EEVblog Electronics Community Forum
Electronics => Repair => Topic started by: Laz Creations on March 13, 2020, 09:49:53 am
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Hey guys, I need help identifying a surface mount component on a EKL-HS102-2 HDMI 1x2 Splitter.
Stupid me rushing and not paying attention plugged an 18v adapter into the 5v socket which resulted in a loud pop and a faint smell of smoke.
After pulling it apart and inspecting everything I noticed a small hole in one of the surface mount components.
I am guessing its some type of voltage regulator as its labeled U5 probably a 5v but I am a greenhorn when it comes to surface mount repair and identification and would like to be certain I am repairing it correctly.
I can't make out the whole code written on it as it blew out part of it, it starts with "A" and ends with "B005".
I have spent the last 2 days trying to find a circuit diagram, picture of the circuit and or looking for a component with a similar code written on it but have had no luck.
Any info you can provide would be greatly appreciated.
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Long wild guess...
Had same issues w/those 3 terminal SMD little things..
Absolute no info and no clue to get SMD codes...
Finally in my case it was a plain 3.3V LDO.
Perhaps that is your case - a simple LDO but
the voltage needs to be carefully checked
The markings on the board I would relate to PCB marking
not related to any chip - unless other info available.
Paul
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If the input is 5V, the output must be lower so most likely it is a 3.3V linear regulator. Look at the big IC(s) that it supplies and you may find a datasheet with the recommended supply voltage. However, I would be surprised if the rest of the circuit escaped from such an explosive event.
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Thanks for the reply guys.
You guys are right, the major IC(s) seem to be 3.3v, one is an EP9132 HDMI 1.3 Splitter and the other is a EPF011A Generic MCU with 64K Embedded Flash if I looked these up correct and both run at 3.3v.
I have done a visual inspection and a basic check of the small components which all seem fine but yes its possible it also fried one of the major IC(s) but that's a bit beyond my knowledge to test.
Still cant find anything with the same markings as the blown SMD which makes me paranoid but without more info I may have to risk just trying a replacement with a 3.3v regulator and hoping for the best.
Do SMD regulators always have the same pin layout (first pin ground, second Vout, third Vin) or are they like the bigger counterparts where the pins can have different layouts?
Included a few more images of the whole board and IC(s) which I should have included in the first post, sorry about the image of the EP9132 IC I couldn't get a clearer picture of it as its very faded.