Stumped... can someone identify this surface mount component?

[appliancesolutionz]

It's got 3 legs (sot-323) and is marked with a PMMQ. It is also marked as "U" on the circuit board. Is anyone familiar with this component?

Thank you!

 

[davenn]

U on a PCB "normally denotes an IC rather than a transistor which are normally denoted Q and sometimes T or TR

maybe its a 3 pin regulator ? show us a sharp and well lit pic

 

[appliancesolutionz]

Hi,

Thank you for your reply and help! Here is the picture you asked for. One more thing... it reads PMMQ. I've seen them read other markings as well.

 

[appliancesolutionz]

Anyone might know what that is? I posted a picture, would appreciate any help on that. Thank you.

 

[davenn]

the component in the pic is too messy with solder flux or something to read anything on it

cant help any further
maybe you can search for a circuit diagram for the unit whatever it is ??
you may need to go to the manufacturer

 

[kpatz]

Can you post a decent resolution pic of the entire board? Or at least the area of the board where the mystery part is?

What is the board from? What does it do?

 

[appliancesolutionz]

The chip has a number on it, "PMMQ". It stems from the main microchip. That is really all I know. Obtaining circuit diagrams aren't really possible. It's for an appliance. Any suggestions?

 

[davenn]

without more circuit info, not really
I couldn't find any reference to a PMMQ device in google

 

[appliancesolutionz]

the component in the pic is too messy with solder flux or something to read anything on it

cant help any further
maybe you can search for a circuit diagram for the unit whatever it is ??
you may need to go to the manufacturer

There is nothing on it, other than "PMMQ".

 

[davenn]

OK then as I suggested earlier, you may need to go to the manufacturer of the equip and see if a schematic is available


Dave