Ricoh FW780 Service Manual - Page 151

4.5 CHARGE CORONA WIRE REPLACEMENT [E] [B] [A] [C] [B] [D] 1. Remove the charge corona unit. 2. Remove the 4 grid wires [A] (4 springs). 3. Remove the endblock covers [B]. 4. Replace the corona wire [C] (1 spring). NOTE: (1) Make sure that the grid wires are correctly placed on the eight slots [D], are all straight, and not crossed. (2) Handle the new wire by the ends only. Oil from your hands may cause uneven charge on the drum. (3) Do not expand and bend the corona wires and grid wires. (4) Do not rub the corona wires with rough material (sand paper,... etc.) as this will damage the corona wire. (5) Do not use any solvent to clean the wire as this will cause uneven charge on the drum. (6) Make sure that the wire junction [E] is positioned inside the right endblock. SM 5-17 A163