Re: LG 50PJ550 Clicking
https://KIT363 EAY60968701 EAX613971...on=ViewProductThanks flocko was going to try this kit
https://KIT363 EAY60968701 EAX613971...on=ViewProductThanks flocko was going to try this kit
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Last edited by sordids999; 10-30-2015, 08:37 AM. -
Re: LG 50PJ550 Clicking
The SMD resistor 680K (4) 620K(1) and 560K(1) IC 701 MC81F4316 and use 3BR1065JF gives it more head room, and is the same as used on Samsung power boards so always at handComment
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Re: LG 50PJ550 Clicking
Update:::
Replaced all parts as described by Flocko and tv up and working now
ThanksComment
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Re: LG 50PJ550 Clicking
Well done Lee, did you upgrade to the ICE3BR1065JF current mode controller. I fit these now in all my power board repairs, LG and SamsungComment
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Re: LG 50PJ550 Clicking
Nice one
Please Do Not PM My Page Asking For Help Badcaps Is The Place For Advise, Page Linked For Business Reasons Only. Anyone Doing So Will Be Banned Instantly !
https://www.facebook.com/Telford-Tel...7894576335359/Comment
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Re: LG 50PJ550 Clicking
The TV is still working fine but started to develop a faint white line going across the screen I know when I fixed it the to had a bit of image burn
So do you think it's the panel ?Attached FilesLast edited by sordids999; 11-15-2015, 02:24 AM.Comment
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Re: LG 50PJ550 Clicking
Hi Lee check Y buffer ribbon that lines up with it and give it a good clean,it could be Y buffer but would normally show as a dark line.but could be on its way out?Comment
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Re: LG 50PJ550 Clicking
Ah that might explain it flocko I had a few black lines when I Resinstalled buffers but sorted that by finding a few ribbons out of line so fixed this but a few days later the white line appeared I'll look again
ThanksComment
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Re: LG 50PJ550 Clicking
ok cleaned like Flocko suggested all working again no white line ill keep monitoring this although the panel has image burn
thanksComment
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Hi,
I am repairing a ups which doesn't turn on ,it has the following ICs:
SG3525 used to drive inverter mosfets.
couple of uc3483, one for the power supply and another to drive a big mosfet at the output stage(i think the technique is called boost)
A LM358 and TL074 for control mechanism and of course the uController.
The SG3525 is shutting down every time the ups is turned on.
I want your help to know the function of LM358 and TL074 in the system.
I reverse engineered the LM358 circuit and i think that one of the block(A) is used for battery level... -
Hi friends of electronics
What you see in the video and pictures attached is the circuit for charging the batteries of a DC motor.
The problem is that this circuit cannot charge the batteries (3 1800mAH NiMH batteries) any more. When the circuit was OK, its green LEDs lit up one at a time to show that the batteries have charged more. But now that the circuit is flawed, LEDs light up as you see in the video and at the same time successive beeps are heard.
Please help me fix this circuit.
(the datasheet of the IC: https://pdf.datasheet.live/28... -
Hello friends,
Looking for some guidance here. The RAM voltage circuit on this motherboard keeps burning out PU301 which is a RT8231AGQW. Copy of the board with the burnt chip attached with some voltage measurements and copy of the schematics also included.
I think I've checked almost every component in the circuit, but when I change the RT8231, the laptop starts I have 1.2V on the inductor for about 10 seconds and then the RT8231 goes south and no more voltage on the inductor. All other voltages on the laptop are good, this is the only one conking out for a reason I... -
Hello.
I have seen a short circuit tester made with 3 * 9V batteries, a voltage limiter component and a resistor connected to the probes of a multimeter.
The theory is that the meter becomes sensitive enough to read very low resistances and the lowest resistance to ground on a circuit is likely to be a short circuit in that area.
Link
The Amazing $1 Short Finder Upgraded! Convert ... - YouTube
https://www.youtube.com/watch?v=0eixDdCpiO4
My multimeter isn't normally sensitive to very small resistance, but when I put a 1 mega ohm resistor... -
Hello. MSI B250 Gaming M3 board, short-circuit on the power supply. Found a problematic mosfet VQ1
(N-PK616BA_PDFN8-HF) soldered it out - short circuit is gone. I replaced VQ1 + VQ5 (N-PK632BA_PDFN8-HF). VQ1 was replaced with PK618. After starting attempt VQ1 is lit again. What can be the problem? In the driver?
Schematic and Boardview here
...04-04-2025, 03:57 PM
Comment