0.0v
3) 3.5v - PDIM2 = 3.54v
2) 3.5v - PDIM1 = 3.55v
1) PwrOn - DrvOn = 3.42v
Most voltages not present until standby button is pressed
Led Connector... -
Re: LG 50PA4500 - Sound no Picture
I have an LG47ODUE that shows LG Logo then goes black under torchlight image is visible.
Power supply board tests:
Standby voltages: in order on connector:
9) Ground - Ground = 0.0v
8) 12v - NC = 11.95v
7) 12v - 12v = 11.95v
6) Ground - Ground = 0.0v
5) 24v - 24v = 24.77v
4) Ground - Ground = 0.0v
3) 3.5v - PDIM2 = 3.54v
2) 3.5v - PDIM1 = 3.55v
1) PwrOn - DrvOn = 3.42v
Most voltages not present until standby button is pressed
...Leave a comment:
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