I'm trying to fix an old Panasonic LED TV, mainly for educational purposes.
While I was checking voltages on the P-Board I got to know the voltage of the SRV-16V rail is 13.2V (with and without dummy load).
Both 16V and 24V rails are bit lower than specifications. However the 5.3V standby line...
Littered around my house I have a lot of DC and AC power sources - car batteries, power tool batteries, USB 5v wall adaptors 12V DC wall adaptors, old PC power supplies, 12 and 24V AC wall adaptors etc etc I also have a collection of old mains transformers I could use
Converting AC to (dirty...
Hello everyone, i have an old acer monitor "AL 1916W"
it was totally dead but after i replace some bad caps now the led turns green and red when it's in sleep mode.
but the picture at all no backlight or a dim picture in the LCD.
i just wanted to know how can i test the backlight and the lcd...
I got a damaged ATX PSU with primary transistors (13007) blown. When opened to repair I found that it doesn’t have EMI filter (markings present on pcb). I decided to include one and designed as attached pic.
As not an expert I’m not sure about the required values of X caps and inductors. The...
Hello guys!
Since i am new here first I would like to apologize if i did draw this schematic wrong(i.e. lines do cross, etc.).It is a few days that i am using this online editor so i am still in the learning process and need to gain a bit more expirience.
I created followed circuit:555 timer...
hi, i put the resistor R23 which was smd, but i put through hole resistor and it started working and it stopped becoz the solder came out,its too difficult to solder with my big solder point .. when i tried to solder again the whole strip came off teared apart.. ,please help me in identifying...
Hello members,
The PSU was running when a lightning bolt struck far away. turned off and cannot power on again.
so probably overvoltage exposed.
I opened the PSU to replace the fuse. it is a ceramic one, therefore I cannot see at first sight if it is blown. Also removal seems unnecessarily...
This might be a super obvious question to most over here, but I know nothing about power supplies, so please bear with as I try to explain what is going on.
I have one of these SPS705 68VDC power supplies running inside a rather simple stepper motor control box...
Hi everyone!
I'm currently working on a new project that consists in developing a dummy load to test a multiple output IPSU, it has 9 rails and their voltage ranges from 1.25V to 5V, the output current should be less than 1A, but for testing purposes let's consider 1.5A.
The idea is to have...
this is the schematic ive built. Its designed to give an adjustable output of 35-50v, the question is which part do i have to change to make it work below 35v. I have this connected to a 24v transformer and all it gives out is 35v(no matter the pot position). I know this is very simple for some.
Hi,
Does anyone know of something to convert 240V mains to 15V DC at upto 2A? I want it to be as compact as possible.
I've been looking for PCB mounted modules but the price and size of them seems ridiculous. For example; Farnell sell a VTX-214-030-115 for £20.
You can buy a whole bench PSU...