Lg Repair Tips

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Results: 4875

Make	Model	Symptom	Problem
LG	1470	No image, very low flyback supply voltage b+	It was found that the flyback had a short in its primary and the capacitor c721 and the resistor r726 were damaged by the internal short of the flyback in the abl circuit. The flyback and capacitor were replaced, and everything started working normally again.
LG	1470	After changing fb, spots on the screen and unstable frame size	The image is irregular, darker than usual and the brightness/contrast buttons don't work (they don't work linearly. as I increase it it can increase/decrease the brightness/contrast). - the right part of the image has spots. - when I change the resolution or modify the image (for example, I am on a dark screen and open a completely white screen), the intensity of the image changes and the size of the frame too. I opened the monitor, the technician installed a Copeco 14023 flyback (correct for this monitor), but apparently he did not replace any other parts. Reverse the 2 wires on the outer coil of the fly-back. (the one wound on the ferrite)
LG	1470	Does not control brightness	Well, the thing that kept me up at night is the c 919 470/16 volt electrolytic capacitor, in the power supply, after I checked all the components on the brightness line several times and found nothing abnormal.
LG	1470	The flyback and components in the abl line were replaced but after turning on the monitor it does not display contrast and when turned off there is a bright spot on the screen	This monitor, when the fly burns out, has the habit of burning components in the abl line and sometimes it even makes a hole in the board and chars the tracks because that's where the problem was between the abl track and the ground, it was charred but I I had no idea that it was leading from abl to ground + or - 1 k, so I dismantled the track and made a wired connection and the monitor is working perfectly.
LG	1470	When it received the video signal, it disarmed and had an amber LED.	Q905 shorted. I replaced the transistor q905, and the defect disappeared.
LG	1470	Doesn't turn on, doesn't have a mat	Sparking in the tube. change flyback code 61742-2001 to ipeco code 14023.
LG	1465 DLS	Turns on, there is voltage at the power supply but the filament does not light up	For the filament to light up it depends on a high level on pin 17 of ic202 and this commands q918 which commands q920 which commands q919. Finding the defect in the flay black, I replaced it and the monitor worked
LG	CB775C-NA	It kept blinking when adjusting vertical position	Change the tda4866j (ic601), of vertical deflection
LG	1470	Inoperative. green LED lights up	Flyback
LG	1470	Inoperative. green LED lights up	Flyback
LG	1470	Inoperative. green LED lights up	Flyback
LG	1470	Inoperative. green LED lights up	Flyback
LG	CP-20B84	Dead	Ci ta8808bn.
LG	CP-20B84	Dead	Ci ta8808bn.
LG	CP-20B84	Dead	Ci ta8808bn.
LG	29FX5R	Frequent burning of the horizontal transistor	X401
LG	CP29K30	Does not tune channels	C102[47pf]
LG	CP 20K42	Normal image appears and goes dark	D502
LG	CP20B85	Image shifted to the right.	Zener diode zd412 (9.1v) - change unconditionally.
LG	CP-29K30 081D	Dead	Shorted diode d401 (ru4ds)