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LCD TVs - LED
SOURCE BN44-00498A from samsung tv does not deliver tensions
21
hace 5 años
hace 5 años
The TV was no longer after lightning. It has the 5 v in standby but does not deliver the 13v and also in the comb that goes to the LEDs D1 +, D1- does not deliver any voltage, that is the problem is in the secondary (COLD) because in the HOT if I have tensions , even in the large capacitor. Where can I look for the fault? [img/png/bng/bng/png/bng/png/gng/png/gng/gng/gng/gng/png/gng/png/gng/png/gng/gng/png/gng/png/gt/gng/gng/png/gt/gng/gng/pngver-adjunto/aHR0cHM6Ly9jZG4ueW9yZXBhcm8uY29tL3VwbG9hZHMvZGVmYXVsdC8wMDAyLzg4LzItNzQxMy5qcGc=] 2.jpg [100.55kb] 3.jpg[93.27kb] 7.jpg [96.96kb]
2.jpg [100.55kb] 3.jpg[93.27kb] 7.jpg [96.96kb]
13.721
hace 5 años
hace 5 años
Hi Francisco, with your permission. Walter, Tabupirata, when the standby of this source starts charging with tension the capacitor cs805 would be the first measurement ...
With the source disconnected from the main, the current flowing through RS852 causes QQ852 to saturate and polarize to the diode of PC802 in this way its transistor conducts polarizing the base of QS801 this will reflect in the emitter the voltage that is in CS805 at that time you would have to have VCC in
pin 8 of ICP801S and the PFC source would have to charge the CP814 main capacitor with 390 volts
tabupirata, I owed you this analysis, let's go with the diagram that Francisco uploaded if it is the right one we took it on foot
21
hace 5 años
Measurements made in POWER ON, main disconnected, LED Panel Do not turn ON.
THE CS805: 28V MY CARD
DS853: 5.13V ................. IS A MOSFET IN ONE SENSE GAVE ME .10V AND ON THE OTHER 7V
DM855: 12.74V ............... IS A MOSFET IN ONE SENSE GAVE ME .0.02V AND IN THE OTHER 0.03 V
C9110: 205V .................... 1V
D9102: 205V .................... 1.4V
D1 +: 205V ....................... 0.8V
D1-: 1.50V ...................... 0.7V
CP814S: 392V (304V) ...... 400 V
DP808: 392V (304V) ........ 0.34 V
DP803: 392V (304V) ....
DP802: 207V (304V)
DS804: 12.15V (11.88V)
DS806: 14.75V (20.00V)
21
hace 5 años
Measurements made on POWER ON, main disconnected, LED Panel DOES NOT TURN ON
MY CARD
THE CS 805 ...................... 28V
DS853: IT'S A MOSFET IN A 10V SENSE IN THE OTHER 7V
DM855: IT IS A MOSFET IN A 0.03V SENSE IN THE OTHER 0.02V
C9110: 1V
D9102: 1.4V
D1 +: 0.8V
D1-: 0.7V
CP814S: 410V
DP808: 0.34V
DP803: 0.11V
DP802: 0.17V
DS804: IN A SENSE 42V AND IN THE OTHER 2V
DS806: IN A SENSE 400V AND IN THE OTHER 180V A DISASTER !!!
ALL THESE COMPONENTS ARE BAD?
13.721
hace 5 años
These measurements are downloaded from the world, the interesting thing is that we are now sure that the LEDs turn on with the main disconnected.
another issue, if you follow the analysis that I did, great that you measured the 28 volts in CS805, that voltage has to reach pin 8 of ICP801S
I stay here waiting for your measurements;)
I measured with the black tip of the tester in the negative of the primary electrolyte of the primary
What tension do you have in base, in collector and in emitter of QS801, always with the main disconnected, I am waiting
21
hace 5 años
Tobias Maestro sorry for the delay but he had things to do and he also couldn't find the ICP or the QS801.
Well the readings are: PIN 8 OF ICP801S: 0.02V OR ON REQUEST THE 28 ARRIVE
The QS801 with main disconnected and the black of the tester in the negative of the electrolytic give me BASE: -0.05 COLLECTOR: -27v and ISSUER: -0.02v. (I don't know why they give me negatives) I DON'T KNOW WHAT I'M DOING BUT I DO WHAT YOU TELL ME. AND WHAT IT SEEMS IS ALL EVIL NOT? GREETINGS FRIEND I HOPE YOUR ANSWER
13.721
hace 5 años
there I uploaded an image, this time the black tip of the tester to the mass of the secondary, eye ...
