Do you have a question about the Brother TN 430 and is the answer not in the manual?
Lift the developer roller and clean it with a lint-free cloth, avoiding solvents.
Discharge toner, clean hopper with air/vacuum, and clean developer blade with a dry cloth.
Reassemble in reverse, fill with appropriate toner load for TN-430 or TN-460.
Remove screws securing the corona wire assembly using a Phillips screwdriver.
Remove screws holding the drum cleaning assembly (felt, recovery blade, scraper-blades).
Remove and thoroughly clean the drum cleaning assembly of all old toner.
Release the retaining washer from the left side to remove the drum shaft.
Extract transfer roller, clean it with air/vacuum, avoiding solvents.
Use a tester to check electrical continuity between the assembly contact and the drum shaft.