Precautions On Component Replacement - Oki C710 Maintenance Manual

Oki Data CONFIDENTIAL

4.1 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 AC
power source.
Disconnect the earth wire from the earth terminal of the AC power
source outlet.
Disconnect the AC cord and the interface cable with the 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) 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 source
outlet.
Connect the AC power cord insertion plug to the AC power source
outlet.
Switch the power switch of printer on "I".
Remove
43856301TH Rev.3
Risk of Electric Shock
(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 the
replacement procedure.
(4) Please use the specified maintenance tool.
(5) Disassemble it according to the proper procedure. It may cause damage to the
parts if disassemble it without following the proper procedure.
(6) As the small parts such as the screws are lost easily, please fix them to the
original position temporarily.
(7) Do not use gloves that may cause static electricity easily when handling IC and
the circuit board such as microprocessor, ROM, and RAM.
(8) Do not put the PCB on the device and the floor directly.
Install
4. Component replacement
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