OK. So the problem is, that the tv wont turn on. It goes into standby(blue light) when main power is switched on, but when i press the change channel button to turn the tv on itself and to bring it out of standby it shuts down and shows no picture. When I open it up i can hear buzzing from the power supply board inside when powered on. I suspect the fault to be somewhere on that board. The board is vestel 17ips02-2. Visually trhere is nothing wrong with the board. No bad caps. I eaven tested 2 of them with my capacitance meter out of circuit(c361,c820). I also tested the rectifier and some diodes and resistors laying around on the primary side. Only problem I see is that they are problary from poor manufacturers. Then i found the schematic online for 17ips02-1.(). I started testing as the schematic. I measured the voltages from pl806 and pl807. I found out that:
PL-806
2,3 and 4 have low standby voltages. 9,11 and 12 have about 5v standby. 14 has no notable voltage. 16 has about 4 volts where it should be 12.
PL-807.
7,8 and 9 have low voltages. about 3 to 5 volts. 10 and 11 have about 5 volts.
i measured all those when the tv was in standby mode (blue light on). I presume that there wont be 33 volts on one of the outputs because the 12v supply is too low. I look at the schematic and the board and i realize that most of the components that come after ic800 and should produce 12v are small smd-s. Am i missing something in my troubleshooting logic or not? where should i go on?
i have also attached pictures of the board and the tv.
PL-806
2,3 and 4 have low standby voltages. 9,11 and 12 have about 5v standby. 14 has no notable voltage. 16 has about 4 volts where it should be 12.
PL-807.
7,8 and 9 have low voltages. about 3 to 5 volts. 10 and 11 have about 5 volts.
i measured all those when the tv was in standby mode (blue light on). I presume that there wont be 33 volts on one of the outputs because the 12v supply is too low. I look at the schematic and the board and i realize that most of the components that come after ic800 and should produce 12v are small smd-s. Am i missing something in my troubleshooting logic or not? where should i go on?
i have also attached pictures of the board and the tv.
Attached Files
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