Led spotlight 220-240W-50Hz max30W

[bohaboha]

Hi I have four spotlight only one is ok? that flashes can you help determine which lamp should I replace look at the pictures so you understand better thank you

[bohaboha]

Re: Led spotlight 220-240W-50Hz max30W

is there no one who wants or is interested to help for this thread? don't know how they work probably they are divided in three blocks of 16 joints at a time. i have tested with ledtester which gives 23v for the whole board which has 54 joints. i don't manage to light a single one to get the value please if someone who knows i am very grateful

[sam_sam_sam]

Re: Led spotlight 220-240W-50Hz max30W

Take a better picture of the transformer data plate so I can read the entire thing the picture that you posted is not very clear to read everything

Also take a picture of the back of the circuit board so I can what it looks like

[bohaboha]

Re: Led spotlight 220-240W-50Hz max30W

Take a better picture of the transformer data plate so I can read the entire thing the picture that you posted is not very clear to read everything

Also take a picture of the back of the circuit board so I can what it looks like

Hi hope these are better. Are these powered by transformer or led drive?

[sam_sam_sam]

Re: Led spotlight 220-240W-50Hz max30W

What about the picture of the back of the circuit board

[bohaboha]

Re: Led spotlight 220-240W-50Hz max30W

What about the picture of the back of the circuit board

here är det,so you see it's a bit dark around the big diode it's been really hot don't know if it burned because when I cleaned it all went away but there is trace that it got really hot there you can see the difference in the next post

[bohaboha]

Re: Led spotlight 220-240W-50Hz max30W

here it is cleaned

[sam_sam_sam]

Re: Led spotlight 220-240W-50Hz max30W

Here is two pages of the data that I could find of the ZC811C ic chip

This ic chip one of the pin when looking at with the print so you can read the print the pin on the most left pin look like it not a good connection to the board

You can find this ic chip on eBay

https://www.ebay.com/itm/33312542232...Bk9SR7KYyd_0YA

[bohaboha]

Re: Led spotlight 220-240W-50Hz max30W

Here is two pages of the data that I could find of the ZC811C ic chip

This ic chip one of the pin when looking at with the print so you can read the print the pin on the most left pin look like it not a good connection to the board

You can find this ic chip on eBay

https://www.ebay.com/itm/33312542232...Bk9SR7KYyd_0YA

thanks. let's see if I can fix them

[bohaboha]

Re: Led spotlight 220-240W-50Hz max30W

Here is two pages of the data that I could find of the ZC811C ic chip

This ic chip one of the pin when looking at with the print so you can read the print the pin on the most left pin look like it not a good connection to the board

You can find this ic chip on eBay

https://www.ebay.com/itm/33312542232...Bk9SR7KYyd_0YA

How can it be 2.504v for a single led lamp and 15.5v for the whole plate which has 54 led lamps

[stj]

Re: Led spotlight 220-240W-50Hz max30W

6 in series, then the strings are in parallel

[bohaboha]

Re: Led spotlight 220-240W-50Hz max30W

6 in series, then the strings are in parallel

ok but can you explain a bit more ?and if I want to replace a broken led bulb which how much volt should it have?

[stj]

Re: Led spotlight 220-240W-50Hz max30W

put a meter across a working led to see the voltage drop

[diif]

Re: Led spotlight 220-240W-50Hz max30W

ok but can you explain a bit more ?and if I want to replace a broken led bulb which how much volt should it have?

Those lamps don't have sufficient cooling, look at all the dark LEDs in photo #4.

[bohaboha]

Re: Led spotlight 220-240W-50Hz max30W

put a meter across a working led to see the voltage drop

as you see it gives 2,5 v and there is 54 led and i get 15.5v total how can it be?

[bohaboha]

Re: Led spotlight 220-240W-50Hz max30W

Those lamps don't have sufficient cooling, look at all the dark LEDs in photo #4.

They lie on a cooling surface.but apparently it is not sufficient

[sam_sam_sam]

Re: Led spotlight 220-240W-50Hz max30W

There 9 parallel strings 6 in series @ 2.5 volt LEDs = 15.5 volts power supply voltage

So if the LED driver ic chip is defective or there is an issue with the switching power supply or you have LED ic chips over current or do not light at all or very dim these are going to be most of your issues unless you have bad soldering joints

[bohaboha]

Re: Led spotlight 220-240W-50Hz max30W

There 9 parallel strings 6 in series @ 2.5 volt LEDs = 15.5 volts power supply voltage

So if the LED driver ic chip is defective or there is an issue with the switching power supply or you have LED ic chips over current or do not light at all or very dim these are going to be most of your issues unless you have bad soldering joints

thanks very clear explanation. at the moment I'm still repairing the car I'll look at it here afterwards