Lg Repair Tips

Search: lg
Results: 4929

Make	Model	Symptom	Problem
LG	LG19P995E CHASSIS CA84	He sets it up, it's high but it doesn't light the tube	The power supply secondary voltages are normal, there is 125vdc at the +b of the fly and 90v at the tsh collector. it was the video proc ci
LG	LG 57M-CA 46	Monitor is too wide. The controls work normally in all resolutions, but when they are at their minimum width, they still have excess width.	After searching the entire circuit wide and finding nothing, I observed that the 12v power supply was 14.5v on pin 8 of ic 503 (kia 358) h. size, I went there to the outlet responsible for the 12v (ic 903) and found the diode d 916 was shorted, this thing gave me a bigger headache. (problem solved)
LG	LG 57M-CA 46	Monitor that is disarming the high power supply	I verified that the +b has a very high 260v and it keeps arming and disarming. After many tests looking for the defect I realized that when I turned it on, the filament didn't light up and sparks came out of the crt board. I disconnected the 6.3v from the crt board and measured it was normal. But when I connected it to the board it dropped to 3v so I decided to change the tube and it started working normally again.
LG	LG 44M STUDIWORKS CHASSIS 32	When starting the computer, the boot and extended memory sign appears normally, but when starting Windows, the screen is white without any image	The c.i. 202 ( gvc 08001 ) was defective. After a long search, I finally found a used one. After replacement, the monitor started working normally again.
LG	LG 20	Security system discharge but no image	I was about to buy the fly but I discovered a swollen capacitor connecting the pins of this fly and I replaced it and great.
LG	LG 14"	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	FLATRON 795FT PLUS-FB795CU	It is 4 mm on both sides, after 20 minutes of use the image is correct	Some customers have noticed changes in the horizontal part of the monitor. changes r706(rn 15kΩ ==> rd 15kΩ)
LG	FLATRON 775FT-FB775CEA	Video card (voodoo) causes problem (the sync signal is cut).	First, check if the identification label (model no) is fb775c-ea, fb775c-ep, fb774c-ea and fb774c-ep. then check if the c744(0ce107cp630 capacitor,100uf 160v) is in good condition. if not, change c744 as the same part(0ce107cp630) change r412, c404 as following (part position -> next to micro r412 : 5.1kΩ --> 10kΩ c404 : 220pf --> 47pf
LG	FLATRON 775FT-FB775CEA	Flicker appears at the top of the screen repair procedure	First, check that the label identification is fb775c-ea, fb775c-ep, fb774c-ca and fb774c-cp. then modify c605, zd601 as below: c605 : 224j --> 154j cf. C605 is the existing form 6870T281A11(PCB board). zd601: 5.1b --> 5.6b
LG	561N/560N/560A	Lackluster lack of definition focus	Replace o fly-back
LG	1470	Width and pad controls don't work	Change q709
LG	1470	It didn't work	After making some repairs to the primary power supply, it is working, but the image is completely dark and bluish. I was suspicious of the image tube, I changed it, but it didn't solve it. So I checked the entire g1 line and found a shorted diode d322, on the kinescope board, but it didn't solve it. I replaced the tda 4882, and everything went back to normal.
LG	1470	Dead	Green LED lights up switch flyback
LG	1470	It turns on but does not show high voltage and has a buzzing sound	Check the fly-back 6174z-2001a it usually makes this type of defect. When you change it, change the c723 together. Capacitor c 723 open. Replaced and started working again.
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.