Repair - Williams Joust - PCB Repair #3 - Player Start Crash
7K/7J (no output on Pin 5, hex inverter) 74ls04
https://www.youtube.com/watch?v=h_b7IcSiS1M
your Hakko sounds sick in this video. you use that blue screwdriver cleaning tool inside the shaft of it too right? I picked all kinds of fairy dust out of my FR300 with that.

I also had a lot of problems with my tips clogging. I later discovered I was effectively using the tool wrong. when I placed my last parts order last week or maybe it was 2 weeks ago (working late, I lose track of time easy) I actually conferred with them about the temperature setting and they say they only use 2 (about 700 or 750 degrees). I note this because I read in a thread on here I think about clogging tips and you want 2 because 1 the solder cools off too fast. the other thing I did wrong was I didn't hold the button long enough to allow it to suck everything, so it was collecting in the tip and cooling off.
I also run my Weller station at 650-700 most of the time too. I haven't damaged anything doing this. in fact, the higher temperature has a benefit in that you don't have to touch the parts as long. I've gotten a lot of practice over the years and work way faster than I did when I was about 2-3 years into doing this repair stuff. I can't believe I've been fixing games for almost 10 years already.
yours sounds sludgy, if you haven't already you'll need to take apart that black plastic box inside the yellow cover and soak the plastics, the valve plate inside it, and the hose in alcohol. I went a very long time not doing this and actually went back to the manual and sure enough that was part of the maintenance process.
mine burns a lot of paper filters now, I suspect the tube that holds the solder needs to be replaced now as I've changed everything else. unfortunately that part was on backorder, so I'm waiting for it still. I've actually been breaking out my old shack bulb for the little weak jobs where I don't have to pop ICs and it's been ok.
I need to start unleashing my repair logs soon.