C3 Mux schematic

[Mjolinor]

Some schematics for when you fry yours.

I will add any other cables I buzz out or find schematics for if and when.

[DB_member]

Those are not exactly the schematics of an original ACTIA Part D (C3) mux. Quite useful though. From a Russian site you can find the actual shematic (although in a "hard to read copy").

[Kalonmink]

Those are not exactly the schematics of an original ACTIA Part D (C3) mux. Quite useful though. From a Russian site you can find the actual shematic (although in a "hard to read copy").

Could you post or PM me that site?

I am looking fo a solid source to buy an C3 or C4, but it's soo hard with those clones. Everyone keeps telling me to just pass out on those C3 or C4 clones, but I would really want to get one to do some stuff by myself and dont drive to friends to code something or calibrate. That's why I am asking for those schematics to at least have something while (most likely) trying to repair a LQ clone. Also for C3, there seems to be 3 version out right now in 2024:

1. Cheap: yellow PCB with clearly used 2-hand relays and ICs, partially sanded down
2. Mid-Price: Green PCB with white NEC relays. Looks to be of better quality compared to first one, but still a little bit sloppy.
3. Highest price: Green PCB with RED NEC relays. This one looks the best at least to an untrained eye. It even has chokes in place, nothing seems to be missing judging by the photos from sellers and they are identified by using a flex cable instead of PCB2PCB-connector. Didn't see any relays that looked reused or sanded down ICs.

Hopeing for some answer and help THX alot