I am preparing a antminer repair service in my country, but need the hash-board schematics
if some has it let me know or how to find, also I can pay for it and professional assistance .
Thanks
Bitmain is not going to make it easy for you to become a "antminer repair service". They will want everyone to use them. So them giving awaaay schematics or any help don't count on it.
Only way it might work is if you are in country vat/import tax is VERY high. Then you might have good customer base. Most at least newer ones will stick with official bitmain I think.