Re: Sourcing replacement backlight SMD LEDs or Strips (LG panel)
Happy new year guys!
I found this thread and thought I would share my experience.
Someone handed me a not-very-old LG TV (42LB5610) with sound and no pic. Sure enough there was a trace image visible using the torch (flashlight) trick. I informed the owner he'd be unlikely to see any change out of €100 to fix it. So he asked if he was due me anything for looking at it and off he went to buy a new one.
Now it's nothing fancy but it would still be nice to get it going again, so I had a proper look and to my surprise I discovered that ALL 32 backlight LED's are short-circuit. What also surprised me was that on the PSU there is a label listing the output voltages; the usual 5 & 12V rails and one at 200V. Now when I was at school, 32 (LED's) X roughly 3V would be 96V or thereabouts. So were these 6V LED's?
Well after a quick search on the eBay page mentioned above (thank you @cmg) it would appear so, there are several 6V LED's listed, one specifically mentioning LG 'Innotek'.
So it looks like this set won't be seeing landfill for a while yet. Replacing 32 LED's and then sticking the plastic lenses back on will be a "when I've nothing better to do" job. I've not done much with SMD's having pretty much given up repairing TV's when CRT's were still popular.
Happy new year guys!
I found this thread and thought I would share my experience.
Someone handed me a not-very-old LG TV (42LB5610) with sound and no pic. Sure enough there was a trace image visible using the torch (flashlight) trick. I informed the owner he'd be unlikely to see any change out of €100 to fix it. So he asked if he was due me anything for looking at it and off he went to buy a new one.
Now it's nothing fancy but it would still be nice to get it going again, so I had a proper look and to my surprise I discovered that ALL 32 backlight LED's are short-circuit. What also surprised me was that on the PSU there is a label listing the output voltages; the usual 5 & 12V rails and one at 200V. Now when I was at school, 32 (LED's) X roughly 3V would be 96V or thereabouts. So were these 6V LED's?
Well after a quick search on the eBay page mentioned above (thank you @cmg) it would appear so, there are several 6V LED's listed, one specifically mentioning LG 'Innotek'.
So it looks like this set won't be seeing landfill for a while yet. Replacing 32 LED's and then sticking the plastic lenses back on will be a "when I've nothing better to do" job. I've not done much with SMD's having pretty much given up repairing TV's when CRT's were still popular.
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