PS2 3V Light FET Question

Looks like it circled around and goes under the one above..D11??

Note that it also goes through that feed-thru right near the pin, you'll have to get that one as well.

Thanks Casey!  It's harder to see on the one I have.  It is still hard to find where it goes.

Dave

John,

Can I solder right to that?

Thanks,

Dave

Yes.  Scrape off the coating.  G

Sure Dave, it's just a copper trace.  You may have to slightly "clean" it so that the solder will stick, it may have the solder mask on it.  The one I looked at appears to have solder mask over the feed-thru holes.  I just gently scrape it with the an X-acto knife, with gently the operative word!  You just want to remove the thin plastic coating that's over the feed-thru.

Thanks guys!  I really appreciate the help.

Dave

If you don't think you're making a reliable contact with that via you can run a wire to the pad indicated which is where that trace runs to after the via.

Sad news...the headlight didn't come back.

Thanks to all for the help!

Dave

Bummer.  I have a board here that has a bad headlight, and replacing the FET didn't work, so I'm assuming it's the processor that has the problem.

Did you probe the gate of Q12 FET (pin 1) when headlight is supposedly on?  It's 5V PWM so you'll read, say, 1/2 V DC with a meter (i.e. 10% duty cycle) when ON and 0V when OFF.  You could be "lucky" and have a broken connection after the FET.

I traced it back to the processor, nothing happening there on the 'scope.  I'm not lucky.

Dave and John,  Test the single pin of the fet to the Reverse light pin on the 12 pin.  You should have continuity.  If not, run a jumper wire.   Would not be the first time a trace blew on a PS-2 board.  G