3-1
Confidential
CHAPTER 3 DISASSEMBLY AND ASSEMBLY
1
PRECAUTIONS BEFORE PROCEEDING
To prevent the creation of secondary problems by mishandling, observe the following warnings
and precautions during disassembly/assembly work.
(1) Be careful not to lose screws, washers, or other parts.
(2) Apply grease to the points specified in this chapter.
(3) When using soldering irons and other heat-generating tools, take care not to damage the
plastic parts such as wires, PCBs, and covers.
(4) Static electricity charged in your body may damage electronic parts.
When transporting PCBs, be sure to wrap them in conductive sheets. When replacing the
PCBs and components including PCBs, put on a grounding wrist band and perform the job
on a static mat. Also take care not to touch the conductor sections on flat cables or wire
harnesses.
(5) After disconnecting flat cables, check that each cable is not damaged at its end or short-
circuited.
(6) When connecting flat cables, do not insert them at an angle. After insertion, check again
that the cables are not at an angle.
(7) When connecting or disconnecting harnesses, hold the connector bodies not the cables. If
the connector has a lock, always unlock it.
(8) After repairs, check not only the repaired portion but also that the harnesses are routed
properly. Also check that the other related portions function properly.
(9) Once the head/carriage unit prints, it will start head locking operation after five seconds
from the end of printing. The head locking operation will take 5 to 10 seconds. NEVER
unplug the power cord before the machine completes the head locking operation; doing so
will make the head/carriage unit unusable and require replacement with a new head/
carriage unit.
When you receive the machine from the user or when you pack it for sending it back to the
user, check the head locking state.
(10) If ink gets on your skin or gets into your eyes or mouth, you need the following treatment.
• If ink gets on your skin, wash it off immediately with soap and water.
• If ink gets into your eyes, flush them immediately and thoroughly with water. If left
untreated, the eyes may become bloodshot or mildly inflamed. If you feel any
discomfort, consult a doctor immediately.
• If ink gets into your mouth, immediately spit it out and consult a doctor.
(11) After completion of reassembly, it is recommended that the dielectric voltage withstand test
and continuity test be conducted.
Before replacing parts or units, unplug the power cord and telephone line. Do not use
switches but unplug the power cord itself.
In particular, when having access to the power supply inside the machine, make sure that the
power cord is unplugged from the electrical outlet; when having access to the main PCB or
modem PCB, make sure that both the power cord and telephone line are unplugged from the
electrical outlet.
WARNING
WARNING
Summary of Contents for Business Smart MFC-J4510dw
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