I thought I'll give back something to this community so today I have taken pictures of how I do AV mod to the old Famicom, replacing RF with composite and adding a RCA connector for sound. Minimal case modifying so it looks nice and almost original. Please note, my way is not perfect considering jailbars. Every Famicom is different, some are nearly perfect while others have visible jailbars. Here I cover the older version - HVC-CPU-0X. There is minor differences in the RF boards between revisions, but nothing that requires pictures of every one. Tools required: Philips screwdriver Soldering iron Solder sucker Wire cutter Round file (Dremel) Parts required: 1x 200R Resistor 1x 120R Resistor 1x 220uF Capacitor 1x 47uF Capacitor 1x Red or White RCA connector ~8-10cm wire Unscrew the 6 screws and remove the bottom of your Famicom. Remove the screws holding the motherboard. If needed - disconnect the controllers. Top side of motherboard: Locate resistors R6 and R12 near the PPU. Remove both and replace R6 with the 200R resistor. Solder and cut the legs - save one. Jumper R12 with the leg you didn't throw away Bottom side of motherboard: Solder the 47uF capacitor between PPU pin #22 (+) and #20 (-). Next we are going to modify the RF board and use it to route composite video to the RF connector. Desolder the marked spots in the picture. I use a fine tip and push the legs through the hole. Also remove the CH1/CH2 switch to make room for the audio RCA connector. Then solder the 120R resistor and the 200uF capacitor like in the picture. Make sure the old components you desoldered is not stuck in any hole. Unscrew the RF board and clean up. Cut the legs of the new resistor and capacitor. Now we need to remove some metal to make room for the RCA connector. I use a Dremel for this, but a round file for metal should work to. When you are happy with the metal work, solder the wire to the RCA connector and tighten it hard to the RF shield. Tip: I use 2 washers that are slightly bigger the the RCA connector to make it sit nice and firm. Solder the wire to cartridge connector pin #46. The final step is to make room in the case for the RCA connector. Here I use a round file for wood and carefully remove material next to the "RF switch". I regularly try to fit the RF board and remove more material if needed. When it looks good, I tighten RF board and then begin to remove some plastic from the bottom cover. Be careful, it's very easy to remove to much. Better take a little at a time and make sure it looks good. Refit the bottom cover and your Famicom should look something like this. Hook it up to your TV and enjoy.