TV LG RZ 29FB51RX no picture.

[pradeep.g.belchada]

are you conected the deflection yoke conector. which you disconected earlier.

 

[piotrekn95]

Yes I connected everything.

 

[pradeep.g.belchada]

ok now check 28volt on diode d413 (RGP15g) conected on pin5 of fbt check on r421 2.2e it should be exact 28volt.
& check ac voltage on pin10 of fbt keep dmm in ac mode measure the voltage & report here.

for details see the schematic

 

[piotrekn95]

You're genius.

I checked d413 diode and there is 0V. I'm going to check that diode outside fbt.

 

[pradeep.g.belchada]

check the voltage at junction of capacitor c436 & d413, & 100e resistor should be conected to the on/off pin of ic sda5555 which i described
above

 

[piotrekn95]

There is 0V, also 0V on R421.

Do you think it could be KIA4558 or transistor broken?

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Also 0V on C416.

 

[pradeep.g.belchada]

find the below point voltages
1) find voltage on gate of mosfet q401 irfibc20g & drain of the mosfet q401
2) find voltage on both side of resistor r407 820e
3)find voltage on fbt pin no.2 b+ it should be 150v
4) pin 32 of ic sda5555 check voltage

give your reply ic kia 4558 is a abl limiter it has nothing to do with the problem

 

[piotrekn95]

1) Gate of Q401 has 8V.
2) Resistor R407 has 67,5V
3) B+ has 134,6V
4) pin 32 od sda5555 has 3,3V

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drain of mosfet has 0,1V, source =0V

 

[pradeep.g.belchada]

d

drain of mosfet has 0,1V, source =0V

drain should be 60v check driver transformer t401 check the continuity of winding on primary & secondary side

- - - Updated - - -

also check q401 i think it may be short

- - - Updated - - -

also check voltage on pin 23 of ic ddp 3315c or at base of transistor q505 and also at base of tr q506

now i found their is a problem in ddp ic or sda5555