Twin Famicom stuck on loading screen with known good disk drive

Started by Fami92, January 29, 2023, 03:58:09 pm

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Maybe someone can help me with this problem I'm having. The cartridge side of the Twin Famicom works but the disk just stays on the loading screen with no errors, even with a known good working disk drive. You can eject the disk and it will still be trying to read. I swapped out the mainboard into a known good working unit and have the same issue, it has been recapped and all ic's have been reflowed. Anyone else ever seen this problem, maybe bad RP2C33A ic?



Could be many things, really. Try to check the R211 potentiometer on the power board with a multimeter set to ohms. Should read ~5KOhms. I've had one of these that failed, went open circuit and delivered no power to the motor, which would result in the issue you're seeing.