Okay this thread is going to cover my work on the rgb/s-video/composite video (all in one) av famicom. I'm working on a second ultimate av famicom for myself (my first model is going to be converted back to composite video). Also I currently have 3 people who've commissioned me to build them rgb/s-video/composite av famicoms with various bells and whistles. These people have each all given me the required money to order the custom kits from japan needed to do these mods so they're all serious clients who've already put money into this.
With the help of doug I got myself a new toy today:
For some bizarre reason you can't find a store selling a desoldering iron like this in Canada. Which is why it took me so long to finally get one of these. As you can see in the picture it's the same model as my soldering iron. The only difference is that the desoldering iron is 40 watt and the soldering iron is 25 watt. I probably could install the desoldering parts into my soldering iron if I want.
Anyway I took a dead nes pcb I had laying around and did some practice desoldering. After about 3 minutes I learned everything there is to learn about working this desoldering iron. I discovered that this desoldering iron sucks out solder slowly but safely. This desoldering iron also does absolutely no damage to the pcb or the traces even if you press it right against the pcb and suck like crazy. In fact this desoldering iron has such a weak sucker that I have to keep squeezing and releasing the bulb while it's on the spot over and over to get all the solder off. Squeezing the bulb like crazy causes solder to sometimes shoot in random directions but you can always suck the bits of solder away after you clean out the pin.
After mastering my new desoldering iron I took my second av famicom which had a factory pcb with no mods done to it and I got to work. Working slowly and carefully on my av famicom worked great, and in record time I managed to desolder the original ppu chip without causing any damage to the ppu chip or the pcb!
Next I carefully loostened all of the pins with some tweezers. Any pins that didn't come loose easily I used my desoldering iron to clean out those pins until they easily came loose. Then I carefully pried the ppu chip off of the av famicom pcb using a small flat blade screwdriver. I also used a needle to widen one pin hole that was a little tight.
There is absolutely no damage to the pcb here. All the traces and ppu pin solder points are 100% in tact. Then I installed a precision socket into the ppu spot and soldered it in place. I left all 40 pins connected on my precision socket because the pcb of the custom rgb/s-video/composite video kit I use seperates the required pins of the rgb ppu from the av famicom ppu socket pins.
Since I blew solder around when desoldering the composite ppu chip the chip had extra solder on a lot of the pins. I used my desoldering iron to clean up the extra solder on the composite ppu pins. Then I stuck the composite ppu into a standard 40 pin ic socket. And I installed the 40 pin socket into the precision socket. The reason I use a standard 40 pin socket between the ppu and the precision socket is to be sure that the ppu pins don't get bent or damanged. Sticking a standard socket into a precision socket is a bit of a tight fit so I just wanted to be safe.
And what do you know....the system runs perfectly
This system really is as good as it gets. There's zero damage to the pcb. Zero damage to the original ppu chip. And this av famicom has a precision slot soldered in so there's no way that the ppu chip will break the connection or come loose. Finally I have myself an extremely cleanly modded ultimate av famicom. Now all I need is for my rgb kits to arrive so I can build myself one to add to this system. The kit I have right now is going to one of my clients since I plan to build myself a version of the kit that has the extra parts needed for psuedo stereo seperation. Again many thanks to Doug for hooking me up with this MUCH needed desoldering iron
This desoldering iron makes my work 100x easier and safer. This desoldering iron also allows me to do a much cleaner and more professional looking job. You can buy one of these desoldering irons from radio shack in america but unfortunately on their website it says that radio shack only ships to america. Therefore if you don't live in america you need to get an american friend to buy you one of these handy desoldering irons and ship it to you