Hi,
I have a LUMIMAN Smart Bulb that suddenly stopped lighting one day. The bulb is still detected in the app, but won't light. I've probed around and nothing seems to look off with any of the diodes, caps or resistors. The Bluetooth/Wi-Fi module seems to be working as it's still detected in the app. I even tried deleting and re-pairing the bulb (it didn't light, but I was still able to follow the pairing instructions), it re-paired fine, but still no light.
In diode mode, the LEDs all light up when probed so I'm guessing this means the LEDs themselves are OK. I was expecting to see burn marks around LEDs like I've seen with other bulbs that have died. I was also expecting it to be a simple cap issue - another smart bulb (different brand) that suddenly died just had a cap issue and was repaired by replacing just one cap. Unfortunately, it's none of these on this bulb from the looks of it. I see two ICs on this PCB - a BP2525 and a YT5202a. I suspect the issue must be with one or both of these ICs. Not sure which one yet. I can find a datasheet for BP2525 to get an idea of the pinouts. I can't seem to find any data for the YT5202a IC. Does anyone perhaps know about this IC or maybe an alternative that's close to it? I've attached an image of the YT5202a IC.
I know it's probably not worth repairing this bulb, but this is mainly for fun/learning. I'd like to get it working if possible.
I have a LUMIMAN Smart Bulb that suddenly stopped lighting one day. The bulb is still detected in the app, but won't light. I've probed around and nothing seems to look off with any of the diodes, caps or resistors. The Bluetooth/Wi-Fi module seems to be working as it's still detected in the app. I even tried deleting and re-pairing the bulb (it didn't light, but I was still able to follow the pairing instructions), it re-paired fine, but still no light.
In diode mode, the LEDs all light up when probed so I'm guessing this means the LEDs themselves are OK. I was expecting to see burn marks around LEDs like I've seen with other bulbs that have died. I was also expecting it to be a simple cap issue - another smart bulb (different brand) that suddenly died just had a cap issue and was repaired by replacing just one cap. Unfortunately, it's none of these on this bulb from the looks of it. I see two ICs on this PCB - a BP2525 and a YT5202a. I suspect the issue must be with one or both of these ICs. Not sure which one yet. I can find a datasheet for BP2525 to get an idea of the pinouts. I can't seem to find any data for the YT5202a IC. Does anyone perhaps know about this IC or maybe an alternative that's close to it? I've attached an image of the YT5202a IC.
I know it's probably not worth repairing this bulb, but this is mainly for fun/learning. I'd like to get it working if possible.
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