flier129

iTrader: (7)

So after having no voltage regulator via 01+ alternator I managed to send 30 volts thru my car. Causing this:






Left a nice black spot to show me how bad I am. Burned and crack two transistors :(

Is this fixable? It seems to be but just want an experience eye to tell me yay or nay.

Jeff_Ciesielski

iTrader: (10)

Totally fixable. How easy it will be will depend on whether or not you killed any surface mount capacitors in the process.

Also -> Who has to thumbs and called that **** like a pro?
<--This guy .

Braineack

iTrader: (62)

You don't need the one labeled MICA underneath it. But it's a tip125.

the 5V voltage regulator can be picked up at radio shack and replaced...hopefully that's the only thing that fried.

flier129

iTrader: (7)

Yeah, you made my day sad :(.

Im taking it to a computer guru friend of mine. He's worked on **** like this for a good while, he will hopefully be able to fix it for me.

Full_Tilt_Boogie

iTrader: (1)

Hopefully the track didnt lift

flier129

iTrader: (7)

so the 5v is the one that you can barely see?

what is the tip125 used for?

Jeff_Ciesielski

iTrader: (10)

Sorry for that :(. Look on the bright side though, at least you were saved from dumping a bunch of money chasing gremlins while all the while the megasquirt had fried bits.

Also a good consideration, but the MS boards are built pretty sturdy.

Joe Perez

iTrader: (8)

The 5v reg (U5) is the left-most TO220 part.

The two TIP125s are part of the PWM damping circuit, which are used only when you are running low-impedance injectors.

flier129

iTrader: (7)

Oh I see that I fried 3 transistors. That 5v, the most left-most one that Joe said and the two tip125s near where it says MICA. Im going to replace all of them for sure though.

The track doesnt look to be lifted or swollen in any way as well.


Another thing, when I plugged a plug to check spark, when I turn the key over it sparked, but wouldn't spark when I was cranking. Is that because the 5v is fried?

Braineack

iTrader: (62)

it'll spark with power on. but it's now not seeing your CAS input. If the insulators underneath the TIP125s failed and the body is making contact to the heatsink it will fail to operate...plus it's not getting VCC power to most things from the 5v reg that blew.

flier129

iTrader: (7)

Cool, makes sense. Now I just need to get it fixed.

WestfieldMX5

hope you didn't fry the processor!

Joe Perez

iTrader: (8)

The CPU, ironically, is not the most expensive component in that device. DIY sells 'em for $18.

flier129

iTrader: (7)

What are the chances the processor and other important components went out as well? I've seen some pretty worn down processors from overclocking but this is a totally different ballgame lol.

Braineack

iTrader: (62)

I've had two boxes in my hand that had caught on fire...only a few select spark circuit components were bad. everything else was fine! Looked a LOT worse than yours.

Braineack

iTrader: (62)

wow, looks like you are going to be banned soon...

Matt Cramer

It's possible you may have fried D12 or MOV1 as well. But I have fixed ECUs with worse damage than what I can see in that picture.

flier129

iTrader: (7)

here

Are those transistors as well? If so which ones are they and can I buy them from somewhere?

Braineack

iTrader: (62)

D12 is a diode. MOV1 is that big flat disc thing.

hingstonwm

iTrader: (2)

Sorry about the bad news. I do have one question though. Why were you running the 01 alternator? Is there a perceived benefit to running it or was it just what you had laying around?