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Tube TVs

Tv Phillips without voltage the trc filament

Johnny Rivero
hace 5 años
hace 5 años
Good friends tv Phillis model 21PT6341 / 44 chassis L03 11AA the same turned on without problems only very low audio, why change the C2444 and from then on the problem started, the tv does not turn on even if it reaches high voltage to the screen but there is no voltage in the filaments of the trc, check the diodes and resistors and they are good, in the capacitor C2444 there are 8 volts but from then on they are lost and I cannot find this fault and the 160 volts that must also reach the trc do not appear, since I have two days and I do not achieve anything with the diagram. I thank you for your valuable contribution in solving this headache ... Thank you in advance for your valuable help ..
dni20
dni20
1.120
hace 5 años
hace 5 años
When I change the 2444 notice that a very thin track that goes from the + of the filter to the left of a smd resistor with the number 222 ... has not been cut.
Johnny Rivero
hace 5 años

Thank you, friend dni20, I have already reviewed it and it's ok ... I will do a re-check anyway ... grateful for your input ...

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Javier Chavez C
hace 5 años
hace 5 años
If you do not have the filament voltage or 160v it gives the impression that there is no oscillation, therefore it no longer generates its working voltages, if it was all due to the capacitor, being this one of the characteristics of the original, verify that it is placed in your correct polarity and order in the circuit. This filament voltage plays a very important role in circuit work. Diagram here. L03.1L AA TV PHILIPS.pdf [11.30mb]
Johnny Rivero
hace 5 años

Good friend Chavez thanks for your response, but I tell you that when I send the ignition order the screen receives its high voltage that goes from the flyback but I do not have the voltages on the trc board (there is no voltage) as I know if there is no oscillation to check, an easy way since I don't have an oscilloscope

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Javier Chavez C
hace 5 años

Placing a focus (70w / 100w) between + B and the + B input pin of the FBT. Previously cutting or dividing said track to place the focus on both points of the cut track

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Javier Chavez C
hace 5 años

In normal operation to the ON command the spotlight will illuminate and remain on until a new shutdown order is made.

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Johnny Rivero
hace 5 años

Thank you friend Javier for your valuable response, in fact there was no oscillation since the track (very fine) that goes to smd resistance marked with a 222 etaba abiarta between the c2444 she there was the fault ..

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Javier Chavez C
hace 5 años

Congratulations !!!

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