Re: LG 50PA5500 stripped...
I wish.. looked through my stock. Nothing even close
I wish.. looked through my stock. Nothing even close
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Did I leave the soldering iron on? -
Re: LG 50PA5500 stripped...
Try on UTsource.net maybe they can find it
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Re: LG 50PA5500 stripped...
Went ahead and ordered the board. For 30 dollars it's worth a shot. I'm going to hack this one and see.what the results are.
Tried UTsource with no results.Did I leave the soldering iron on?Comment
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Re: LG 50PA5500 stripped...
okay here's the outcome got the new buffer board in today had the same lines in the screen and then the screen went dead imediately. Factory defect. There's something behind the anti rubbing tape that they put on the side of the frame this has caused a rupture in the Y ribbon cable that goes into the panel. As it has broken two fine wire fragments that run those horizontal lines.
If these buffers do not address every single line on the screen it will blow the IC immediately. The IC needs to address every single line at the same time. This is the first I've ever seen with and IC shorting if it doesn't address all horizontal lines!
I am taking the screen out of the frame and I am going to attempt to repair the ribbon cable and replace the IC on the board. Wish me luck!
http://i845.photobucket.com/albums/a...psc72da4a4.jpg
P.s. look at the black felt tape right above the arrow in the frame. That's the affected area that has severed the connection in the ribbon.Last edited by freakaftr8; 01-10-2014, 03:21 PM.Did I leave the soldering iron on?Comment
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Re: LG 50PA5500 stripped...
And the bad spot in the cable. Frame removed.
http://i845.photobucket.com/albums/a...ps590bb918.jpgDid I leave the soldering iron on?Comment
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Re: LG 50PA5500 stripped...
Hmm, any chance of repairing that? Looks like a design error to me..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.Comment
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Re: LG 50PA5500 stripped...
un believable! You know what happened? They make these TVs with the frames so damn thin now that the plastic finger that holds the plastic frame to the metal frame surround that houses the panel has worn into the ribbon!! There's literally no space between!
http://i845.photobucket.com/albums/a...ps515e5da6.jpgDid I leave the soldering iron on?Comment
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Re: LG 50PA5500 stripped...
If you moved the ribbon could you fix 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.Comment
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Re: LG 50PA5500 stripped...
No, I moved the ribbon a bit and it did not come back. I am going to carefully take some emery cloth and rub the lamination away from the copper conductors and gently reflow the area, I have spent some time practicing with a junk panel and recreated the issue with successDid I leave the soldering iron on?Comment
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Re: LG 50PA5500 stripped...
I repaired the buffer board to the best of my knowledge I haven't tried it yet the pins on the IC's incredibly close together more so than any other 1080 P panel that I've seen your must be 130 pins to this IC. Unbelievable!
http://i845.photobucket.com/albums/a...ps02a069db.jpgLast edited by freakaftr8; 01-11-2014, 04:31 PM.Did I leave the soldering iron on?Comment
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Re: LG 50PA5500 stripped...
How many buffer chips for the panel? Typically it was 90 outputs per chip (100 or 128 pins, for the control signals and Vsc/Vfo) meaning 12 chips for 1080p panel.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.Comment
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Re: LG 50PA5500 stripped...
12 buffer ic's for the panel. 6 per bufferDid I leave the soldering iron on?Comment
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Re: LG 50PA5500 stripped...
That's the same as most ones then, but check out LG's original 71" semi-prototype 1080p using IPMs, PDP71H2. 36 buffer chips total!! This is just one board. The TV retailed for about $12,000 because it was the biggest full HD plasma available at the time, almost the 1st full HD plasma too.
http://assets.shopjimmy.com/media/ca...br30771401.jpgPlease 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.Comment
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Re: LG 50PA5500 stripped...
Whoa! That's insane You probably need your own power plant just to run that beast.Last edited by freakaftr8; 01-11-2014, 07:18 PM.Did I leave the soldering iron on?Comment
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Re: LG 50PA5500 stripped...
900W rated, 1kW peak possible, powered by two 50" PDP50X1 (WXGA) PSUs.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.Comment
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Re: LG 50PA5500 stripped...
