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Old 08-17-2022, 03:10 AM
ronl ronl is offline
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Join Date: Jun 2014
Location: Surrey (near Vancouver) BC Canada
Posts: 156
Hi Members.I replaced all 9 defective leds with salvaged backlight leds from a junk set.I found it easier to use a heat gun to install leds instead of a soldering iron.all leds work now with my external power supply,but the strange thing is that the led array still draws too much current.at 151.8 volts,current draw should be 425ma.its around 600 ma. Of course,the power supply does not like that and pulses on and off.Is there big differences in voltage drop and current draw between different backlight leds?I assumed they were all approx 3 volt across them when conducting and drawing simular current? The original led backlights were from a 2016 tv and the replacements come from a 2020 tv.both Samsung and both have very similar looks and construction.any ideas? Thanks RonL
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Source of free vintage Canadian tv service info.Caretaker of various 1920 to 70s radios,a Farnsworth 651p tv,a RCA Ctc5 and a few 50s tvs.
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