tv cce modelhps-2991fs no video no sound
buddy: that mod, it appears as a tube tv ... you can specify that it is (the bristles light well) and the heart thing refers to the filaments of the tube ... (heater) ... it is in 2.5v .. .comment q, voltage of + b you have in C825 of 100mfx160v ... and comment if you have lighting in the tube or TRC ... and see if the filaments light well ...
Cheers!!
Hi. The question is if everything is ok because it does not go.
You should comment on all the tensions so we can give you better help.
As scrin tension. Chroma (in each of the 3 cathode KR-KG-KB) ABL voltage. Yes our OSD. If you feel high tension. More data better. I did not forget the chasdis N *
if you're right nicomena I meant filaments ignite, what happens that in my region we call it bristles but you're right here you have to define things by their specific name, well back to the subject, if heater is at 2.5 ac, if the filaments ignite in fact the screen lights up in blue and the characters are shown as volume bar, channel change and menu
ok nicomena in the tuner the voltages 5v and 33v are present the voltages of the pins of the ic101 34 = 1.5v and 39 = 7v on the pins 59,61,66 = 3.5v the filament tension you mean heater what measured current acv greetings
if the tensions seem to be fine in the micro a little under the 8v ... now enter the menu and go to the video option and connect a dvd in the video input of the tv and see if it appears on the screen ... It is necessary to know if the microphone is running ... and also in the menu look for the blue screen option and remove it to see if a white screen appears with rain ...
nicomena already connect a DVD and there is no video or image I have already entered the menu and remove the blue screen and the screen is black there is no sparkle in the image
if you removed from the menu the option blue screen should not be black or dark screen ... look up the contrast and brightness and see if the screen illuminates something ... measure on the cathodes of the tube R902-R908-R914-q, voltage you have ... you must walk in the 150v (approx) ... measure on pin 8 of the fli-bak q, there is voltage .... take a little tension on the screen on the potentiometer q, is on the bottom of the fli-bak and see if it illuminates something the screen ... in the diagram there is a service key SW708 move it and see that,
effect does ...
look or measure if you have 200v voltage on the C420 ... it comes from pin 9 of the fli-bak ... goes to (R fr422) (D408) and (C420) ... you don't comment on the cathode measurements that , I suggested in R902-908-914 ... measure on pin 8 of the fli-bak ... ABL q, there is tension ... comment measurements on the cathodes of the tube ...
Hi. Who does not read what one suggests or does not know how to measure tensions?
Don't take it badly but one wants to help you and you don't do your part. Remember that we are behind a PC or cell phone. Through the Internet. I already asked him things and he didn't answer. Now the colleague asked him again. And does not respond. Your report is essential.
For me, if the problem may be in the circuit ABL-chroma voltage bad- or bad tube. worst case micro or micro jungle bad.
nicomena in the capacitor c420 there are 213v and in the r902, 908 and 914 there are 198v abl there are 154vac, what do you suggest
Mr. Luis with all due respect if you do not know what people are going through problems with internet failures please refrain from making those unhealthy comments thanks
do not take the comments of colleague Luis ... just try to help ... is his way of commenting ... I don't know if I understand correctly but you say that, in ABL there is 154vca ... that voltage where you are taking it in pin 8 of fli-bak ... comment ...
friend: I don't know if we are in different schemes but the one I have in sight is cce-hps2991fs ... and it can't have 154v on pin 8 of fli-bak ... I don't know where that tension comes from ... at most I would see 8-15v .... measure on pin 54 of the micro tda9873 and you see that, there is tension there ... then you highlight a leg of the R423 and measure again on pin 8 of the fli-bak. .and you see if it continues with the 154v ... also the tensions in the cathodes are very high 198v .... they must be (approx) in the 150v ... it seems to have prob, of fli-bak ... comment this test ...
nicomena I checked again the volls abl and in patica of the r423 there was 13v measured that voltage wrong previous mind sorry
well but measure back on pin 8 of fli-bak ... see what tension you have there ... measure pins 55-56-57 q, tension you have ...
ok ... now I am wrong ... measure on pins 56-57-58- q, correspond to the video outputs q, go to the video amplifiers in the tube ... if they are in 0v there is the prob, there is no output of 2.5v (approx) to polarize the amplf, video ... let me, check the scheme..ok..x that is so high the tension of the cathodes ... something is wrong in the micro ... see ... ok ..
nicomena I was checking well and when I put menu in the background you see the faint image
nicomena I was checking well and when I put menu in the background you see the faint image
nicomena I was checking well and when I put menu in the background you see the faint image
friend: it can be prob, from the ABL ... on pin 54 you should see some tension but you have almost 0v according to comments ... you highlight a leg of the C213 of 10nf and C416 and see if either is leaking or short .. .review the D402 and see if it is in good condition ... in its cathode I must have about 12v ... the year of the D402 goes to pin 54 ... if there are no changes you highlight a leg of the R418 and see if there is any change ... you have moved the SW708 service key as I suggested previously, go to pin 78 of the micro ... there is some change ...
no, actually, I have not moved the little key, I miss it, I am going to check and tell you my friend
Hi. You took my comment wrong and I told you that I did it with the best intentions.
