44205301TH Rev.1 61 /Oki Data CONFIDENTIAL 4. Component replacement4.1 Precautions on component replacement(1) Remove the AC cord and the interface cable before replacing the parts.(a) Remove the AC cord according to the following procedure.Switch the power switch of printer off “O”.Disconnect the AC insertion plug of the AC power cord from the ACpower source.Disconnect the earth wire from the earth terminal of the AC powersource outlet.Disconnect the AC cord and the interface cable with the printer.Warning Risk of Electric ShockThere is a risk of electric shock during replacement of the low voltage power supply.Use insulating gloves or avoid direct contact with any conducting part of thepower supply, and caution should be exercised during replacement.The capacitor may take one minute to complete discharge after the AC cordis unplugged. Also, there is a possibility that the capacitor doesn’t dischargebecause of a breakage of the PCB, etc., so remember the possibility of electricshock to avoid electric shock.(b) Reconnect the printer according to the following procedure.Connect the AC cord and the interface cable with the printer.Connect the earth wire to the earth terminal of the AC power sourceoutlet.Connect the AC power cord insertion plug to the AC power sourceoutlet.Switch the power switch of printer on “I”.(2) Do not disassemble it if the printer works normally.(3) Disassemble it as required. Do not remove the part that is not shown in thereplacement procedure.(4) Please use the specified maintenance tool.(5) Disassemble it according to the proper procedure. It may cause damage to theparts if disassemble it without following the proper procedure.(6) As the small parts such as the screws are lost easily, please fix them to theoriginal position temporarily.(7) Do not use gloves that may cause static electricity easily when handling IC andthe circuit board such as microprocessor, ROM, and RAM.(8) Do not put the PCB on the device and the floor directly.(9) Do not work for a long time with the printer with the top cover open, and animage drum unit installed in it.RemoveInstall
