Notes On Replacement Of Parts - Oki MB461 Maintenance Manual

Oki Data CONFIDENTIAL

4.1 Notes on replacement of parts

(1) Prior to replacing a part, unplug the AC cord and the interface cable.
(a) Be sure to use the following procedure to unplug the AC cord:
Turn off the printer [Hold down the power switch for about a second.].
Pull out the AC plug of the AC cord from the AC power source.
Unplug the AC cord and the interface cable.
Warning
When replacing the low-voltage power supply, electric shock may occur. Wear
insulated gloves, or be careful not to touch the conductors or terminals of the
power supply directly. After the AC cord is unplugged, the capacitor may take
about one minute to discharge completely or, due to PCB breakdown, could not
discharge. Use caution about electric shock.
(b) Always use the following procedure to reconnect the printer:
Connect the AC cord and the interface cable to the printer.
Insert the AC plug into the AC power source.
Turn on the printer [Hold down the power switch for about a second to turn
on the power.].
Unplugging
44871001TH Rev.6
Electric shock hazard
(2) Do not disassemble the printer so long as it operates properly.
(3) Minimize disassembly. Do not detach parts not shown in the part replacement
procedure.
(4) Use the replacement tools specified.
(5) Conduct disassembly in the order instructed, or part damage may occur.
(6) Removed small parts, such as screws or collars, should be tentatively installed in
their original positions.
(7) Do not use static-prone gloves when handling integrated circuits (ICs), including
microprocessors, and ROM and RAM chips, or circuit boards.
(8) Do not place printed-circuit boards (PCBs) directly on the printer or a floor.
Plugging
4.REPLACEMENT OF PARTS
4-2