Oki ML420 Maintenance Manual

Also see for ML420 Series: Specification sheet User guide User guide Installation Installation

Contents

Oki ML420 Maintenance Manual Manual pdf 50 page image

Oki Data CONFIDENTIAL42113931TH Rev.1 50 /3. ASSEMBLY/DISASSEMBLYThis section explains the procedures for removing and installing various assemblies and unitsin the field.Description is mainly limited to the removal procedure; installation should basically be performedin the reverse sequence of the removal procedure.3.1 Precaution for Parts Replacement(1) Remove the AC cable and the interface cable before disassembling or assembling.(a) Turn off the AC power switch. Remove the AC input plug of the AC cable from thereceptacle. Remove the AC cable from the inlet on the printer.Interface cableInletAC cableAC receptacleAC input plug(2) Do not disassemble the printer as long as it is operating normally.(3) Do not remove unnecessary parts, and limit the disassembly area as much as possible.(4) Use the designated service tools.(5) Carry out disassembly in the prescribed sequence; otherwise, damage to the parts mayresult.(6) It is advisable to temporarily install screws, snap rings and other small parts in their originalpositions to avoid losing them.(7) Whenever handling the PCB, do not use gloves which may cause static electricity.(8) Do not place the printed circuit board directly on the equipment or on the floor.(9) If adjustment is specified in the middle of installation, follow the instructions.There is a risk of electric shock during replacement of the power supply.Use insulating gloves or avoid direct contact with any conducting part of the powersupply, and caution should be exercised during replacement.The capacitor may take one minute to complete discharge after the AC cable isunplugged. Also, there is a possibility that the capacitor doesn’t discharge because ofa breakage of the PCB, etc., so remember the possibility of electric shock to avoidelectric shock.Risk of electric shock(b) To connect the AC cable again, connect it to the inlet on the printer first, then insertthe AC input plug into a receptacle.