DIY CIRCUITS ELECTRONICS

this tv stuck in stand by(red led) and doesn't start when you press the button on the front side or with the remote control..the fault was obvious when i examined the pcb,but sometimes there is no physical damage to the components.

this time im taking a look inside an old pa amplifier(PAL A208) made in greece, that is still used in a church.the only problem this amplifier had was that the potentiometers were a little ''scratchy''.i think it is interesting to look inside this device and see how electronics were made about 30 years ago and of course by hand. this video was shot with a samsung s21fe at 4k/60fps and the video is colour corrected because i wasnt using any external lights and had to white balance the video a little bit.keep in mind that there is some compression in the editing software and some compression by youtube when uploading a video. i would like to see comments about the video quality because im still experimenting.

an easy to build charger using cheap and easy to find components.li-ion batteries are very common these days.you can find them everywhere.in laptops,smartphones,e-cigs,etc. in this episode im building a simple charger that can charge 2x18650 type batteries at 1amp each.you can adjust the charge current by replacing a resistor shown in the video.this charger is using the very cheap and popular ic tp4056. you can find a module using this integrated circuit in a few variations, with or without battery protection circuit, with mini or micro usb input, even with type c usb input connector.it can be found everywhere,ali express,e-bay,etc.

this time it's a philips monitor-tv MWT1201T im fixing.on this device the red stand by led goes green for a moment and then red again.of course the device doesnt start.

This time im looking inside a conceptum mini ups Mr Cable GM-4 to see what's wrong with its 12v output.This device is usefull when there is power outage for some reason and keeps the internet-telephony working until power is restored.

This time im repairing a samsung led tv UE32F5000AW. The device has audio but not picture.In this video you will see how to dissasemble the device to test and replace led strips-bars.Of course before doing this, make sure that the problem is the backlight and not something else like the t-con board that often fails on this model.Also you will see why you should always replace all led strips-arrays-bars. feel free to post your comments below.

Another led tv repair.This time it's an LG TV 32LB560B.The device has two round white spots - patches on screen which is very common these days for many tv brands,also the screen is not very bright.let's see what's goin' on inside this tv and how to dissasemble and repair it. If you liked this video or helped you in some way consider subscribing to this channel. Also feel free to leave any comment.

this video is about SONY KV32U2000.the stand by led blinks 4 times and the tv doesn't start. this is a common symptom in many sony tv models.also other brands have the same issue but they dont have the blinking error code that sony does.

components needed R1=10K RESISTOR R2=1K RESISTOR R3=2K2 RESISTOR Q1=BC547 OR EQUIVALENT TRANSISTOR D1=LED DIODE IR RECEIVER - ANY INFRARED RECEIVER FROM DEVICE THAT OPERATES WITH REMOTE CONTROL AS LONG AS YOU KNOW THE PINOUT.

in this video im testing LM117-ADJ. its a low dropout voltage regulator bought cheap from ebay..is it worth bying or not?is it real or fake?whould you trust it in a project or device?

this time im fixing a led table lamp a friend gave me...and then a small modification..

a new video showing how i test the led bars of a tv & how to find which led is damaged. in this video im using a small device i made long time ago that allows me to inject voltage to a led or led bar and see if it is working. video of this device and how it is made in this link here