Would someone please help troubleshoot a Vizio 47" TV Switch Mode Power Supply with 5 volt output fluctuating voltage. The voltage fluctuates at 5 the volt output and at the Pulse Switch Modulating IC at VCC. I have the following notes:
1. The 3 main filter caps all have approximately 167 volts steady
2. I have replaced 4 mosfets next to what I think is called the inventor transformer (big black transformer) pictures attached
3. I have replaced Fuse F102 with an equivalent
4. I have check all diodes and caps and they seem to be ok
5. I replaced the 431 chip at U201
Pictures attached for reference
thank you for your help!!
1. The 3 main filter caps all have approximately 167 volts steady
2. I have replaced 4 mosfets next to what I think is called the inventor transformer (big black transformer) pictures attached
3. I have replaced Fuse F102 with an equivalent
4. I have check all diodes and caps and they seem to be ok
5. I replaced the 431 chip at U201
Pictures attached for reference
thank you for your help!!
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