Precautions - Brother HL-4140CN Service Manual

1.

PRECAUTIONS

To avoid creating secondary problems by mishandling, follow the warnings 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 printer.
- When opening the front cover or back cover to access any parts inside the printer, never
touch the shaded parts shown in the following figures.
Periodical replacement parts are the parts to be replaced periodically to maintain printer
quality. These parts would affect the printer quality if they loose their functionality even if they
do not appear to be damaged or there is no change in their appearance.
When replacing the periodical replacement parts, each of the counters need to be reset in order to
record the number of replacement times. Refer to
chapter. The number of printed pages of the printer can be checked on Print Settings. (Refer
to "2.4 Printout of Printer Settings" in Chapter
depending on the type of print job or the paper to being used. The figures indicated as the
approximate life in the table above are worked out when printing a general business document
(in accordance with ISO/IEC 19798) on A4-size paper.
Note:
- If the fuser unit is replaced after errors related to the fuser unit occur, you need to wait
until the printer sufficiently cools down before replacing the unit. After replacing the unit,
turn ON the printer and leave if for approximately fifteen minutes. This will make the
printer to be released from the error.
- After disconnecting flat cables, check that each cable is not damaged at its end or
shortcircuited.
- When connecting flat cables, do not insert them at an angle. After insertion, check that
the cables are not at an angle.
"2. Periodical Replacement Parts" in this
5.) The actual number of printed page will vary
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