Preparation For Parts Replacement - Oki ES5112dn Maintenance Manual

4.1 Preparation for parts replacement

This section explains the replacement procedure of part, assembly, and unit
in the working place. Disassembling procedure relating to reassembling is
conducted conversely.
(1) Be sure to unplug the AC cord and interface cable before starting to
replace parts.
(a) Unplugging the AC cord by the following procedures.
i) Press and hold the power switch for approximately 1sec. to turn off
the power supply switch.
ii) Unplug the AC insert plug of AC cord from the AC socket.
iii) Unplug the AC cord and interface cable from printer.
Warning
Risk of Electric Shock
There 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 the power
supply, and caution should be exercised during replacement.
The capacitor may take one minute to complete discharge after the AC cord is
unplugged. Also, there is a possibility that the capacitor doesn't discharge because
of a breakage of the PCB, etc., so remember the possibility of electric shock to
avoid electric shock.
(b) Reconnecting the printer by the following procedures.
i) Connect the AC cord and interface cable to the printer.
ii) Connect the AC insert plug to the AC socket.
iii) Press and hold the power switch for approximately 1sec. to turn on
the power supply.
(2) Do not disassemble the printer in the case of normal operation.
(3) Do not disengage the part that there is not any necessary to touch.
Disassembly should be the minimum.
(4) Be sure to use the specified maintenance tools.
(5) Be sure to temporarily install the small part such as screw, collar, and so
on at its original position during disassembling because it is easy to be
lost.
(6) Do not use the gloves that is easy to occur electrostatic while dealing
with IC such as micro-sensor, ROM, RAM, etc. and PCB.
(7) Do not put the print circuit board on the equipment or on the floor directly.
(8) Do not put the Print Circuit Board on the printer of on the floor directly.
Shutting
off
4. REPLACEMENT OF PARTS
Reconnecting
4-2