Hi, I'm repairing my expensive aquarium led lights and need to replace a broken sot23 transistor. I need help in identifying the correct part to order for replacement. I have attached the pic showing markings of B28W and the transistor sits beside a 0 ohm resistor and a capacitor.
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Aquarium led lights ,Transistor Identification
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Re: Aquarium led lights ,Transistor Identification
What makes you think U1 is defective?
Another site with the same board thinks it is a single wire epprom like the microchip 11AA020
I doubt the component is the problem as it doesn't seem to be connected to the actual led's, they drew a diagram:
A closer look and it seems D21 & D22 could be badLast edited by R_J; 11-07-2022, 05:40 PM.
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Re: Aquarium led lights ,Transistor Identification
Originally posted by petehall347 View Postremove it and see if short has goneLast edited by ntec; 11-08-2022, 11:35 AM.
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Re: Aquarium led lights ,Transistor Identification
What make/model aquarium lights are these? Ecotech Marine Radion XR32 I did not find.
I agree it is likely a serial "UNI/O" EEPROM chip (11AA020) that holds some saved config or calibration for LED brightness info etc. You'd have to copy the contents of a good one into a new blank IC. Hopefully there is nothing extreme like a serial number paired to the main board.
Check the MCORE PC board the LED's are mounted on, has not shorted. There is only a thin film between the aluminum and the traces. These aquarium boards frequently get water damage on them.
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Re: Aquarium led lights ,Transistor Identification
[QUOTE=redwire;1178625]What make/model aquarium lights are these? Ecotech Marine Radion XR32 I did not find.
It's the ecotech radion xr30 g4. One thing I forgot to mention that may help identify part, is on my functioning led board that chip is labelled B2Y7.Last edited by ntec; 11-08-2022, 12:40 PM.
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Re: Aquarium led lights ,Transistor Identification
Yes D21 and D22 look the same on the working board. Here is a video of one being taken apart. The Led board i'm trying to fix is the pro version led board which has more leds on it then my old non pro ones so maybe that could be why the markings are different as whatever that chip does has to power more leds but who knows. https://www.youtube.com/watch?v=2BiY...hannel=FixReefLast edited by ntec; 11-08-2022, 11:40 PM.
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Re: Aquarium led lights ,Transistor Identification
Originally posted by redwire View PostI agree it is likely a serial "UNI/O" EEPROM chip (11AA020) that holds some saved config or calibration for LED brightness info etc. You'd have to copy the contents of a good one into a new blank IC. Hopefully there is nothing extreme like a serial number paired to the main board.
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