Got my #immich demo disk!

Pretty cool! https://youtu.be/wSUxK8q4D0Q

Trying to figure out this injector driver module from my truck... It died about a year ago, and I just replaced it at the time, but now I want to repair this one for fun. When it failed, one injector bank quit firing the high voltage. The high side control was open. The only obvious damage was a few burnt resistors and transistors. I replaced all the burned parts and plugged it in, but as soon as it started, everything popped again. Next, I pulled the MOSFETs that control the high side voltage, replaced everything again, and plugged it in… this time nothing burned with the MOSFETs removed. One of the MOSFETs (the bad side) shows about 50 V on the gate when it’s supposed to be low. The good one only has around 1.5 V. When the good side fires, its gate jumps to around 98 V then drops back to ~1.5 V. The bad one just sits at 50 V and drops to ground only when the good one fires. So it seems like something is shorting power to the gate of that MOSFET. I’ll have to replace all the resistors and caps again (I shorted something while testing), but once that’s done I want to track down why the gate’s stuck at 50 V. Maybe another shorted transistor or something... Another weird thing with this, is that the MOSFETs are N channel, so they need higher voltage at the gate than the source to fire, but the voktage seems to be lower… I may just be misunderstanding something there, or they need to be installed for the correct voltages to show up.

Jumpscared by a renault 12 last night.

Buck65... I'll breakout all the dirtbike mix tapes.

Trying to figure out where that pad connects to.... Forgot to mention that the pad directly beside it, on the other transistor (pad is fine) is also the same l with no apparent trace to where it goes. Been trying to continuity test it but can't find it's trace anywhere.

Well... Shit. I'm trying to repair this busted injector driver module for a 7.3L PowerStroke but I totally suck at soldering tiny stuff and ripped a solder pad off for one of the little transistors. Of course its the only pad which doesn't have an obvious trace that I can solder a tiny wire to in an attempt at repairing it. I cannot for the life of me figure out what that pad connects to electrically. Also I discovered the real problem after destroying the pad... A burnt resistor that I traced to the gate of the bank one main power MOSFET. That was the issue all along... a simple easy to replace item. Oh well, I will try to figure it all out and slam new parts at it and cross my fingers.

That's a nice fuckin kitty right there.

Fixed my Akai receiver! Now I just need to finish replacing some of the caps (already done the power section caps), replace light bulbs for the dials, and the blown filter board transistors. Yeah, I decided I'll go all the way and repair it correctly instead of leaving it bypassed.