But notice that it was positive.
Because the job of measuring and commenting on them was taken, that should always be done. This way you get better help. And we all row in life.
213v for me is a lot.
154v in ABL. it was clarified that he was wrong to measure. It measured it as written in alternating current. VCA which is not the same as VCC or DC. direct current. We'll see what happens when you move that service key. Well guided you are by colleague Nico whom I greet
Hello colleague Luis ... thanks for your compliments ... you deserve the same compliments since, years ago, you are helping to give solutions ... it was only one among the said q, usually happens sometimes when you do not find a Quick a solution ... I apologize on my part and the colleague I think you will understand ... the TV is a bit confusing ... I hope to get it forward if it is, has no prob, micro ... greetings ...
good sir uis thousand apologies the truth for my comment, I really thank you as much as you and as nicomena well returning to the subject since today I could not do anything because we had power failure and a few minutes ago it was tomorrow I will be telling you thank you for understanding me friends
Hi Nomenomena and Mr. Luis I was reviewing and performing the tests that he recommended me and it was the following, I desolde the patics of the c213 nothing happened without voltage even the c416 does not find it or is not in this plate but in the diagram it appears, the diode 402 neither it appears just like the sw708 key i don't know what to do anymore
me: you have commented that, when entering the menu the image looks very dim ... and when you leave the menu you can see nothing ... or you see something ... you did not lift a leg of the R418 ... download a Little screen to see if you see something of imajen and if it changes channels ... you highlight a leg of the R418 ... and see if there is any change ... if there are no changes the weld again as it was ... .function the contrast ... measure on pins 56-57-58- q, tension do you have ... on pin 54 follow on 0v ... measure on the socket of the tube on the D901q, tension do you have ... is a 8.2v zener ...
friend: the OSD is doing well ... but you do not make any measurement at the points that I suggested in the previous comment ... read a little leg of the R418 and you see what happens ... if nothing happens solder again instead ... take an R of 10kohm 10,000ohm (brown black orange) connect a tip to 3.3v in the positive of the C706 or in the positive of the C851 and the other tip of the R of 10kohm welds a cable q , you can touch pin 54 of the lc101 or micro ... (eye) just touch pin 54 and see if it appears imajen ... if you are not sure do not do it ... ok
be careful not to make any short with the pin next to it can damage the micro ... apparently there is some prob, with the micro lc101 TDA9873 ... or there is a prob, with the ABL ... comment if that is the micro q, take ... comment if you understood what, I explained before doing this test..ok ..
nicomena if I understood I will do the test and tell you. Mr. Luis, I'm not in control, or another tube
Nicomena check the first part that I had not reviewed desolde the patience of the r418 and there was no change what if you notice that in the diagram it tells me that the r415 and r416 must have -13v in the r416 there are only -8v and the the r415 0.0v you tell me
nicomena I already did the 10k resistor and I played the ping 54 and if I get an image to the TV, is that the micro damaged?
no, it must not be that the micro .. is damaged, and when connecting the R of 10kohm to pin 54 appeared imajen ... leave it soldered to pin 54 and comment if all the channels are seen well ... meanwhile I look for the diagram and I see better xq, it lacks tension on pin 54 ... don't change anything ... ok ... comment on how the TV is doing with that R of 10kohm connected to pin 54 ... ok
the R415 is attached to the emitter of the Q404 and x the emitter of the Q404 enters the 13v ... take voltage on the emitter of the Q404 and see if the voltage of the 13v is ... the Q404 is a pnp and the Q405 is an npn ... x the doubts lifts na leg of the R428 of 22kohm q, goes to pin 34 of lc101 ... and you see that, effect does ... the E415 is 10kohm ... look if it is not open .. .
well leave it connected that resistance from 3.3v to pin 54 ... I do not have just that scheme but if it goes well leave it like this ... q, that solution is well ... be careful do not go to make a short between pins ... well buddy x at least give me 2 points in the score box devajo of my first comment since, it cost a lot of work to find a solution and .... (solution accepted) ... "congratulations" and even another opportunity. ..Cheers!!
ok brother thanks a lot of thanks you don't deserve 2 points if not 100 points for the patience and dedication about this repair you are an excellent technician god bless you what you know.