The RS485 takes voltage of 5 volts, we estimate that those 5 volts (make sure they are) this voltage polarizes the PS_ON reaching voltage to the QQ852 gate this leads by turning on the internal LED of the PS802 optocoupler a measurement between pin 1 and 2 has to measure 1.2 volts
When the opto is switched on, the transistor of the latter is closed and conducts, polarizing QS801 and feeds pin 8 of ICP801
13.721
hace 5 años
Homework
1 like my answer, hehe and measure the components marked with a sign of admiration for shorts or leaks
with the black tip to secondary mass
2 measure on pin 1 of ps802
3 measure on pin 2 of ps802
4 measure at the gate of QQ852
measure that there are 5 volts in RS852 and voltage in PS_ON
Comment the measurements, we already have it cornered;)
21
hace 5 años
Hi Tobias, thanks for the graphic and patience: Let's start
1. I can't find RS485
2. I don't know very well how to measure the QS801, AND THE DZS 803 AND 804 BY SHORT OR LEAK
3. PC802S: PIN 1 6.2V .... PIN 2: 5.6V
4. QQ852 GATE: 6.5V
5. RS852: 5.37V
6. WHERE DO I MEASURE PS_ON?
21
hace 5 años
Well Tobi in the cathode of the octo I have 5.32v, my tester is not very accurate, I changed the battery. Now if I have to change the octo there is no problem, but the QQ852 is so CHIQUITOOOO, I will have to adapt my welder and a lot of patience but I will do it. Anyway I will have to buy it on Wednesday because it is now a holiday, and if I find it ...
21
hace 5 años
To buy it are: 2N 7002K? It may be because I think it says 2p above and something else I can't read.
And the other one is PS2561A Ok?
21
hace 5 años
No, the opto is from above, the 2n is from below. Thank you teacher! We'll see if he walks, after I change it, do I have to take any precautions?
21
hace 5 años
Well Tobi, change the components you told me, I put an 817 PC and the QQ got the 2n 7000. GO ON WITHOUT BUT ...
21
hace 5 años
It seems to me that there was progress, I already have tension in the comb that goes to the LEDs, but there seems to be a leak because it marks me I think 205v and 170 but it is downloading fast. THE LEDS DO NOT TURN ON WHEN DISCONNECTING THE MAIN. I still don't have the tensions in the comb that goes to the main, only the ones I had, but I'm going to see the measurements that you told me to do before, I'm going to do them and then I'll pass them on. okay?
13.721
hace 5 años
no, today I can't think, I'm not at home, tomorrow post me and we analyze
re-measure this and if there are 390 volts in the main filter, the biggest one, if there is no measurement on pin 8 of the ic, tell me the measurements
2 measure on pin 1 of ps802
3 measure on pin 2 of ps802
4 measure at the gate of QQ852
measure that there are 5 volts in RS852 and voltage in PS_ON
Comment the measurements, we already have it cornered;)
21
hace 5 años
ok teacher not problem, I leave it for tomorrow:
Main filter: 487 V (it seems to me that my tester is running for wed ...)
on pin 8 of the ICP801S I have 16.7 V
PC802S: PIN 1: 4.5 V ... PIN 2: 5.7 V
QQ852 CAT: 3.7V
RS852: 5.37V
PS_ON voltage: 3.87 V
21
hace 5 años
ok, I'm going to ask my old man for the tester, in the home network I'm measuring 269 v of alternating, this is for the or ...
21
hace 5 años
ok MASTER Change the battery to the tester. NEW MEASUREMENTS
Measurements made in POWER ON, main disconnected, Leds Panel OFF.
DS853: 5.17V
DM855: 20 V
C9110: 253V
D9102: 259V
D1 +: 257V
D1-: 111V (ACA HAD TO HAVE 1.5V AND DO I HAVE 111V?)
CP814S: 390V
DP808: 390V
DP803: 390V
DP802: 220V
DS804: 12.02V
DS806: 14.76V
Main filter: 391 V
on pin 8 of the ICP801S I have 14.16 V
PC802S: PIN 1: 1.27 V ... PIN 2: 0.07 V
QQ852 CAT: 2.69V
RS852: 5.18 V
PS_ON voltage: 3.06 V
LET'S HAVE A LOT OF FAITH !!!!!
