nicomena2015

9.501

hace 5 años

hello buddy: q, type of flickering has ... the brightness flickers ... the screen shrinks and enlarges ... turns on and off quickly ... flashes vertically ... or horizontally ... measure if It has stable 125v in C821 or has fluctuations ... greetings!

DJ G

1.026

hace 5 años

Give me a chance to make a small video, so you can better understand the problem

nicomena2015

9.501

hace 5 años

Well ... I had a video of what, it appears on the screen ... but I anticipate that, measure the screern ... on a dcv scale x 1000v measure the screen in the socket of the tube and see if there is a fluctuation of volage ... low a little bit like it from the pot q, it's at the bottom of the fli-bak and you see if the blinking goes away ...

DJ G

1.026

hace 5 años

ready add the video

DJ G

1.026

hace 5 años

forget to mention that the fault is presented in both video and cable

nicomena2015

9.501

hace 5 años

the photo q, you saw in the second place the image appears almost well ... the blinking is gone.?..if it went comment q, comp, have you disconnected or how the fault was solved..ok..comments xq, the photos are still fixed but does not say if there is flickering ... ok

nicomena2015

9.501

hace 5 años

colleague: if when raising an apatite of the r305 there is no flickering, change the C308 x one of equal value and voltage ... and comment results..ok

DJ G

1.026

hace 5 años

if colleague nicomena2015, the blinking went away when lifting one end of the R305 = 7.5k, I will replace the cap C308 = 68 000pf / 63v that you mention, I almost commented.

nicomena2015

9.501

hace 5 años

Well, colleague DJ G ... practically we have already solved the prob, the blinking ... if changing the C308 the prob is solved, comment it ... and do not forget to assess my contributions in the score box ..ok .. (congratulations colleague) and happy holidays /////

DJ G

1.026

hace 5 años

Change the cap and when welding again the r305 the problem reappears

DJ G

1.026

hace 5 años

In the image I uploaded it looks from the middle up line as if it were a bad cap, but observing I see that it looks like a kind of mirror effect

DJ G

1.026

hace 5 años

Manolo karval, I have practically checked all filters

manolo karvalo

30.814

hace 5 años

friend. It is not to review it is to change the filters for new ones, sometimes they will be good but they will fail

DJ G

1.026

hace 5 años

I wrote wrong, I meant that almost all of them have changed my friend

DJ G

1.026

hace 5 años

Ka2131 pins 1-0v 2-13.5v 3-0.8v 4-25.2v 5-14.8v 6-0.7v 7 = -0.3v 8-1.8v 9-24.5v

manolo karvalo

30.814

hace 5 años

friend. as I see in my notes pin 2-9.69volt. pin 5- 10.9volt. pin 7-0.22volt. pin 4-23.7volt. pin 9-23.4volt. I see that there is little difference in these pins others if they are good. I think you can try a new eprom that is the same number and recorded with the micro data.

DJ G

1.026

hace 5 años

I went ahead and did it but it gives the same result

DJ G

1.026

hace 5 años

even probe with another vertical and nothing companions

DJ G

1.026

hace 5 años

I placed one blank but there was no change

nicomena2015

9.501

hace 5 años

colleague: I could not accompany him I ran out of internet ... did you change the C308 ..? if I do not steal the result, change the R305 x an R of 15kohm and you see that it does ... the C306 of 1000mfx35v you changed it ...? .. if you did not change it change it ... (important) the R304 of 1.5 ohm did not change it ... do the test look for a 2.2ohm R and weld it in parallel with the R304 and see if it fills the screen ... comment this test ...

DJ G

1.026

hace 5 años

Nicomena2015 companion, I commented that the c308 change it without results, change the r305 of 7.5k by one of 15k as you suggested without results, just in case replace the c306 again with one of 1000uf / 50v, when doing this last image jump and It stops as well as its outside a spring, when changing the channel or A / V the same thing happens until it is still, I proceeded to place the resistance of 2.2ohm in parallel and the image is open in excess but does not jump.

nicomena2015

9.501

hace 5 años

we also have to check or measure the values of the resistors .. x (exe) (R307 of 56kohm) - (R306 of 43kohm) - (R303 of 62kohm) -
(R308 of 62kohm) -R302 of 330ohm- (R311 of 1.2 kohm) ... all these resistors should be measured with attention xq, maybe, some are open ... and there are q, measure them by desoldering it from a little leg since q, their values are high and put in the circuit they can give erroneous values ... and the signals q, leave R308 and R302 return to the micro of there the importance of measuring all these resistors well ... comment results ..

nicomena2015

9.501

hace 5 años

well if you do not jump with the R of 2.2ohm connected in parallel with the R304 take out the R of 2.2ohm and also change the original R304 of the tv x a
(1ohm R) and you see that, there is a result ... if you fill the screen it would be a matter of taking the jump or jump of the image ... and the C308 I do not know if you left it connected or disconnected ... but try with another value x (exe) 10,000pf ... or 0.01mf..o 0.001mf ... comment ... do not forget to see how the resistors are q, I suggested ...

