Hi guys i found the Lg tv in the curve completely dead, checked power Supply board and no voltages anywhere,no volts in the primary side or secondary side,no volts 3.5v,24v,12v,i checked mosfet q101 and is good,fuses are all good also checked all components that i could check with my fluke and cap analyzer and all seems to be in order,so it seems to be a mystery . Any help will be appreciated to save this tv from landfill.
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LG Led TV 32LN5300UB Completely Dead
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Re: LG Led TV 32LN5300UB Completely Dead
What was the meter set to? AC or DC? Looking at your last picture you are checking the voltage between the fuse and ground. You need to check the AC voltage across Line and Neutral. Not Line and Ground
Just check the DC voltage ACROSS the main filter capacitor. It should be 160vDC. Then with the board un plugged from ac, check the resistance of R113, it should be about 0.15Ω
When checking voltages in the Primary, you must reference HOT Ground (C110 negative leg)Last edited by R_J; 07-09-2021, 09:54 PM.
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Re: LG Led TV 32LN5300UB Completely Dead
Originally posted by R_J View PostWhat was the meter set to? AC or DC? Looking at your last picture you are checking the voltage between the fuse and ground. You need to check the AC voltage across Line and Neutral. Not Line and Ground
Just check the DC voltage ACROSS the main filter capacitor. It should be 160vDC. Then with the board un plugged from ac, check the resistance of R113, it should be about 0.15Ω
When checking voltages in the Primary, you must reference HOT Ground (C110 negative leg)Last edited by ivtec; 07-10-2021, 12:17 PM.
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Re: LG Led TV 32LN5300UB Completely Dead
Originally posted by R_J View PostAre you sure you don't have 3.5v on the secondary side?Last edited by ivtec; 07-10-2021, 04:06 PM.
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