13.721
hace 5 años
let's leave the leds for now, with the main disconnected if you have the tensions in the connectoe that would go to the main
1.B13V
12.A5V
11.B5V
7.Vamp
3.B13V
13.B5V
6.BLU_On there should be 5 volts or 3.3
if you have these voltages connect the main and see if turning on the TV raises 390 in the main filter
21
hace 5 años
Well teacher unfortunately:
1.B 0V
12.A 5V
11.B 0V
7.Vamp 0v
3.B 0V
13.B 0V
6.BLU_0 v
WE ARE IN THE OVEN!!!
21
hace 5 años
QM801
in base 14.57 V
collector 14.27 V
emitter 13.8 V
pin 7 of ICM801 14.9 V
come on teacher !!!!
13.721
hace 5 años
I advance you, pay attention
1- if you have the expected voltage in the 2 capacitors
as long as you have led + with respect to chassis and led - with respect to chassis
2- if you do not have tension, measure that the two legs on the side of the IC IC801 have between the legs of the IC8080 opto
Be very careful with the shorts when you measure
21
hace 5 años
Tobi here the teacher is you !!! I am an electronic technician but I never exercised ... I am a helicopter pilot ... now I am sorry but I was having dinner. I ADMIT your dedication .... give me a few minutes ... I already measure ..
21
hace 5 años
Good tobi
tension in
CM851 /: 251 Volts
and in
CM858: 0 Volts I also found that the plate is a little broken there
with the main disconnected and the 2 tips of the tester on the condenser legs
led + with respect to 252 Volt chassis and led - with respect to 106 Volt chassis
tension between the legs of the opto PC803S the two legs on the side of ic ICM801 0 Volts
21
hace 5 años
Master ... Now I'm going to put some tin where the plate is broken. Could it be that CM858 IS LOADED? When I unplug the fountain, the 251 falls as a briefcase ...
21
hace 5 años
Master if you look closely the problem is in the right leg of CM 868 that there is a tin droplet which is not if you must make contact in the left line that goes diagonally that goes to J 842 AND FOR THE RIGHT WITH ALL PARALLEL RESISTORS, at most I could make some bridges with wire to ensure contact with: AT LEAST THE FIRST RESISTANCE, THE DM855 AND J842 IF IT IS THERE THAT YOU MUST MAKE CONTACT, BUT REMEMBER THAT IN THIS CAPACITOR I HAVE 0 VOLTS.
SOURCE PLATE.jpeg [184.86kb]
22.858
hace 5 años
hace 5 años
If you have the 5v then your source if it delivers voltages, check if the pulse of the main arrives at the pin on off to start the other voltages, or disconnect the main from the source and check if the source enters voltages with the main disconnected.
BN44-00497A + BN44-00498APSU-47392.pdf [2.11MB]
BN44-00497A + BN44-00498APSU-47392.pdf [2.11MB]
21
hace 5 años
Thanks Francisco for the comment, disconnecting the main from the source or connecting it, the only voltage I have in the comb is the 5v stand by, A5V on pin 12, I don't have the 13v voltages on pins 1, 3 and 4 .
21
hace 5 años
I also forgot to tell you that when I disconnect the main they don't turn on the LEDs either.
21
hace 5 años
Hi Tobias, thanks for the graphic and patience:
Let us begin
1. I can't find RS485
2. I don't know very well how to measure the
21
hace 5 años
Hi Tobias, thanks for the graphic and patience: Let's start
1. I can't find RS485
2. I don't know very well how to measure the QS801, AND THE DZS 803 AND 804 BY SHORT OR LEAK
3. PC802S: PIN 1 6.2V .... PIN 2: 5.6V
4. QQ852 GATE: 6.5V
5. RS852: 5.37V
6. WHERE DO I MEASURE PS_ON?
21
hace 5 años
Well Tobi, change the components you told me, I put a PC 817 and the QQ got the 2n 7000. CONTINUES WITHOUT WALKING BUT .... I think there was progress, I already have tension in the comb that goes to the LEDs, but there seems to be a leak because it marks me I think 205v and 170 but it is downloading fast. THE LEDS DO NOT TURN ON WHEN DISCONNECTING THE MAIN. I still don't have the tensions in the comb that goes to the main, only the ones I had, but I'm going to see the measurements that you told me to do before, I'm going to do them and then I'll pass them on. ok, could it be that there are leds in short?
