tv philips chassis L03.2L AA does not turn on missing frequency TH
I send you a vpp probe diagram. This is placed in the collector of the Driver, you connect it on and check if you have vpp, the probe has to be placed because the measurement will only be an instant, if you have vpp in the driver, you place it in the base of the hot. For greater safety, this can be done by removing the fllyback and the hot, connect a b + charge to ground, this so that the fluent has a charge. regards.
With this probe it is possible to check the flyback in the circuit, only that you need an external source no larger than 50vcd. - If you like we have another one that we use for a switched source and check the flyback arriving with an external source at 80vcd. Cheers
this chassis works with 97v in the + b C2564 ... it is advisable to change the C2564 from 100mfx160v ... and C2561 from 2200mfx25v ... because if the voltage is less than 97v it is detected by the protection and can cut the horizontal excitation .. .review source ...
friend nicomena2015 already the filters were replaced equal 94v + b, now those -12v come out of the flyback ..? being that way the tv does nothing there is no excitation hor when giving power nothing arrives at the base of the hot and the flay is not excited to generate those -12v, I will carefully review that stage
agree colleague; but the voltage does not reach 97v ... I don't know if the voltage of the 94v is in stand-by or is when giving power ... you have to, have the voltmeter connected in the + b before giving power and see q, voltage you have in stand-by and then without taking your eyes off the voltimtro see aq, tension raise the + b when giving power ... also try to ensure if when giving power the hor excitation comes out, from pin33 of lc7200 ... s you don't have a voltmeter frequently borrows one from a colleague ... ok ...
Good morning, colleague if I had mentioned it before, the 94v is in stanby when giving power goes up to 95v and by pin 33 of the ic7200 when giving pow a 1.0v voltg comes out as x two seconds and back to 0v but that voltg did not reach The base of the hot in the 7422 I have is 1.5v in collective nothing more and the 7423 1.5v in collective and issuance base, they do not carry the 6v that they indicate to me by reviewing the vaud line of dond comes the 6v I have 9v until the entrance of the R3425 in his other output pin he gives me the 1.5vq they arrive at 7422 and 7423 greetings
if at the entrance of the R3425 you have 9v at the other end of the R3425 you should have 6v ... q, go to the emitter of 7423 ... check if the R3425 measures 330ohm q, says the scheme ... check the C2428 if it is not leaking ... measure transistor 7423 if it is in good condition ... or short ... saves measure a transistor pnp no ...? ... the voltage of the Vaud on the emitter 7423 drops a lot ... check those components one x one at the stage of the exitador hor, ... something is wrong there ... the excitation signal looks like q, it comes out of pin33 but it falls maybe xq, the hor does not start,
Friend nicomena the r3425 marc sus 330ohm the filter c2428 was changed, but the 7423 is short between collector and transmitter as you indicated now that transist is smd has 58w printed code and I do not have that teng code with other smd so it can be replace or you can put one other than smd greetings coleg
colleague: the 7423 is a pnp transistor ... if you are sure that q, it is short ... (measure well) you can replace it with one that is not smd of three pnp terminals ... you can try the encapsulated BC557 TO- 92 ... looking straight ahead with the terminals facing down, the first one on the left is a transmitter ... the one on the middle is a base and the one on the right is a collector ... you have to know on the board which is a transmitter-.base - and collector in the original TV smd ... if not you will not change ... you can not go wrong ... greetings!
If friend replace it by an equal one there is already a hot swing but I burn the hot immediately
If friend replace it by an equal one there is already a hot swing but I burn the hot immediately
If friend replace it by an equal one there is already a hot swing but I burn the hot immediately
Ok but for easier I will reeplz the doom first the 153j / 1600v but I have no equal I will put a 123j / 1600v and buy the hot
Ok buddy and replace the 153j with the 123j and put the hot C4460 for not getting the original, I proceed to turn on the TV with a serious set in the + b removing a jumper and instead put the two bombill one of 100w and 60w in Stop it because with a single one I did not turn on, when I actually gave power to the TV I turned it on for about an hour to see if it reheated the hot which had normal temperature now when not heating I proceed to remove the series and give power and turned on the TV but after 5 seconds the + b goes out in 96v, colleague this tv is more cumbersome is repaired and another problem appears, greetings ..
colleague: the C4460 is not to put in the horizontal output ... it is a transistor for switched sources ... its maximum voltage is 500-800v ... in the horizontal output there is q, put transistor 1500v-60w .. .the C4460 is going to be shorted because it is not for that function ... it puts a replacement of the BUT11APX ... without internal damper ... the possible replacements are ... BU2520AF / AX-- BU4508AF / AX ... .BU1508AX - BUH515XI ... D1887 ... some of these are larger but you have to close the terminals so that they fit on the board ... comments avanses ..
