Parts Replacement - Oki B431L6 Maintenance Manual

Oki Data CONFIDENTIAL
This section explains the replacement procedure of part, assembly, and unit in the working place.
Disassembling procedure relating to reassembling is conducted conversely.
3.1 Preparation for parts replacement
(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) Shut off the power switch of the printer. (" ")
ii) Unplug the AC insert plug of AC cord from the AC socket.
iii) Unplug the AC cord and interface cable from printer.
Warning
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) Turn on the power switch of the printer. ("I")
Shutting
off
(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.
44983601TH Rev.1

3. Parts replacement

Risk of Electric Shock
OFF
ON
3. Parts replacement
Reconnecting
3-1 /