I tried to fix that cracked ribbon cable and with no success so I went ahead and heated the ribbon cable up and removed it from the screen and cleaned the contact points so now I am going to try some 3m 9703 elecrical contact tape and attempt to find a replacement ribbon cable and Adhere it to the screen. what do you guys think about that? I notice there somebody else here on the forums trying to repair a samsung lcd tv with a similar issue. I think it would work it works for iPods and my BMW instrument cluster. But I also know that there's quite a bit of voltage going through a Y sustain ribbon cable.Last edited by freakaftr8; 01-14-2014, 10:10 PM.Did I leave the soldering iron on?Comment
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Re: LG 50PA5500 stripped...
No unfortunately I put it on the back burner still sitting I eventually I have the 9703 adhesive tape but I'm still trying to find a replacement ribbon cable for it.
What a sadly overlooked design to destroy such a nice panel.Did I leave the soldering iron on?Comment
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Re: LG 50PA5500 stripped...
Agree, poor design and a shame there are lots of this model out there with this problem. I am thinking about, resoldering the broken copper traces on the ribbon cable. I have a stereo inspection microscope that I can put it under to do the repair.
Just so time consuming and the customer wants the set back yesterday.
Thanks for the detailed explanation and the pictures it was very helpful.Comment
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Re: LG 50PA5500 stripped...
Update, I was successful repairing a similar model 60PA6500-UA that had the exact same problem, second ribbon cable from the top was broken, I used very thin strands of wire and jumped the 9 broken traces on the cable.
Also replaced the Buffer I.C second from top that corresponded to the broken ribbon cable.
So it is doable, took me about 6 hours of work to get it done. The front protective glass has to be removed to access the cable.
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I have three identical-spec 820-01700 boards (2.6/32/512), and ALL THREE boards came to us with the same fault, from different sources: The boards don't wake from hibernation with the keyboard or lid, they ONLY wake when you press the power button. I understand this is a very minor issue, but the boards must be fixed!
We will of course begin with the obvious (checking lid signals), but I couldn't help but notice these three boards were all 32GB variants. Has anyone noticed an issue relating to these 32GB boards in particular? I of course don't think it's a RAM issue, but it's bizarre... -
We've now created a stack of 10 boards that have the same issue, which we suspect to be CPU-related. The issue is very simple--the board will not boot to anything, only showing the exclamatory sign inside a circle. No amount of DFU/restore, wipe/erase, etc, will resolve the issue. No boards have physical damage. We went ahead and replaced the SSD nands on two boards (one 02020, one 02016) and the issue remained exactly the same. We are considering replacing the CPU on one of the boards using a locked CPU, just so we can see if it resolves the issue.
Has anyone else run into this... -
I'm looking to upgrade several 8GB 820-00850 boards to 16GB or 32GB for personal use. I am curious what the best practice and process is for sourcing new replacement chips, and what vendor(s) you guys prefer? Another question is, how do I find compatible chips and their corresponding part/model numbers? For example, in the 820-00850 schematic, the DDR chip U2600 model listed (EDFB232A1MA) corresponds to 1x32GB chip. Of course, I would need 4x8GB chips to replace the 4x2GB chips currently on the board. How do I find compatible 8GB chips? Is it as simple as searching "BGA178 8GB 2133"...
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Hi,
I bought a mac air 2012 very cheap, because the customer didn't want to fix. After reflowing the ram chips the laptop works fine, I tested the ram and no error. But The fan goes at max speed after few seconds. Running the Apple diagnostic finds an error 4SNS/1/C0000008: Th1H--124. and the cpu usage is like 300%, After disconnecting the webcam cable that on the 2012 model is on the IO board, the laptop, the laptop runs fine, and running the apple diagnostic finds no errors. So the problem is related with the webcam, but I suspect the problem is no the webcam but the light sensor.... -
Hi friends, last week I got 3 same boards for repair (NM-D562 Rev. 3.0), same problem, power button light up, but motherboard wont start.
3,3V_alw and 5V_alw, 1,8V_alw and 0,75V_alw presented on all 3 boards, no other voltages. 1,2V missing and if I checked schematic right, I need 1,2V and than can be +3VS and +5VS generated after getting SUSP_N signal from KBC? or vise versa?
I checked for low resistance on coils, no low resistance.
Anyone with same issue like me?
Thanks for any help.
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