40055101TH Rev.4 154 /4. MECHANICAL DISASSEMBLY AND REASSEMBLYFOR OKIOFFICE44/OKIFAX 4100This chapter explains the procedures for replacement of assemblies and units in the field.4.1 General4.1.1 Precautions for Parts Replacement(1) Before starting disassembly and reassembly, always pull out the AC plug.Note: Unplug the AC power cord from the wall outlet first and then from the facsimile.(2) Do not try to disassemble as long as the facsimile is operating normally.(3) Do not remove unnecessary parts: Try to keep disassembly to a minimum.(4) When disassembling, follow the prescribed sequence. Otherwise, parts may be damaged.(5) Since screws and small parts are likely to be lost, they should temporarily be attached to their originalpositions.(6) When handling items such as printed circuit boards, do not wear gloves that are likely to generate staticelectricity.(7) Using a wrist band connected to the ground will protect semiconductors on printed circuit boards fromdamage by the static electricity.(8) Do not place printed circuit boards directly on the equipment or on the floor.Board or Part Adjustment(a) NCU board DIP switches to be placed in the same position as on the removed board.Refer to Chapter 8.(b) LED print head When the rank marking of the replaced LED print head (new part) is the sameas that of the used LED print head (old part), you do not always have to set theLED print head strobe time by the technical function No. 27. (Refer to section5.1) When the head label of the replaced LED print head (new part) is the sameas that of the used LED print head (old part), you do not always have to set theLED print head width by the technical function No.28. (Refer to table 2.9.1, TFNo.28)(Rev.3)
