Brother MFC-760, Service Manual

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IV - 1
1. DISASSEMBLY/REASSEMBLY
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Safety Precautions
To prevent the creation of secondary problems by mishandling, observe the following precautions
during maintenance work.
(1) Unplug the power cord from the power outlet before replacing parts or units. When having
access to the power supply, be sure to unplug the power cord from the power outlet.
(2) Be careful not to lose screws, washers, or other parts removed for parts replacement.
(3) When using soldering irons and other heat-generating tools, take care not to damage the resin
parts such as wires, PCBs, and covers.
(4) Before handling the PCBs, touch a metal portion of the equipment to discharge static
electricity; otherwise, the electronic parts may be damaged due to the electricity charged in
your body.
(5) When transporting PCBs, be sure to wrap them in conductive sheets such as aluminum foil.
(6) Be sure to reinsert self-tapping screws correctly, if removed.
(7) Tighten screws to the torque values listed on the following pages.
(8) When connecting or disconnecting cable connectors, hold the connector bodies not the
cables. If the connector has a lock, always slide the connector lock to unlock it.
(9) Before reassembly, apply the specified lubricant to the specified points. (Refer to Section 2 in
this chapter.)
(10) After repairs, check not only the repaired portion but also that the connectors and other
related portions function properly before operation checks.
(11) Once the print head 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 equipment completes the head locking operation; doing so will make the print
head unusable and require replacement with a new print head.
When you receive the equipment from the user or when you pack it for sending it back to the
user, check the head locking state.