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TVs

ww white-westinghouse md.www-521 does not start

osbal
osbal
34
hace 5 años
hace 5 años
The chassis is PTFMO2 after changing the str 5707 the power LED turns on and off and the TV does not start can someone give me a little help to find the drama, thank you and I will appreciate.
nicomena2015
nicomena2015
9.501
hace 5 años

hello: when you give power you have in the C821 and C822 the 135v of the + b ... they arrive at pin3 of the fli-bak ... it has optocoupler or not ... q, you have a micro jungle ... there are several versions of ptfmo2. ..

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osbal
osbal
34
hace 5 años

Hi there is no octocoupler, the jungle is a la7685j and the micro is a ks88c3116-28, but the 135v as an indicator and stanbay lit with more than 200v and the voltage dropped to nothing, what do you think, I would appreciate your opinion, thank you.

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nicomena2015
nicomena2015
9.501
hace 5 años

hello buddy: where did you take that voltage ... look or measure on C821 and 822 that's the volatje of + b ... and I should be at 135v ... and if that voltage you took it at C821 or + b .. .this very past voltage ... you can have prob, in the primary of the source since q, you say q, has no optocoupler ..ok ..
change the C811 of 220mfx25x ... also change the C810 of 10mfx50v and the C815 of 4.7mfx25v ... to make a measurement of the source voltage raise a leg of the L822 and the R821 q, go to fli, bak .. and charge the + b with a 60w lamp between the positive of the C821 and mass ... and you see what tension you have in C821 ...

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osbal
osbal
34
hace 5 años

Hello colleague: I followed his recommendations to the letter and dragged jewel with 135v, but the saddest thing is that I put the cable and I have no image, look for the channels when pressing any tur, measured the sinto and I have the 33v and other tensions check The tur because they could be resentful but it is not like I enter the menu and do anything, I suspect the memory, you can give me your opinion, I do not have the remote, thank you.

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nicomena2015
nicomena2015
9.501
hace 5 años
hace 5 años
good colleague I'm glad that the TV is on well ... but if no channel enters and you can not enter the menu it can be damaged memory ... provoked by A / V or video if there is image ... as the rainy screen ... try to test with a c, remote and put it in automatic programming and see if it memorizes the active channels ... disconnects all the swith of the keypad can be some making false contact ... the OSD does not appear in screen ... if even with the c, remote does not program the TV ... again to change the eeprom with the data of that model ... the original guardian can serve you later ... greetings!
osbal
osbal
34
hace 5 años

Hello colleague, if you have osd but connecting a dvd by video there is no image, I will send another message to see what happens and I comment.

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nicomena2015
nicomena2015
9.501
hace 5 años

Before changing the memory, look at the ABL pin 8 of the fli-bak and check the R481 of 68kohm if it is not open ... it is connected between the + by the R482 q, go to pin 8 of the fli-bak ... this line from the abl it arrives until pin 14 of the la7685j ... it measures in pin 14 deven haver 6.2v ... given that, if you have osd there can be some prob, in the line of the ABL ... measure that, tension you have in pin 8 delfli-bak ...

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