Problem: There is "Replace..." message after replacement
Even though the instructions for Printer Samsung CLP550 says that it should be removed upwards, there is a small plastic above imaging unit which should be removed first. Otherwise it gets broken during unit pulling out. Instructions do not say nothing about that small plastic coat.
after replacing both imaging unit and transfer unit, printer continuosly report "replace imaging unit" and "replace transfer belt" on the display. On the other side of instructions it is said that it should be reset.
Menu - Maintainance - Check Others - Imaging Unit - Reset - Reset Now
Menu - Maintainance - Check Others - Transfer Belt - Reset - Reset Now