tv mastertech model = 21f1c with color failure
hello manolo thanks for your answer
If I check the large resistances that are 15k and it is good to check the jungle, the welds are sharp, just like that of the f and all those that are in the insert without finding any altered, what I have doubt is the voltage that I measure in the cathodes of colors since in the blue and red cathodes I have a voltage similar to 140v but in the cathode of the green color I have 194v tell me if that is right or wrong
friend. it may be the socket that is sulfated inside and you checked the transistors
check the socket I gave a sandpaper to the pins and it turns on normally after a short time the transistors are put back on purple screen only I measured them that they were not short to see if they do not have leakage will I have to remove them completely ???
the chassis is the ph08k n35
And my doubt is the voltage that reaches the normal cathode of 194volt since only one voltage reaches the other two does not exceed 140 volts
thanks for your answer rhonny if I already measured those 3 resistors are in 100 omns today buy the transistors according to diagram with the code v911 v921 and v931 there are not the same but an equivalent are c2230a but right now I see that your data sheet is not the same
Do you think that those that I bought according to the data sheet are the ones that the c2482 brings from the factory support 300vols between emitter and collector
I bought c2230a only support a maximum of 180 volts between transmitter and collector will be that they serve me or I made a bad purchase I ask before putting them I do not want them to burst when I put them
With regard to the question of the tapping I already did it and it does not make changes, it just throws me a normal screen when I turn on and after a few moments it turns yellowish then it changes to red and then it turns yellow again and then it stays there
In the tube plates of Chinese televisions they usually bring transistors that replace each other.
It only ensures that they coincide in their collecting and issuing base. measuring with multimeter remembering that the emitter measures a little more than the collector when measuring in diode scale.
And the diode is that rectifies the 180v is close to the Flyback. It is linked to a 250v filter. that you should have already changed it.
thanks for your proposal rhonny after extracting the amplifiers and measuring them giving a state of being good I proceeded to replace them I found a TV with 14 transistors c3207 and I soldered them to a small plate and turned on the TV and it's ok if color failures will last I put oo
do not