Chapter 3 Disassembly And Assembly; Safety Precautions - Brother HL-2150N Service Manual

CHAPTER 3 DISASSEMBLY AND ASSEMBLY

1.

SAFETY PRECAUTIONS

To avoid creating secondary problems by mishandling, follow the warnings and precautions
below during maintenance work.
WARNING
• Always turn off the power switch and unplug the power cord from the power outlet
before accessing any parts inside the machine.
• When opening the front cover or back cover to access any parts inside the machine,
never touch the shaded parts shown in the following figures.
• Be careful not to lose screws, washers, or other parts removed.
• Be sure to apply grease to the gears and applicable positions specified in this chapter.
• When using soldering irons or other heat-generating tools, take care not to accidentally
damage parts such as wires, PCBs and covers.
• Before handling any PCBs, touch a metal portion of the equipment to discharge any static
electricity charge on your body, or the electronic parts or components may be damaged.
• When transporting PCBs, be sure to wrap them in the correct protective packaging.
• When connecting or disconnecting cable connectors, hold the connector body, not the
cables. If the connector has a lock, release the connector lock first to release it.
• After a repair, check not only the repaired portion but also all connectors. Also check that
other related portions are functioning properly before operational checks.