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
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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 -
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 likeComment
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Re: Led spotlight 220-240W-50Hz max30W
What about the picture of the back of the circuit boardComment
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Re: Led spotlight 220-240W-50Hz max30W
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 postAttached FilesLast edited by bohaboha; 10-04-2022, 06:40 PM.Comment
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Re: Led spotlight 220-240W-50Hz max30W
here it is cleanedAttached FilesComment
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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_0YAAttached FilesLast edited by sam_sam_sam; 10-04-2022, 08:29 PM.Comment
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Re: Led spotlight 220-240W-50Hz max30W
6 in series, then the strings are in parallelComment
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Re: Led spotlight 220-240W-50Hz max30W
put a meter across a working led to see the voltage dropComment
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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 jointsLast edited by sam_sam_sam; 10-08-2022, 08:27 AM.Comment
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Hoping someone here can put me on the right track. I'm trying to troubleshoot/flowchart the "internal projector error" on my newly acquired Facebook Marketplace bought Epson 5040UB projector (3LED, not DLP). Owner said it needed new lamp, actually error code blink pattern indicates "Internal Projector Error, call Epson support". Unit is out of warranty as of 8/19
Here's what happens:
1) Power on
2) Blue power indicator lights and the lens cover motor opens the lens cover, light fan noise heard
3) Blue status light flashes for appx 4 minutes... -
Hi All.
Does anyone have any reference materials or something I can use to try troubleshooting a BenQ TH681? Google unfortunately has turned up zip. I did find a service manual for a W series BenQ but that is pretty much useless, it's more a glorified user manual. A list of voltages would be great as I suspect my mainboard is faulty, the colour wheel voltage is not dipping like it should.
The one I am troubleshooting now was originally overheating after a lamp replacement. It originally would take 2 minutes or so for it to shut off and blink the temp and lamp lights... -
Hi,
This monitor previously is my main working monitor which i have been using for 8~9 years. Yesterday, when i switched on my pc from fresh to power on, the monitor is just black no display. I started dismantle to look inside the monitor power board but nothing looks suspicious or burnt. So i took my external ccfl inverter to try to power the monitor ccfl lamps which consisted of 2 lamps on upper part and 2 lamps on the lower part.
Found out the upper ccfl lamp which is supposed to connect to cn304 on the power board did not light up. Then i installed a used working... -
Hello
I have a big problem and that is that in some cases when repairing active pfc power supplies I cannot work with a test lamp. I can only get help with 5 volts standby and for starting and starting I have to work without a lamp and this way there is a possibility of parts exploding and other parts being added.
Sometimes with a multimeter test the problems can be reduced to some extent, but I had several cases that had to be tested on and online and recently two varistors exploded. They had terrible resistance because the power supplies were over 800 watts.
Is there a way... -
Hi all,
I have this Sharp LC-60LE810UN that stays off and blinks a Lamp Error (1 long flash followed by a short flash, in a loop).
I already confirmed that the first backlight strip has an open LED using a LED strip tester. The other 3 LED strips are fine.
Before tearing the LCD panel apart, I want to make sure that the rest of the TV set is good. I've tested the power-supply/LED inverter board by sending 5 volt to PS-ON, to PNL-POW (that commands power the T-CON board only), OFL and STB pins. The power-supply is good.
I've tried all the key...
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