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The chances of the large cap in the hot side of the power board being bad are almost non existent, that part very seldom fails. test your PSON voltage after the set has shut off and see if you have about 3 volts there, if you do then the main board is working ok and its in the power board, next thing to test is if the power factor correction is working, if its not working correct then look at components in the hot side of the power board, if you see PFC working ok where the voltage of the large filter cap rises to just under 400VDC when the set powers on then look at issues with the cold side of the power board, remember when testing the hot side you can not use chassis ground, the low side of the bridge rectifier must be used as the ground ...good luck!!...other option if you determine you have power board issues is to replace the board verses service it yourself, some power boards can be kind of spendy though where they can usually be fixed for a few dollars.
Hello, i have a sony FD Trinitron WEGA #KV-36FV310 ... Need to know whichoptocoupler ic is used in str 6267 based power supply in sony trintron crt tv.
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Need to know which optocoupler ic is used in str 6267 based power supply in ... My sony crt Tv totally dead when touch any components and the IC strs6307 ...
Fault with the main power supply regulator board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. http://electronicshelponline.blogspot.com/ It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge) More to say, most of the spare parts to it will be difficult to get from open electronic spare part market. This is true to most of the flat panel TV power supply boards; irrespective of its brand and screen size. {There is no such tools to send to you to get it repaired ONLINE}
Fault with the main power supply regulator board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. http://electronicshelponline.blogspot.com/
Check its main rectifier diodes. If any of this is shorted, this type of fault can occur. More to say, when you repair power supply regulator board, you should check all the other components too for damage. google.com/+GopakumarGopalan
i have a 40 inch sharp tv an the red light keep blinking, the power light,it will come on with the gren light abount on for 1 minute then go off no picture.help
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