IMG_20180226_181225.jpg [2.29MB]
I have this TV with that horizontal line in the middle, I checked voltages in vertical input, the output has them, flyback voltages OK according to the diagram. I had the cable punctured, I insulated it because all the high voltage was leaking, it turned on and the screen looked dark, I got to raise the screen and you see that short horizontal line. Anyone who has had this fault that guides me better.
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IMG_20180226_181225.jpg [2.29MB]
I have this TV with that horizontal line in the middle, I checked voltages in vertical input, the output has them, flyback voltages OK according to the diagram. I had the cable punctured, I insulated it because all the high voltage was leaking, it turned on and the screen looked dark, I got to raise the screen and you see that short horizontal line. Anyone who has had this fault that guides me better.
HYPSON 29HTV-B016, short horizontal line
Televisor HYPSON 29HTV-B016
Televisor HYPSON 29HTV-B016
8 Soluciones
20 Reparaciones
hace 5 años
hace 5 años
IMG_20180226_181225.jpg [2.29MB]
I have this TV with that horizontal line in the middle, I checked voltages in vertical input, the output has them, flyback voltages OK according to the diagram. I had the cable punctured, I insulated it because all the high voltage was leaking, it turned on and the screen looked dark, I got to raise the screen and you see that short horizontal line. Anyone who has had this fault that guides me better.
30.814
hace 5 años
friend. measure the tense of each ic pin vertical and upload results and what number is that ic. vertical
17.741
hace 5 años
Change the vertical IC. You must first be sure that all tensions are fine. Surely such a leak burned the IC that is common.
And don't run the TV like that with a lot of scrin. You can mark the tube.
Check all food well is as directed. Welds and printed that is not cut.
Important to control yoke and the R that goes to low value mass.
hace 5 años
hello the ic is a LA78041
P1 INPUT 2.6 V
P2 VDC2 27 V
P3 PUMPOUT 0.3 V
P4 GND
P5 OUTPUT 10.5v
P6 VDC1 27 V
P7 NON IN 2.5 V
E CHECADO DEL IC LC863432C PIN 17 V-SYNC THERE IS 5 VOLT PASS THROUGH A C1815 AND FROM THERE TO THE VERTICAL IC THAT COMES TO PIN 3 THE VERTICAL PULSES WOULD BE.
30.814
hace 5 años
friend. so I see the trends of the ic.vertical on pin 5 missing 3 volt. the other trends are good now when you measured those trends you had already changed the ic. vertical or not or as the fault continues
30.814
hace 5 años
hace 5 años
Hello Friend. before changing the ic. vertical changes all filters with new ones that are related to the ic. vertical and although the diode that feeds the ic is good. vert. change it and if the fault persists you check the resistors that feed the diode. Cheers
47.894
hace 5 años
hace 5 años
Let's see, the fact that this horizontal line (absence of sweeping or vertical deflection) does not cover the entire width of the screen, makes us suspect the absence of "5V" on pin 43: (V / C / D) Jungle N201, voltage from Reg + 5V N402: AN7805.
However, only in the case of confirming this presumption check if this regulator receives 10V on its pin 1: IN necessary to deliver 5V on its pin 3: OUT, if it does not receive those 10V check that any of the R404 fusers have not blown : 4.7Ω 5% 1 / 2W or R427: 1Ω 5% 1W due to eventual damage of the fast diode VD404: RGP10D or of the same Reg AN7805.
Regards!
Joansoler
[img] https://preview.ibb.co/mDr8Nc/A_HYPSON_HE_828_A_29_HTV_B016_BLUESKY_TF2988_GM_10_V_FOR_REG_5_V_N40g / [img]
[url=https://es.imgbb.com/] upload images internet
hace 5 años
hello joansoler already checked the 10 volt 5 goes to the micro, now if the ic is working and has its respective voltages where the fault will go
hace 5 años
I forgot to mention that it has no audio or grab the antenna or cable will not be a video fault
hace 5 años
hello joansoler check the voltages pin 43 and pin 8 are the 5 volts is more probe another screen thinking it was the yoke and it is not the first time that complicates a tv with this fault
hace 5 años
I got another TV these days and had problems in the the vertical ic was a LA78045 AND THE HYPSON I RENIEGO IS A LA78041 EXACTLY THE SAME PINS AND IN PIN 3 PUMP has a negative voltage LA78045 and the LA78041in pin 3 pump no, QUESTION these work differently or the little syrup is different .. ALSO HAVE THE SAME PINES
47.894
hace 5 años
In these ICs of the LA78xxx series, pin 3: PUMP-UP has a higher voltage in 1V to 2V with respect to its 4: -VDC pin, regardless of whether this pin is directly connected to GND (ground or ground) or to a negative voltage (-15V Approx).
If there is no interrupted printed track in this vertical output sector and it is also not "undervalued" (dry) C457: 1 000uF / 25V or "overrated" or cast R459: 1Ω 5% 1W, then suspect the faulty Jungle because of the high voltage leak in the FBT cable.
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