Question about Vizio L37 Television
Power Supply repair is NOT easy, but here goes. First Without Power do as"Dry" Multimeter Ohms, check of ALL discrete components looking for "Shorts" Check, Diodes, Caps, Resistors. Coils etc.., Check all Transistors, B.C.E. with your meter set on "Diode test" look for "Bad" junctions. Then you check to see if you have power to and on the "other side" of the Bridge Rectifiers/Diodes. if not, replace that. if yes, proceed. Check for the correct Voltages around the Controller Chip. and Check the output of the Chopper Transformer, Check to see if the Waveform around the Controller IC is right. Check ALL voltages are correct & within range.. Now during this you should have found the faulty Bit(s). Replace as necessary. BE CAREFUL. I always work on ANYTHING connected to mains through an Isolation Transformer.
Posted on Feb 03, 2010
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Posted on Jan 02, 2017
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