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Looks like it has one button, ground and Vcc(?) connections.
What does the board do?
What brand/model razor? Does it still work? When it was/is working, what did/does the button switch do (for instance, change speeds?)? Seems like a lot of circuit for just charging the batteries.It is a controller board for an electric razor, it handles charging (NiMh), enabling the motor and controlling an LED.
What brand/model razor? Does it still work? When it was/is working, what did/does the button switch do (for instance, change speeds?)? Seems like a lot of circuit for just charging the batteries.
Can you post some more pictures? Like:
1. the other side of the board
2. the batteries (with mAh capacity showing)
3. the razor apart but still connected to everything.
The burnt component seems to be part of a circuit separate from the 16 pin SMD circuitry but conceivably controlled by it.
My guess.
Have you measured the output of the charging base to see if'n there is any output?
...
Yes, but what is the output voltage of the base?I have tested that, it doesn't charge.
I'll try getting an SOT223 and solder it in, and see what happens.
Yes, but what is the output voltage of the base?
It looks like there are three contacts: +, - and a signal wire, maybe detecting that the razor is plugged in to it.
Verify that the base is working before going to far.
From your measurements in your last post, it looks to be a SOT89 device.
View attachment 92663
My emphasis.... But I'm certain that the batteries do not charge but that the batteries are fine (since I charged one of them myself on a third party charger and got 2 Ah onto one).
My emphasis.
Since the batts appear to be in series, did you try charging (and discharging) both of them while wired in series?
BTW, does the shaver have just one speed, or several (presumably controlled by the button switch)?