Xbox360 controller component question

[Trex1967]

ok, I'm new to the forum thing so have patience. I am a little addicted to rescuing xbox360 consoles from eBay. Recently I received a controller with no power so I tore it apart and noticed a component missing from the board near the analogue stick labelled Q4. I have no idea what this is but noticed Q1,Q2, and Q3 in another location on the board. I think it is the same component as the numbers are the same on the 3 remaining. I tried googling part number and nothing. Looks like E2N46. Anyone know what this part is?

[fzabkar]

Can you provide the results of diode tests between each pair of pins? That will help to identify whether you have a MOSFET or BJT.

If you have more PCBs, check whether there is a difference in the part marking. That will help to eliminate the date/batch codes.

[Shonky]

Is it fitted on other boards? Just because a component is missing doesn't mean it's always fitted.

If you have other working boards, check them if part is identical.

Remove a part from one board and test out of circuit. Should be fairly easy to figure if it's a transistor, diode etc. Or if you have one of those component identifiers it will tell you very quickly.

[Trex1967]

OK first thank-you guys n gals for taking the time for me. I am sure there is a component there because I noticed something odd with the pads and touched them up with my iron and found a tiny leg still connected to the board. Also after checking about 8 controllers I didn't have the same board, this is a black controller and most of my others are white so different pcb, but I did manage to find only one picture online and it showed there was a component there. My next task will be to remove one of the others and test it out of circuit right? and I will be purchasing a component identifier it looks handy

[Trex1967]

Ok tester arrived and still not sure what I'm looking at, a mosfet I assume.

[DavidAlfa]

Maybe a IRLML6402PBF ?
I don't think it's critical, open RS, Farnell, Digikey, go to discretes, tranzistors, mosfets, use parametric search.
Anything that can handle 20V and 500mA will likely work there!
Though the circuit  is probably using much less current than that, better safe than sorry.

Find one that has low threshold voltage, similar to that one, around 1V or less, as it's probably powered with 3.3V.
Common fets won't switch very well at such levels.

[Trex1967]

Great info, going to order some parts. Try my luck. Ill come back again and post results. Thanks Dave.

[fzabkar]

It's easy to be wise in hindsight, but ...

http://markingcodes.com/search/c/exxxx

[Trex1967]

You guys are awesome!!..I ordered closest thing I could find on eBay "Transistor IRLML6402 Trpbf 01Ah Mosfet P-Channel Field Effect SOT-23 pi", and it works with no stick drift. A big thankyou to everyone.

[Shonky]

It's easy to be wise in hindsight, but ...

http://markingcodes.com/search/c/exxxx

How do you determine the last 4 digits are date/lot codes though?

[fzabkar]

It's easy to be wise in hindsight, but ...

http://markingcodes.com/search/c/exxxx

How do you determine the last 4 digits are date/lot codes though?

I had no idea until I saw the answer. That's why I said that it's easy to be wise in hindsight.