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Vizio E321VL dead blown fuse help
silva1955:
Hi guys; i have a Vizio E321VL dead with blown fuse,can you please advise on what other components should i check before i replace fuse and turn it on?i checked some of components on the board and there are 4 mosfets 2 of them see pic, i circled the 2 mosfets kf5n50 that test short in circuit,don't know if these are bad!any help would be appreciated.
downunder:
The two FETs (circled) will be toast. Check the main regulator STR-W6053 for shorts as well as the bridge rectifier below the fuse for shorts.
If the dead FETs are on the cold side of the power supply, I'd say they've merely failed. Replace them and in place of the fuse, substitute a 100W 240V
lamp. This will protect the components against failure if other problems exist. If the lamp lights up brightly when mains is applied, you still have problems.
Bruce
silva1955:
--- Quote from: downunder on March 21, 2017,02:42:35 ---
The two FETs (circled) will be toast. Check the main regulator STR-W6053 for shorts as well as the bridge rectifier below the fuse for shorts.
If the dead FETs are on the cold side of the power supply, I'd say they've merely failed. Replace them and in place of the fuse, substitute a 100W 240V
lamp. This will protect the components against failure if other problems exist. If the lamp lights up brightly when mains is applied, you still have problems.
Bruce
Thanks Bruce;i'm trying to find STR-W6053N,regulator KN0N60,and Mosf KF5250, and i can't find them anywhere.
--- End quote ---
downunder:
Don't know which country you're in, silva, but UT Source (China) stocks them, cheap as chips, lol. I've been very happy with their service. You don't have to buy in bulk, just ones or twos, but there is about 10 days delivery time. And they use Paypal. Bruce
silva1955:
--- Quote from: downunder on March 22, 2017,02:26:56 ---
Don't know which country you're in, silva, but UT Source (China) stocks them, cheap as chips, lol. I've been very happy with their service. You don't have to buy in bulk, just ones or twos, but there is about 10 days delivery time. And they use Paypal. Bruce
--- End quote ---
Thanks Bruce;i'm in USA.
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