Friend I do not get original hot I put the d1554 with dampe just remove the r3426 and the diode 6422 the tv turns on but it still goes off solder pin 36 of the jungl just goes off if you press pass channels it stays on but when you release it it goes off no longer chnce enter service mode to see what error threw, greetings colleague
hello: you can have the tube somewhat clogged ... look at the plate I must say with what, voltage works the + b ... in the scheme says 97v in C2564 ... change the C2444 of 470mfx25v ... is trying to move the poten of the screen go slowly until q, you see lines of delay you return until q, disappear ... and see if it does not turn off ... you changed the C2564 of 100mfx160v ..? ... if it is still turning off we see a little tension in the filament ... or adapt the ik if it is q, you can in that model ...
Well on the board does not mark voltages when it turns on it looks good clear and bright and correct image since the c2564 and the c2444 have already been changed now c2564 has is 47UF / 160v not 100UF and also has moved the scren in several points and nothing turns off
colleague: try to cancel the IK circuit with three diodes 1n4148 as it is in the image q, I leave you below ... look for three diodes 1n4148 soldered together the three cathodes the anodes go one at the exit of R3619-the other year goes to the Exit of the R3620-and the third year goes to the exit of the R3621..ok. as it is in the diagram ... the cathodes of the three diodes you already soldered together and now you solder it to the pin50 of the jungle .. .new and comment if you are going with this change ... below image so that you can guide yourself ..
https://ibb.co/hcyQx9
Well, colleague was already making his suggestion but it occurred to me to change the condenser that had already replaced the 123j / 1.6v with one of 13n / 2000v and turned on and did not turn off but the hot this TV is overheated is an odyssey greetings colleague
colleague: these tv have q. be all the components as it comes from the factory ... if not it will not work well or goes out ... they are very sensitive to any change of components ... that is the prob, of the philips tv ... puts in the stage hor, the capacitors q, are indicated by the factory or those indicated in the scheme ... if you have changed any notice that you replace it with the same capacity and voltage ... maybe you had to leave the R3426 and the diode 6422..and put a transistor hor, if damper ... see if you can lower the screen a little and see if it warms less ...
greetings colleague, I got the original hot but11apx I reassembled the r3426 and the diode 6422 and left the condemner 2423 13n for not getting more and replace the other condemned 2424 with another equal I proceed to turn on and once again I burned the hot I don't know if quality or some failure of the TV but I have already checked almost everything, so I decided to reassemble the c4460 and that with the ignition without burning it, I put a larger heatsink to test ignition without problems I left it on x 6 hours and it was a hot little hot but not turned off or burned the temperature is tolerable
colleague: you have measured the diode 6422 in imbersa and live ... and see if it is not leaking ... or is open ... the diode 6422 is the damper or damper ... same q, the q, bring the transistors with internal damper ... the c4460 is for (500V / 15A Switching Regulator) is used in switched sources ... it may work 6 hours but it will not last ... if the 6422 diode is well leave it connected as it comes from the factory and the R3426 and see if you get the D1887 q, it is for 1500v and 70w ... without damper ... the c4460 as you are using it with diode 6422 and R3426 connected on the board ...
If colleague I dial 420 on one side and nothing on the other and the c4460 if with the r3426 and the diode 6422 connected on the board and as I do not know what else can be and chose to continue using the c4460 the hot ones are too expensive and Ma burned two but11apx colleague
colleague got the d1887 and it was mounted and turned on but just like the c4460 heats up to a tolerable temperature all his voltes are fine they are not elevated on Friday I left it all day on without problems I will proceed to deliver it to the owner and there is no way put q hot less or do not know if that is your working temperature I have a samsung k51a q works perfect its fault is tuner but it has a hot q is not the original but do not remember the number, what I want is that this tv also heats up quite a bit the hot only changed the tuner and entered the owner