DJ G

1.026

hace 5 años

R307 = 56k> 55.6k
R306 = 43k> 42.7k
R303 = 62k> 61.5k
R308 = 62k> 60.9k
R302 = 330> 300
R311 = 1.2k> does not exist
The c308 is connected, when I put the 2.2 resistor in parallel it stretched too high up and down so much that the osd was not visible

DJ G

1.026

hace 5 años

correction R302 = 330> 330, I wrote it wrong

nicomena2015

9.501

hace 5 años

well if the resistors are good, more or less well, take out the R of 2.2ohm and also take out the R304 and put in the place of the R304 one of 1ohm..and see if the vertical is not stretched anymore ... there can be no stretched both the vertical when collecting the R of 2.2ohm ... maybe you connected one of 0.22ohm ... pay attention to the value ... (2,2ohm is red golden golden red) ... as I suggested previously change the C308 of (68,000pf) x one of (10,000pf) or (.01mf) or try one of (.001mf) ... test change the R304 x a single of (1ohm) or (1.2ohm) to see if we don't stretch the vertical so much ..

DJ G

1.026

hace 5 años

colleague nicomena2015, I tried with a 10,000pf cap without any improvement

DJ G

1.026

hace 5 años

no buddy, the resistance of 2.2 if it was of the right value, I will eat and try with a 1 ohm

DJ G

1.026

hace 5 años

Tested with a resistance of 1 ohm and the 1,000pf cap and did not improve

nicomena2015

9.501

hace 5 años

well but as I stand the vertical now ... fills the screen ... or not ... blinks or not ... this image is bent as it appears in the photo ... q, if you disconnect the C308 and q, do the connect it ... in a previous comment you say that, when changing the C306 it jumps a bit and stops until it is fixed ... it is the same now ... give me more data ... ok ..

DJ G

1.026

hace 5 años

I stay more open than normal, it blinks until it stops, if I change the channel it flashes until it stops, the bend only happened when disconnecting the r305, I will see how to disconnect the c308

DJ G

1.026

hace 5 años

Without the cap the image is folded, with the cap it flashes until it stops

nicomena2015

9.501

hace 5 años

well: there is a C310 of 10mfx50v I don't know if you changed it ... look at the equema there is a resistance of 1.k5 ohm between the positive of the C306 and the 24v q, they go to pin 6 ... and there is also another resistance of 1.5kohm between the positive of the C306 and mass ... if you have it they are both of equal value connect them as I explained and we see if the flickering is stabilized ... it seems that there is a DC mismatch in the verical circuit or in the v-ramp ... comment if you got it ... ok ..

DJ G

1.026

hace 5 años

c310 if I change it, the resistances you mention don't know what they are, look at the image that I uploaded to the question above

nicomena2015

9.501

hace 5 años

they are not in this circuit ... the q, I have in sight is the same ... there is a mismatch between the micro and the circueteria of the vertical lc ... when moving from one channel to another there is a mismatch in synchronism. .. you already changed all the Capacitors ... try changing the C304 of 1mf x one of (0.47mf) of polyester and we see that, pass ... the prob, is to remove the vertical mismatch ... something is wrong in the vertical circueteria ... do that test and see ..

DJ G

1.026

hace 5 años

Colleague nicomena2015, when changing the c304 from 1uf / 63v to one of 0.47uf / 100v polyester the tv already works normal on tv and A / V, also when changing channels, I will check the abl since I see the image a little opaque

nicomena2015

9.501

hace 5 años

Well buddy: the prob, the vertical jump would be solved ... I think, I deserve a couple of points in the score box devalue my first comment ... ok .. (do not forget to rate) ... ( cost but we solve it) ... (congratulations) ... and if you have a bad image we will continue seeing ... comment and ... happy new year //// ... greetings!

DJ G

1.026

hace 5 años

well after changing the R412 = 100k that was open and the R222 = 470k that was undervalued, both of the abl circuit and thanks to the instructions of all those who participated especially to the colleague nicomea2015, the TV has already been repaired.