Amazon smart plug no power no response

[garrymc123]

Hi, Guys, my amazon smart plug has stopped working I tried to reset it holding the button in but still the same I have managed to pry it open just not sure where to check for output to the circuit and where to check for voltages...

Any help will be much appreciated

Thanks

[sam_sam_sam]

Re: Amazon smart plug no power no response

Check the ic chip part numbers and see if you can find one that is some type of switching power supply regulator

[redwire]

Re: Amazon smart plug no power no response

I would first check the fuse (square black box). The whole device is at hazardous live, there is no isolation or anything. Making any voltage measurements, you have to be careful. U2 LNK625? DG is the SMPS IC.
Try not to bump the WiFi card, the solder connections break to the PSU board easily.

[stj]

Re: Amazon smart plug no power no response

if you fix it you should install Tasmota on it.
https://tasmota.github.io/docs/#/Home

take the control away from Amazon.

[garrymc123]

Re: Amazon smart plug no power no response

Thanks, guys for the help I have found a data sheet on this chip but not sure what voltages I should be looking for on the pins where would I put my negative probe it's so compact

Thanks

[stj]

Re: Amazon smart plug no power no response

replace any electrolytic capacitor connected to the BYPASS pin.

[garrymc123]

Re: Amazon smart plug no power no response

Hi, guys, I tried to get voltage from the output of the bridge rectifier to check output voltage and I must have made some contact with the pins but it made some bang even tho it was on the output side of the rectifier I will need to order a new fuse and hopefully I haven't damaged anything

[petehall347]

Re: Amazon smart plug no power no response

maybe damaged the rectifier