21
hace 5 años
3. PC802S: PIN 1 4.5V .... PIN 2: 5.7V
4. QQ852 GATE: 3.7V
5. RS852: 2.62V
Measurements made on POWER ON, main disconnected, LED Panel DOES NOT TURN ON
DS853: 7.4V
DM855: 5.5V
C9110: 379 V
D9102: 377 V
D1 +: 361 V
D1-: 155 V
CP814S: 572 V
DP808: 573 V
DP803: 340 V IN A SENSE 575V
DP802: 339 V
DS804: 16.9 V
DS806: 19.7 V
hace 5 años
hace 5 años
Hi tabupirata, I hope you still read this forum, you know that I spend the same time on the same TV and I read and it seems to be incomplete, the components that you change are: FCH10A10 2n7002 pc817, and with that I get up? Or did you do something else. Cheers!
21
hace 5 años
hace 5 años
GENIOOOO LA TELE ANDA DE 10 !!!!! WE ARE A TEACHER, YOU DESERVE THE BEST !!! YOU DON'T KNOW WHAT HAPPY YOU DID, HUG WITH MY WOMAN! HERE GOES PHOTO AND I WOULD LIKE TO TAKE YOU A PRESENT WHEN YOU GO TO MARPLA !!!! MY NAME IS ALEJANDRO GALLIANI LOOK FOR ME IN FACE! A HUG AND GIANT THANKS FOR PATIENCE AND PERSEVERANCE ... GREETINGS TO YOUR BRIDE AND BEST OF LUCK !!! AMIGAAAZOOO [img] / js / ckeditor / plugins / attach /attach_25.png[/img[mitele.jpg[80.10kb]
21
hace 5 años
I do not want to cause disturbances !!! give it just the same teacher looking at the diagram and connect it with bridges I do not know if it will be ok but it is not the same JAJA
21
hace 5 años
Do not become the mysterious now that I do not have time to think !!!!, Well my analysis goes, do not laugh:
IF I HAVE VOLTAGE IN CM 851: 251 Volts
and in CM858: 0 Volts FOR ME THE PROBLEM IS IN THE TM 801S BECAUSE THERE WILL BE THE VOLTAGE FOR THE DM854, DM855 OF PINS 9 AND 5, AND THERE SEEMS I HAVE NO VOLTAGE ...
tension between the legs of the opto PC803S the two legs on the side of the IC IC801 0 Volts AND IT SEEMS THAT THE 13 VOLTS GO FROM THE PINS 1,3,5, AND 7 OF THE CNM 803, THE TRUTH THAT I HAVE NO IDEA .... WHY DO I NOT HAVE 13 VOLTS?
21
hace 5 años
Thank you Tobi teacher, after so much effort you will not leave me now that I think we already have it ... now I am working but it is late I grab it again ...
21
hace 5 años
Well Tobi put the DM855 is an FCH10A10 according to the datasheet are two diodes with a common base. I think, if I measured it well, it is in good condition. red side black center gives me about .205 homs and back 0 homs, THE SAME WITH THE THREE LEGS. It is placed on the same heatsink with another as is the DS853 and the two measure exactly the same. PIN 1 WITH MASS GIVES ME ABOUT 474 HOMS. OR BE THAT IT IS NOT MASS.
WE ARE GOING CRAZY. WHAT I DO? DO I TAKE IT OUT TO MEASURE? OR I CHANGE IT DIRECTLY.
21
hace 5 años
OK TOBI I am going to take it out to measure it but HOW MUCH DO I HAVE TO GIVE?, Because the other one, the DS853 is the same ...
13.721
hace 5 años
https://www.youtube.com/watch?v=KJuLfnkCkGM
in the 17th minute they measure a diode like yours
21
hace 5 años
If Tobi had measured it that way and gave me that the diode is fine. Where else can I search?
13.721
hace 5 años
well, assemble everything and make 2 measurements and tell me both
1- I measured on pin 1 of the ground source, it has to measure you as a diode
2- measured from the middle pin of the diode, it must have continuity until pin 1 of the source
tell me the two results
21
hace 5 años
Well Tobi looks how interesting:
1- measured on pin 1 of the ground source, (With diode mode tester, 2K) ON THE SIDE OF THE PLATE: BLACK TO MASS, RED PIN 1: .474 HOMS
BLACK PIN 1, RED MASS: .197 HOMS PEROOO DISCOVERED THAT IN THE CONNECTOR PIN I HAVE NO MEASUREMENT! (1) OF THE TWO SIDES.
