Chapter 3 Disassembly And Assembly; Safety Precautions - Brother HL-4040CN 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.
HOT SURFACE
Some parts inside the machine are extremely hot immediately after the machine is used.
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.
Caution:
- 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.
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