2- measured from the middle pin of the diode, to pin 1 of the source IN BEEP MODE, BLACK TO MIDDLE PIN, RED PIN 1: SOUND (FROM THE SIDE OF THE PLATE), BUT WHEN I MEASURE IN THE CONNECTOR PIN NO THERE IS MEASUREMENT.
tell me the two results
13.721
hace 5 años
I get dizzy, expected with the diode tester
1- from the center pin of the diode to pin one has to whistle, 0 ohms if it does not measure you have the path cut, you have to measure
2- Pin 1 to ground for one side has to measure between 100 and 500 ohms and for the other side, measure a moment and then nothing
PD the points you put in front of the ohms, is it a vice of writing or a 0.197 or is 197 ohms
21
hace 5 años
Master answered you:
1- from the center pin of the diode to pin one has pita, 0 ohms.
2- of pin 1 to ground for one side has that it measures 197 ohms and for the other side, it measures 474 ohms
the points that I put in front of the ohms, are not a vice what happens is that there I was measuring with the tester in diode mode, 2K.
21
hace 5 años
Well Tobi when in doubt if it does not come out very expensive and I GET IT, I change it and try it. But I will have to go out and buy it tomorrow after the laburo.
13.721
hace 5 años
It is not to change by changing, take it out and just measure it, with the diode tester with the red tip in the middle and the black one on the sides and then change the tips, for one side you have to measure the two equal and with the tips at mreves Nothing for nowhere, it's not hard
21
hace 5 años
Tobi that I already did and it gave me just as you say, for one side the same and for the other nothing, that's why I told you that for me that is fine.
13.721
hace 5 años
Ok, I was looking at the diagram and the 470 ohms are the array of resistors that have a mass of 13 volts, they are like 5 resistance to ground, let's rethink the problem
Come on again, plug the source with the tips of the tester in the electrolytic cm858 and see if for a moment there is tension and how much
21
hace 5 años
Tobi what I was thinking is the following. Now I have 12.60 volts on pin 1 on the side of the board, but we already know that they don't reach the connector pin. Maybe that voltage (if I get it to the connector) sends it to the main and enables all other voltages and so it starts. How about?
21
hace 5 años
Look master I was measuring in the 14 pins and now tensions appear that were not before:
pin 1 12.6 v
2 3.05v
3 12.6 v
4 12.6 v
5 12.6 v
6 2.87 v
7 12.6 v
8, 9 and 10 0 v
11 5.17 v
12 5.17 v
and 14 3.06 v NOW IT CAN BE THAT IF YOU CONNECT IT ANDE, EVEN YOU WOULD HAVE TO SOLVE THE THEME OF PIN 1 !!
13.721
hace 5 años
great your little square, the source of 13 already works, you did not go for the broken form, we go for the LEDs, while I think about it, without the main connected, the LEDs yes, I measured LEDs + at the table and took notice, then I measured led - to mass and take note ... pass me the values
mass is the panel plate, the screwed source if you connect the main, medis and tell me, I leave the task I will study
21
hace 5 años
GENIOOOO LA TELE ANDA DE 10 !!!!! WE ARE A TEACHER, YOU DESERVE THE BEST !!! YOU DON'T KNOW WHAT HAPPY YOU DID, HUG WITH MY WOMAN! HERE GOES PHOTO AND I WOULD LIKE TO TAKE YOU A PRESENT WHEN YOU GO TO MARPLA !!!! MY NAME IS ALEJANDRO GALLIANI LOOK FOR ME IN FACE! A GIANT HUG AND THANK YOU FOR PATIENCE AND CONSTANCE ... GREETINGS TO YOUR BRIDE AND THE BEST OF THE AMIGAAAZOOO LUCKS !!! mi tele.jpg [80.10kb]
21
hace 5 años
I DIDN'T DO IT ON PURPOSE, I DON'T KNOW HOW THIS WORKS, THE GENIUS IS TOO THAT I HELP ALL THE TIME I WILL SEE HOW I CAN REPAIR MY ERROR, REPITO DID NOT DO IT PURPOSE !!!
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